CDI is OFF/ON/OFF/ON??? - Page 2

TeamCheap · 05-07-2008, 05:07 PM

From AMR RACING's site

Quote:

AMR's newest Stage 3 rev box for Honda, not only removes the limiter found in the stock CDI unit, it has the most Aggressive Timing Curve possible, built in.

If the box has a timing curve built into it then does that mean it needs to be able to read the engine RPMs and if so where does it get the input from?

Oh I'm just typing jibberish again, sorry I'm wet, tired and hungee

05-07-2008, 05:25 PM

TC dont toy with the dufuses like me..if you know something dang it...just spit it out.

do you think the stage 2 would work?

05-07-2008, 05:27 PM

Quote:

Originally Posted by red2003

My advice, keep the stock box, and save your $60.00 for gas. You'll sure need it at $4.00+ a gallon.

i know this has been said a thousand times, but I still love to walk in a place and have just filled my tank for less than 10 bucks.

TeamCheap · 05-07-2008, 05:53 PM

I know nothing!

(sgt.schults-hogans heroes)

I just suspect for it to advance the timing curve as the RPM's go up it seems like it would need an RPM input into the CDI.
I'm just wondering if my CDI/wire harness plugs were pinned correctly even though the plugs all lined up doesnt really mean it was wired correctly.

Hmm looks like I'll have to do some research and compare some stuff to be sure.

man I'm tired I need a hot shower and a long nap until thursday.

mebigdave · 05-07-2008, 06:02 PM

It could get the rpm from the pickup....

IronFist · 05-07-2008, 07:22 PM

TeamCheap
just suspect for it to advance the timing curve as the RPM's go up it seems like it would need an RPM input into the CDI.

I would think so too. It would need to know what it's doing in order to change it.

mebigdave Posted: It could get the rpm from the pickup....

Yes. Then moving the pick up should work. But again the advance would be liniar and not a curve.

I think

montanaoffroader · 05-07-2008, 10:45 PM

The pickup supplies base timing (ie. starting point) and rpm input for the CDI. The CDI can be built with no advance, fixed advance or a tailored advance curve. An example of a tailored advance curve would be 0 degrees @ 2000 rpm, 2 degrees BTDC @ 3000 rpm, 4 degrees BTDC @ 4000 rpm etc. Assuming that the pickup is set at the factory to TDC (0 degrees), moving it could change the base timing a couple of degrees thru the entire RPM range. Basically, you would be adding these degrees to the amount of advance (if any) that is built into your CDI.

ambassador · 05-07-2008, 10:55 PM

I don't have a starting problem, bike starts just fine.. I DO have an idle problem, not so much of a problem but a chug, chug, chug, "cough" as I stated before.. Once warmed up the bike is fine and will rev to 8000rpm at 85mph with more to go but I'm not gonna push it, it's a China bike after all...

ob1 · 05-08-2008, 07:42 AM

Untold number of hours on my hybrid machine, and every single revolution of the motor has been with an aftermarket CDI and every other typical mod.

The bike is flogged EVERY time I ride it. Flogged hard. I bought the engine on a whim, and have tried my hardest to break it, and failed {so far}

Yes, I get the occasional kick back through the starter.
Zero idling problems.

I burn premium fuel in my bikes.

I'm just sayin'...to each, his own.

warrior91 · 05-08-2008, 02:37 PM

lol hybrid :roll:

05-08-2008, 03:01 PM

do the hybrids get better mileage?

ob1 · 05-08-2008, 03:38 PM

Quote:

Originally Posted by zapkin

do the hybrids get better mileage?

I'm sure it does, the Honda chassis being about 60lbs lighter.

05-08-2008, 03:41 PM

Quote:

Originally Posted by red2003

If that CDI was advancing the timing that much, you can bet it would detonate without race fuel and your piston would have melted down eventually.

Red, wouldnt I be able to hear it knocking? other than that starter issue and a difficult idle the bike ran like a stripped azzed ape. (not sure what that means but mama used to say it)

also, would fixing it be as simple as getting some octane 104+ boost stuff?

i hate to write off 60.00

05-08-2008, 03:44 PM

oh ob1.. I thought you were talking about a hi-bird ... lol

knothead · 05-08-2008, 04:27 PM

Zap,

Did you try running the carb a little richer? Don't know if it would help, but I do know that more advance needs more fuel (oddly enough, sometimes you'll get better gas mileage, the engine doesn't need to be pushed as hard to make power.). The only other thing I could think of being really wrong would be if the base timing on your bike was already pretty advanced... but I doubt if that's the case, stock timing is almost always conservative.

