Hawk 250 supercharger

[JohnDoe2887]

Hey guys I was wondering if anyone has put a supercharger on a hawk 250? I ask that because why not? I know I could rig something up just don't know how well it would work. Also felt like it was worth asking about before I try and do it and see what others have tried....

[BlackBike]

I have read comments from some of the vets on this site that it's a bit risky for these little motors because parts aren't "proformance " rated.

[w0ss]

I was reading about people using smog pumps as superchargers on small engines. I don't think I will ever try but it's nice to think about.

[JohnDoe2887]

I was reading about people using smog pumps as superchargers on small engines. I don't think I will ever try but it's nice to think about.

Interesting, I was thinking of putting a battery of sterling engines on the exhaust, just a thought though and I guess more of a turbo then a super.... (point stands) while you may not get more than 4-5 psi hey its something.... Good to know about the smog pump I will most likely try that....

[BlackBike]

I think I seen electric blowers on the Web for about 75.00 not sure how they work:shrug:

[Azhule]

I think I seen electric blowers on the Web for about 75.00 not sure how they work:shrug:

Or you can wire up a computer fan and get similar results for about $8 :lmao:

Seriously though... don't spend your cash on that crap... it's just a small fan that does nothing but cause air flow problems :hehe:

[BlackBike]

Or you can wire up a computer fan and get similar results for about $8 :lmao:

Seriously though... don't spend your cash on that crap... it's just a small fan that does nothing but cause air flow problems :hehe:

Believe me AZ, I'm not doing any mods that would popcorn my motor. Snap, crackle, POP!:hehe:

[Azhule]

As for the actual project, I look forward to seeing what you do ;) I'm all for 'More (reliable) POWER!' by any means :hehe:

['16 TT250]

A smog pump won't work and neither will one of those electric blowers. To supercharge it you'll have to rig a way to get a pulley onto the crank or drive it off the chain but then it'll only work at high speed. A turbo would work but it's gonna be hard to find an adequate one without dropping a bunch of $. Either way you'll have to figure out plumbing, carb set-up, timing retard, possibly lower compression, possibly a fuel pump, etc. Unless you can design, build, and install the majority of the stuff yourself it'll probably be cheaper to just buy a more powerful engine.

A nitrous set-up would be cheaper and much easier. Being that it's so cold entering the engine it helps off-set the extra heat made by the extra power, especially when compared to the super heated air off a turbo or SC.

I've searched a bit and haven't found anyone who's done nos or forced induction on a china bike so no clue how much the motor will handle before blowing.

[w0ss]

A smog pump won't work and neither will one of those electric blowers...

The smog pumps have been done by others you can see video of it on youtube. Would need to rig up a pulley for those. There are also some electric smog pumps not sure if those would work. I also doubt the stator puts out enough juice to keep it running.

[pcspecialist]

NOS is the only thing I would even begin to humor.

[jaymalmat]

NOS is the only thing I would even begin to humor.

Like this one. Lol

[hertz9753]

Nos!

[JohnDoe2887]

Like this one. Lol

That looks expensive to run.... I think a foger system under the carb then that.... I have been looking for a excuse to build a spark mill for awhile now....

[JohnDoe2887]

Or you can wire up a computer fan and get similar results for about $8 :lmao:

Seriously though... don't spend your cash on that crap... it's just a small fan that does nothing but cause air flow problems :hehe:

I heard of one that does in fact work, catch being it only makes 4 psi and lasts about 10 seconds before the battery dies....

[pcspecialist]

no one caught my pun?

[JohnDoe2887]

no one caught my pun?

Explain?

[pcspecialist]

"NOS (laughing gas) is the only thing I would even begin to HUMOR.

[JohnDoe2887]

"NOS (laughing gas) is the only thing I would even begin to HUMOR.

Ah I see.... I don't think nitrous would be healthy for this motor....

[pcspecialist]

and a supercharger would be? Nitrous may not be healthy for the motor, but it is the least harmful.

['16 TT250]

Adding X amount of power by any means will stress the motor. Doing it by adding hot air VS. cold nitrous...well, you decide for yourself. The only upside of a TC or SC is that it never runs out of air where a bottle has to be refilled.

I've run lots of nitrous on a few stock V-8s; keep the AF ratio right and the total power boost reasonable and it's no problem. I was spraying 150+ into a stock Mustang Cobra 5.0, tweaked the trans and diff a bit when launched wide open and spraying on hot sticky bias drag tires but that's somewhat expectable. I was told it lifted the left front tire and I was using all stock suspension and running gear with a little ballast in the trunk for extra traction.

['16 TT250]

The smog pumps have been done by others you can see video of it on youtube. Would need to rig up a pulley for those. There are also some electric smog pumps not sure if those would work. I also doubt the stator puts out enough juice to keep it running.

A link to the working smog pump SC video please!

The stator would probably keep up with an electric smog pump because they move very little air at low pressure, you'd get no boost at all.

I did some rough math with a friend of mine for an electric SC for his Dodge pickup, I think it came to somewhere around 600 amps to just keep up and not make boost or be a restriction using 100% motor and pump efficiency which won't be achieved. If you strapped a leaf blower to your bike you might get some boost 'till you ran out of extension cord. At 12 volts it'll take well over 100 amps to run it and the stator makes less than 20 I'm guessing.

[jaymalmat]

That looks expensive to run.... I think a foger system under the carb then that.... I have been looking for a excuse to build a spark mill for awhile now....

http://www.bonanza.com/listings/Honda-XL-230-2-Enduro-Dirt-Bike-NOS-Nitrous-Oxide-Kit-Boost-Bottle/293424221?goog_pla=1&gpid=173784728221&keyword=&goog_pla=1&pos=1o5&ad_type=pla&gclid=CjwKEAjw2PK7BRDPz5nDh9GjoGcSJAAybcS3ac7XvEBV ZjbS0c2cPbcjBdDRM8ve45xSAxlIKH-owBoCR9Pw_wcB

[pete]

supercharger....
seems to me you will have a pile of scrap metal pretty dam quickly...





.

['16 TT250]

http://www.bonanza.com/listings/Honda-XL-230-2-Enduro-Dirt-Bike-NOS-Nitrous-Oxide-Kit-Boost-Bottle/293424221?goog_pla=1&gpid=173784728221&keyword=&goog_pla=1&pos=1o5&ad_type=pla&gclid=CjwKEAjw2PK7BRDPz5nDh9GjoGcSJAAybcS3ac7XvEBV ZjbS0c2cPbcjBdDRM8ve45xSAxlIKH-owBoCR9Pw_wcB

Nowhere in there does it explain how extra fuel is supplied when the nitrous is hit...?!? The kit only shoots nitrous so my best guess is you'll have to jet up and run rich all the time and then lean it back out with the nitrous. Supplying a motor with nitrous and not extra fuel will kill it quickly.

[pcspecialist]

as with all carburated NOS setups, you have to run them rich.

[w0ss]

A link to the working smog pump SC video please!

The stator would probably keep up with an electric smog pump because they move very little air at low pressure, you'd get no boost at all.

I did some rough math with a friend of mine for an electric SC for his Dodge pickup, I think it came to somewhere around 600 amps to just keep up and not make boost or be a restriction using 100% motor and pump efficiency which won't be achieved. If you strapped a leaf blower to your bike you might get some boost 'till you ran out of extension cord. At 12 volts it'll take well over 100 amps to run it and the stator makes less than 20 I'm guessing.

All the ones on youtube using smog pumps are pulley driven.

https://www.youtube.com/watch?v=gERfFq8eAK0

[MDStroup]

I didnt want this to be my first post. I wanted my first post to be me showing off my new Hawk 250. O well. If i can help a fellow motorcycle lover so be it.