05-07-2008, 10:45 PM	#22
montanaoffroader Join Date: Jan 2008 Location: Great Falls, MT Posts: 166	The pickup supplies base timing (ie. starting point) and rpm input for the CDI. The CDI can be built with no advance, fixed advance or a tailored advance curve. An example of a tailored advance curve would be 0 degrees @ 2000 rpm, 2 degrees BTDC @ 3000 rpm, 4 degrees BTDC @ 4000 rpm etc. Assuming that the pickup is set at the factory to TDC (0 degrees), moving it could change the base timing a couple of degrees thru the entire RPM range. Basically, you would be adding these degrees to the amount of advance (if any) that is built into your CDI. __________________ 2018 SSR XF250, 2001 Xingfu Hunter XF150GY, 1995 Suzuki DR350SE
	0

05-07-2008, 10:55 PM	#23
ambassador Join Date: Jan 2007 Location: Bradenton, Florida Posts: 1,200	I don't have a starting problem, bike starts just fine.. I DO have an idle problem, not so much of a problem but a chug, chug, chug, "cough" as I stated before.. Once warmed up the bike is fine and will rev to 8000rpm at 85mph with more to go but I'm not gonna push it, it's a China bike after all... __________________ 06 Lifan 200 GY-5
	0

05-08-2008, 02:37 PM	#25
warrior91 Join Date: Nov 2007 Location: N.E. Saskatchewan, Canada Posts: 679	lol hybrid :roll: __________________ '91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong)
	0

05-07-2008, 05:25 PM	#17
Guest Posts: n/a	TC dont toy with the dufuses like me..if you know something dang it...just spit it out. do you think the stage 2 would work?
	0

05-07-2008, 05:53 PM	#19
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	I know nothing! (sgt.schults-hogans heroes) I just suspect for it to advance the timing curve as the RPM's go up it seems like it would need an RPM input into the CDI. I'm just wondering if my CDI/wire harness plugs were pinned correctly even though the plugs all lined up doesnt really mean it was wired correctly. Hmm looks like I'll have to do some research and compare some stuff to be sure. man I'm tired I need a hot shower and a long nap until thursday.
	0

05-07-2008, 06:02 PM	#20
mebigdave Join Date: Dec 2007 Location: New Zealand Posts: 196	It could get the rpm from the pickup....
	0

05-07-2008, 07:22 PM	#21
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	TeamCheap just suspect for it to advance the timing curve as the RPM's go up it seems like it would need an RPM input into the CDI. I would think so too. It would need to know what it's doing in order to change it. mebigdave Posted: It could get the rpm from the pickup.... Yes. Then moving the pick up should work. But again the advance would be liniar and not a curve. I think
	0

05-08-2008, 07:42 AM	#24
ob1 Join Date: Jul 2006 Posts: 499	Untold number of hours on my hybrid machine, and every single revolution of the motor has been with an aftermarket CDI and every other typical mod. The bike is flogged EVERY time I ride it. Flogged hard. I bought the engine on a whim, and have tried my hardest to break it, and failed {so far} Yes, I get the occasional kick back through the starter. Zero idling problems. I burn premium fuel in my bikes. I'm just sayin'...to each, his own.
	0

05-08-2008, 03:01 PM	#26
Guest Posts: n/a	do the hybrids get better mileage?
	0

05-08-2008, 03:44 PM	#29
Guest Posts: n/a	oh ob1.. I thought you were talking about a hi-bird ... lol
	0

05-08-2008, 04:27 PM	#30
knothead Join Date: May 2007 Location: In the land of the busted up ricebowl Posts: 815	Zap, Did you try running the carb a little richer? Don't know if it would help, but I do know that more advance needs more fuel (oddly enough, sometimes you'll get better gas mileage, the engine doesn't need to be pushed as hard to make power.). The only other thing I could think of being really wrong would be if the base timing on your bike was already pretty advanced... but I doubt if that's the case, stock timing is almost always conservative.
	0