The VW smog pump might work on this bike. It is small and surprizingly powerful for what is it. That is because it is actually based on a supercharger. I just cant remember the model you could use.

A better option would be to use an actual small supercharger designed for things like this.

What i am reffering to is the AMR300 and the AMR500. They are actuallt very popular in Europe and Australia . The AMR300 would probably be perfect.

http://www.atltf.com/t3393-superchargers

This site actaully sellls both superchargers and they will ship to the USA. I didnt check to see if he had any in stock right now.

http://www.keicarshop.com/

[JohnDoe2887]

I didnt want this to be my first post. I wanted my first post to be me showing off my new Hawk 250. O well. If i can help a fellow motorcycle lover so be it.

The VW smog pump might work on this bike. It is small and surprizingly powerful for what is it. That is because it is actually based on a supercharger. I just cant remember the model you could use.

A better option would be to use an actual small supercharger designed for things like this.

What i am reffering to is the AMR300 and the AMR500. They are actuallt very popular in Europe and Australia . The AMR300 would probably be perfect.

http://www.atltf.com/t3393-superchargers

This site actaully sellls both superchargers and they will ship to the USA. I didnt check to see if he had any in stock right now.

http://www.keicarshop.com/
Are you sure the would work with a motor so small? I see why you suggested the VW smog pump after following you link vary interesting....

[JohnDoe2887]

as with all carburated NOS setups, you have to run them rich.

What if you had a second sets of jets supplied by a small electric pump that would not be to to hard to make and would more then likely work.... (If it handles Nos/supercharger well....) Why not throw in pre-oxidized race gas? Octane matched of course....

[MDStroup]

Are you sure the would work with a motor so small? I see why you suggested the VW smog pump after following you link vary interesting....

I have no idea if it will work. But if it can be done that is probably the best route to try first.

I just wish these bike came with OHV. The predator engine are honda clones with OHV. The most popular is the 212cc. It is used for go-karts every where. it only costs $100 and is modifiable like crazy!

That motor starts off at only 6.5HP. People get that engine up to 32HP. The only billet required internal is the connecting rod.

I know for a fact that people have super and turbo charged that motor.

http://www.kemotorsport.com/cafe.htm

Here is a 50cc bike that is using the VW smog pump.

I think the easiest way to super or turbo charge the hawk 250 would maybe convert it to EFI with a EFI from a scooter. If I am remebering correctly someone did that to a Ninja 250 over on the Ninjette form then added the ecotron turbo.

[JohnDoe2887]

I have no idea if it will work. But if it can be done that is probably the best route to try first.

I just wish these bike came with OHV. The predator engine are honda clones with OHV. The most popular is the 212cc. It is used for go-karts every where. it only costs $100 and is modifiable like crazy!

That motor starts off at only 6.5HP. People get that engine up to 32HP. The only billet required internal is the connecting rod.

I know for a fact that people have super and turbo charged that motor.

http://www.kemotorsport.com/cafe.htm

Here is a 50cc bike that is using the VW smog pump.

I think the easiest way to super or turbo charge the hawk 250 would maybe convert it to EFI with a EFI from a scooter. If I am remebering correctly someone did that to a Ninja 250 over on the Ninjette form then added the ecotron turbo.
Hum I will look into that more.... What is EFI when it's all said and done? Mad air flow a O2 sensor and a fuel system no? (Depending on cost I wonder if my own couldn't be scratch built. For about same if not less:)

[BlackBike]

I have no idea if it will work. But if it can be done that is probably the best route to try first.

I just wish these bike came with OHV. The predator engine are honda clones with OHV. The most popular is the 212cc. It is used for go-karts every where. it only costs $100 and is modifiable like crazy!

That motor starts off at only 6.5HP. People get that engine up to 32HP. The only billet required internal is the connecting rod.

I know for a fact that people have super and turbo charged that motor.

http://www.kemotorsport.com/cafe.htm

Here is a 50cc bike that is using the VW smog pump.

I think the easiest way to super or turbo charge the hawk 250 would maybe convert it to EFI with a EFI from a scooter. If I am remebering correctly someone did that to a Ninja 250 over on the Ninjette form then added the ecotron turbo.

This was my question, how. I see , thanks for posting the link-radical dude:D

Hum I will look into that more.... What is EFI when it's all said and done? Mad air flow a O2 sensor and a fuel system no? (Depending on cost I wonder if my own couldn't be scratch built. For about same if not less:)
I believe the full blown (excuse the term) ecotron efi system or the motorcycle is like $700.
http://www.ecotrons.com/products/small_engine_fuel_injection_kit/ half the cost of the entire bike:ohno:

['16 TT250]

as with all carburated NOS setups, you have to run them rich.

No, the extra fuel comes on with the nitrous through it's own solenoid.

[MDStroup]

This was my question, how. I see , thanks for posting the link-radical dude:D


I believe the full blown (excuse the term) ecotron efi system or the motorcycle is like $700.
http://www.ecotrons.com/products/small_engine_fuel_injection_kit/ half the cost of the entire bike:ohno:

Your welcome. I have actually been looking supercharging a motorcycle for a long time. Mainly just as a project. Hopefully one day it will happen.

[Weldangrind]

JD, I'm really hoping you actually supercharge a bike; I'd geek right out.

[JohnDoe2887]

This was my question, how. I see , thanks for posting the link-radical dude:D


I believe the full blown (excuse the term) ecotron efi system or the motorcycle is like $700.
http://www.ecotrons.com/products/small_engine_fuel_injection_kit/ half the cost of the entire bike:ohno:

So the raspberryPI solution it is.... And some junk yard parts.... And duck tape.... Maybe a little JB weld....

[MDStroup]

So the raspberryPI solution it is.... And some junk yard parts.... And duck tape.... Maybe a little JB weld....

Hey! Raspberry Pi's have been used to control robotic quadcopters with bananas! I think it maybe a little to advanced for this project. I think a ti30 would be perfect! :lmao:

[JohnDoe2887]

Hey! Raspberry Pi's have been used to control robotic quadcopters with bananas! I think it maybe a little to advanced for this project. I think a ti30 would be perfect! :lmao:

Yea I can get the Chinese clones cheap maybe even Amazon, I wonder if a chip could do it.(9$ sbc there making....)

[MDStroup]

Yea I can get the Chinese clones cheap maybe even Amazon, I wonder if a chip could do it.(9$ sbc there making....)

They still make the orangePi?

But in all seriousness, if you want to use the RaspberryPi as an ECU, i will look up a thread i bookmarked were a guy did turn a RaspberryPi into a ECU. It had all the links and instructions to do so.

[JohnDoe2887]

They still make the orangePi?

But in all seriousness, if you want to use the RaspberryPi as an ECU, i will look up a thread i bookmarked were a guy did turn a RaspberryPi into a ECU. It had all the links and instructions to do so.

Why that surprises me I do not know.... Thanks for the lead and I will be looking for that myself, I would be surprised to see hack a day or someone like them didn't make a article on that.

[kohburn]

as with all carburated NOS setups, you have to run them rich.

that's only dry nitrous kits. a wet kit has jets to include fuel with the delivery.

[Kdburtch]

Dive in, Worst case scenario you have to buy a new Hawk motor which I believe are going for about $500. This bike with 20-25HP would be phenomenal.

[Weldangrind]

Dive in, Worst case scenario you have to buy a new Hawk motor which I believe are going for about $500. This bike with 20-25HP would be phenomenal.

And I bet it would sound wicked.

['16 TT250]

What if you had a second sets of jets supplied by a small electric pump that would not be to to hard to make and would more then likely work.... (If it handles Nos/supercharger well....) Why not throw in pre-oxidized race gas? Octane matched of course....

Most nitrous systems use a fuel jet and a solenoid to allow fuel through that jet, no need to reinvent the wheel to get a controllable fuel shot with the nos shot. Most systems use a fuel pump, but it can be done with a gravity feed with the right fuel jet.

The only stuff I know of that is oxidized is nitro fuel and wouldn't get along with the carb or motor. If you went that route you'd have to jet for it and be stuck running that high $ stuff all the time, it would also get much lower MPG adding to the cost.

Way back when I knew little about fuels and motors I decided to put some model airplane fuel (about 50% nitro) in my Honda MB5. Those little airplane motors make a lot of power for their size so it sounded like a great plan to kick up the little bike's power. I couldn't get it to start on the kicker but with a guy helping push I eventually got it to fire. It barely ran at first but as it warmed up it seemed to be getting happier and at one point it did have some serious power. I pulled back into my parking spot and it was idling around 3K and climbing so I turned it off, the idle continued climbing-WTF? So we're staring at it and I'm starting to freak out. I pulled the plug wire thinking the switch was bad, nothing. Pulled the choke hoping to flood it, just got stronger. Luckily it was only a 50cc motor so I held the rear brake and killed it by letting the clutch out. I drained that stuff out and never tried it again.

[Weldangrind]

Way back when I knew little about fuels and motors I decided to put some model airplane fuel (about 50% nitro) in my Honda MB5. Those little airplane motors make a lot of power for their size so it sounded like a great plan to kick up the little bike's power. I couldn't get it to start on the kicker but with a guy helping push I eventually got it to fire. It barely ran at first but as it warmed up it seemed to be getting happier and at one point it did have some serious power. I pulled back into my parking spot and it was idling around 3K and climbing so I turned it off, the idle continued climbing-WTF? So we're staring at it and I'm starting to freak out. I pulled the plug wire thinking the switch was bad, nothing. Pulled the choke hoping to flood it, just got stronger. Luckily it was only a 50cc motor so I held the rear brake and killed it by letting the clutch out. I drained that stuff out and never tried it again.

That's the best story I've read in awhile! :D

['16 TT250]

As far as SC vs nos goes, we've already discussed the heat issue of a SC as well as having to figure out a pulley to drive it. Also consider the space needed. If it's a suck through system it'll probably be hard starting and likely have response issues. If blow through you'll need a fuel pump and pressure box for the carb, or a carb that can take it without a box, or fuel injection. Also consider that it takes power to run the SC so for every 1HP you get out of it you will be putting more than 1 hp of strain and heat on the engine further limiting what you can get out of it. For perspective, the SC on a top fuel car takes about 500hp to spin and it nets about 1500hp propelling the car. These are old numbers and not directly scalable, but just a thought to ponder.

The only real downside for nos is that you do have to refill the bottle whereas a SC never runs out of free air. This motor would be getting a very small shot of nos so it wouldn't cost a lot to use for occasional bursts. On one car that I ran a lot I was shooting about 100hp and would make 4-6 1/4mile passes in a day with no problem on a 10lb bottle, refills were 3.50/lb. At roughly $4 per pass it would take a lot of racing to offset the cost of a SC. I was using it quite a bit so I made my own transfer station at home with 3 different bottles to get the most I could out of each refill. The bottle can't be used to empty so there's always some left. Running a little bottle on the bike and having a standard 10# bottle to fill it with will get you a lot of run time between buying refills.

If you wanted a constant power increase like for high speed freeway cruising nos wouldn't be a good way to go, but heat would likely kill the engine under constant boost so I don't think it's a solution anyway. I had a Yamaha 650 turbo many years back and I remember feeling the engine heat on my legs when I'd run a long time under boost. In fairness I was sometimes shoving 16+psi into it, but even when I dialed it down to 12psi I could feel it and any amount of boost adds heat.

[pcspecialist]

that's only dry nitrous kits. a wet kit has jets to include fuel with the delivery.

Yes, motorcycles with no fuel pump typically use dry.

[JohnDoe2887]

Most nitrous systems use a fuel jet and a solenoid to allow fuel through that jet, no need to reinvent the wheel to get a controllable fuel shot with the nos shot. Most systems use a fuel pump, but it can be done with a gravity feed with the right fuel jet.

The only stuff I know of that is oxidized is nitro fuel and wouldn't get along with the carb or motor. If you went that route you'd have to jet for it and be stuck running that high $ stuff all the time, it would also get much lower MPG adding to the cost.

Way back when I knew little about fuels and motors I decided to put some model airplane fuel (about 50% nitro) in my Honda MB5. Those little airplane motors make a lot of power for their size so it sounded like a great plan to kick up the little bike's power. I couldn't get it to start on the kicker but with a guy helping push I eventually got it to fire. It barely ran at first but as it warmed up it seemed to be getting happier and at one point it did have some serious power. I pulled back into my parking spot and it was idling around 3K and climbing so I turned it off, the idle continued climbing-WTF? So we're staring at it and I'm starting to freak out. I pulled the plug wire thinking the switch was bad, nothing. Pulled the choke hoping to flood it, just got stronger. Luckily it was only a 50cc motor so I held the rear brake and killed it by letting the clutch out. I drained that stuff out and never tried it again.

Great story one of the best I have ever heard! That said you do know why that happened right? The only thing I would have done is turn off the fuel instead of flooding it. As for what happened I believe they used to call that ghosting or ghost running something like that. Any ways cause everything is being driven by belt the engine doesn't stop fireing typically it just burns the fuel in the lines.... But here my assumption is that because it was gravity fed that it kept feeding it. What you saw at first vary well could have just been fumes.... Speaking of which another thread for another day. Hey guys I am still saving up for my hawk can someone get me the carb intake measurements and the air box measurements? Thanks!! I want to start looking at my options....

[JohnDoe2887]

As far as SC vs nos goes, we've already discussed the heat issue of a SC as well as having to figure out a pulley to drive it. Also consider the space needed. If it's a suck through system it'll probably be hard starting and likely have response issues. If blow through you'll need a fuel pump and pressure box for the carb, or a carb that can take it without a box, or fuel injection. Also consider that it takes power to run the SC so for every 1HP you get out of it you will be putting more than 1 hp of strain and heat on the engine further limiting what you can get out of it. For perspective, the SC on a top fuel car takes about 500hp to spin and it nets about 1500hp propelling the car. These are old numbers and not directly scalable, but just a thought to ponder.

The only real downside for nos is that you do have to refill the bottle whereas a SC never runs out of free air. This motor would be getting a very small shot of nos so it wouldn't cost a lot to use for occasional bursts. On one car that I ran a lot I was shooting about 100hp and would make 4-6 1/4mile passes in a day with no problem on a 10lb bottle, refills were 3.50/lb. At roughly $4 per pass it would take a lot of racing to offset the cost of a SC. I was using it quite a bit so I made my own transfer station at home with 3 different bottles to get the most I could out of each refill. The bottle can't be used to empty so there's always some left. Running a little bottle on the bike and having a standard 10# bottle to fill it with will get you a lot of run time between buying refills.

If you wanted a constant power increase like for high speed freeway cruising nos wouldn't be a good way to go, but heat would likely kill the engine under constant boost so I don't think it's a solution anyway. I had a Yamaha 650 turbo many years back and I remember feeling the engine heat on my legs when I'd run a long time under boost. In fairness I was sometimes shoving 16+psi into it, but even when I dialed it down to 12psi I could feel it and any amount of boost adds heat.
There are other ways to shead heat then just radiation.... I think it's worth exploring other options, as apposed to the old radiator and coolant path....

[Ariel Red Hunter]

Great story one of the best I have ever heard! That said you do know why that happened right? The only thing I would have done is turn off the fuel instead of flooding it. As for what happened I believe they used to call that ghosting or ghost running something like that. Any ways cause everything is being driven by belt the engine doesn't stop fireing typically it just burns the fuel in the lines.... But here my assumption is that because it was gravity fed that it kept feeding it. What you saw at first vary well could have just been fumes.... Speaking of which another thread for another day. Hey guys I am still saving up for my hawk can someone get me the carb intake measurements and the air box measurements? Thanks!! I want to start looking at my options....
Ghost running, hmm. Is that related to the old saw "There'll always be an England, because the engines keep running on!!". :)

[JohnDoe2887]

Ghost running, hmm. Is that related to the old saw "There'll always be an England, because the engines keep running on!!". :)

https://en.m.wikipedia.org/wiki/Dieseling
I thing ghosting is slang.... The heat from his engine was most likely the cause of his continued firing....

[jimwildman]

As far as SC vs nos goes, we've already discussed the heat issue of a SC as well as having to figure out a pulley to drive it. Also consider the space needed. If it's a suck through system it'll probably be hard starting and likely have response issues. If blow through you'll need a fuel pump and pressure box for the carb, or a carb that can take it without a box, or fuel injection. Also consider that it takes power to run the SC so for every 1HP you get out of it you will be putting more than 1 hp of strain and heat on the engine further limiting what you can get out of it. For perspective, the SC on a top fuel car takes about 500hp to spin and it nets about 1500hp propelling the car. These are old numbers and not directly scalable, but just a thought to ponder.

The only real downside for nos is that you do have to refill the bottle whereas a SC never runs out of free air. This motor would be getting a very small shot of nos so it wouldn't cost a lot to use for occasional bursts. On one car that I ran a lot I was shooting about 100hp and would make 4-6 1/4mile passes in a day with no problem on a 10lb bottle, refills were 3.50/lb. At roughly $4 per pass it would take a lot of racing to offset the cost of a SC. I was using it quite a bit so I made my own transfer station at home with 3 different bottles to get the most I could out of each refill. The bottle can't be used to empty so there's always some left. Running a little bottle on the bike and having a standard 10# bottle to fill it with will get you a lot of run time between buying refills.

If you wanted a constant power increase like for high speed freeway cruising nos wouldn't be a good way to go, but heat would likely kill the engine under constant boost so I don't think it's a solution anyway. I had a Yamaha 650 turbo many years back and I remember feeling the engine heat on my legs when I'd run a long time under boost. In fairness I was sometimes shoving 16+psi into it, but even when I dialed it down to 12psi I could feel it and any amount of boost adds heat.




for a decent accross the board gain just eliminate the cat. it's probly full of lead anyway.

you need a welder to do it , cut out the section of pipe with the honeycomb in it and replace it with a meduim walled pipe of similiar diameter..

some porting of the weld imside the pipe at the flange area wouldnt hurt either.

[JohnDoe2887]

for a decent accross the board gain just eliminate the cat. it's probly full of lead anyway.

you need a welder to do it , cut out the section of pipe with the honeycomb in it and replace it with a meduim walled pipe of similiar diameter..

some porting of the weld imside the pipe at the flange area wouldnt hurt either.

If I was to go as far as to port the head I would just buy a 3D printer and make a new one.... (Send it off to be metal casted of course....)

[MDStroup]

https://www.monoprice.com/product?p_id=13860

www.raspberrypi.org/products/pi-zero/

Just a heads up. If you really want to use a single board computer to make an ECU, do use the Chinese knock off(that is ironic on this forum). They had really spotty quality. Go with the RaspberryPI Zero. It is just under the power of a RaspberryPi 2 but it only costs $5.


Also if you are serious about the 3D printing look at the monoprice select V2. It is a rebranded Wanhao duplicator i3 V2 so it uses all of the same upgrades. An you can pick them up all day at $350. Even better, monoprice runs a 20% off discount every once in a while so you can get it for only $300 shipped to your house!

Sorry the links are so funny. I am on a tablet so it is hard to copy and paste. I can fix it when i am able to get on a computer.

[MDStroup]

www.reddit.comr3Dprintingcomments3o3ne6owners_of_a _wanhao_duplicator_i3_what_are_the/


Here is a link to so great upgrades for the Wanhao duplicator i3 V2/Monoprice select v2

[MDStroup]

Also, if you want a little boost in power why dont you put on the munki 30mm carb( not the 26mm that some people have put on) and the Pro Circuit T4 exhaust for the Honda CRF230f? It was already shown in a thread about an exhaust for the Hawk 250 in a video that the T4 exhaust nets about 5hp on a 200cc bashsan bike.

['16 TT250]

Great story one of the best I have ever heard! That said you do know why that happened right? The only thing I would have done is turn off the fuel instead of flooding it. As for what happened I believe they used to call that ghosting or ghost running something like that. Any ways cause everything is being driven by belt the engine doesn't stop fireing typically it just burns the fuel in the lines.... But here my assumption is that because it was gravity fed that it kept feeding it. What you saw at first vary well could have just been fumes.... Speaking of which another thread for another day. Hey guys I am still saving up for my hawk can someone get me the carb intake measurements and the air box measurements? Thanks!! I want to start looking at my options....

I know exactly what happened, this fuel is compression ignited like diesel fuel so once the combustion chamber got hot enough it kept running. Closing the fuel valve would have meant waiting for the carb to empty and it was already heading towards 10K RPM when I killed it. Top fuel cars, which also run nitromethane, run without spark after about half track since the plugs are toast by then. They shut the fuel off to shut the engine off and since they're injected the fuel flow stops right away.

Never heard of ghost running and no clue what belt you're talking about, there's no belt on that bike nor most other bikes. What fumes? You might be hitting the pipe a bit too much and the smoke has clouded your thoughts.

[JohnDoe2887]

I know exactly what happened, this fuel is compression ignited like diesel fuel so once the combustion chamber got hot enough it kept running. Closing the fuel valve would have meant waiting for the carb to empty and it was already heading towards 10K RPM when I killed it. Top fuel cars, which also run nitromethane, run without spark after about half track since the plugs are toast by then. They shut the fuel off to shut the engine off and since they're injected the fuel flow stops right away.

Never heard of ghost running and no clue what belt you're talking about, there's no belt on that bike nor most other bikes. What fumes? You might be hitting the pipe a bit too much and the smoke has clouded your thoughts.

I first read about that on a forum so yea.... And there if I remember correctly they were talking about old fords that wouldn't stop when turned off that was when I was like 11/12 I don't remember the details.... I do remember it was when I first started to get into motors and cars.... A had a cluster f@$k of mind thoughts there.... =P

[Ariel Red Hunter]

I first read about that on a forum so yea.... And there if I remember correctly they were talking about old fords that wouldn't stop when turned off that was when I was like 11/12 I don't remember the details.... I do remember it was when I first started to get into motors and cars.... A had a cluster f@$k of mind thoughts there.... =P
If you read that link that was posted on "Dieseling - - - ", one of the last lines explains why too lean running can cause dieseling, also known as "running on" and maybe even the term I've never heard before "ghost running." :p And I don't think I am the only one who thinks these engines are set up too lean at the factory.

[Riderx]

Start with big bore kit if you can find one.

[sshevie]

The problem as I see it with a such is air flow. You are running a two valve head .

[Riderx]

Hey guys I was wondering if anyone has put a supercharger on a hawk 250? I ask that because why not? I know I could rig something up just don't know how well it would work. Also felt like it was worth asking about before I try and do it and see what others have tried....

You're top end speed will stiil be governed by the transmission. After tuning the engine with carb jetting, high flow intake and exhaust, the only cheap and practical transmission remedy for top end speed will be with counter sprocket and rear sprocket configuration.

[Riderx]

You're top end speed will stiil be governed by the transmission. After tuning the engine with carb jetting, high flow intake and exhaust, the only cheap and practical transmission remedy for top end speed will be with counter sprocket and rear sprocket configuration.

"Any crash you walk away from is a good landing".