RX3 ECU Remap help.

[Working_ZS]

Originally Posted by Lukas

I finally finished, I rode without making changes to 10 000 Rpm. max and capacity to 298, and checked on the computer what are the parameters later I uploaded again the same map, that is tuned and patch to 1000 Rpm. max and change the cylinder calculation to 298 the difference is that after starting the motorcycle for a moment is at 2200 Rpm. After that RPM drops to 1700 RpmEarlier it started warm and immediately had 1700 computer showed that after changing the capacity the RPM correction has decreased to 50-150 before uploading the patch it was over 200 which means that as I thought the lambda probe itself corrects the dose even after changing the cylinder, But if it burns, and in the map will not be entered in the system in the calculation table correct capacity, then probably the mixture will be very bad generally motorcycle can be easily put on 1 wheel only problem is that I ran out of 7th gear.

Yeah, everybody suspected that the O2 sensor was able to correct the air fuel ratio at lower RPM's, but then runs out of range at higher RPMs; this causes it too run lean and hence hotter than normal, which in turn is a threat to the piston running too hot. With your ECU patch, you can feed more fuel and keep the engine temps down, which keeps the piston and engine safe.

[Lukas]

I don't feel any difference in terms of vibration

[Falkon45]

Have you gotten a bigger injector than stock? I think these injectors are rated at 80% capacity. Running lean at the top end will run you pretty close to 100% capacity if you start adding more fuel to compensate. I'd look into an injector about 100ccs bigger. I'd also look into a wide band O2 sensor

[Lukas]

Today I drove 100 km and everything is ok, the injector is set by Oldschooltunning and there is no need to change it. I have modified the map with a different dose of the mixture and injection time, but even on a regular map it will work ok, because it is the lambda that sets the fuel dose, it is important to change in the system folder in the map the capacity to 299, If you don't change it, the motorcycle will have poor up , because above 6000 RPM the engine will not use the lambda and will give the dose up to 249.

[ChopperCharles]

So Lukas, I have a SG400 / RE3 now, and I find the rev limiter artificially low. The bike makes peak horsepower at 9000 rpm, and the rev limiter kicks in at 9500 rpm. The motor pulls super strong right up until it hits the rev limiter, and then a brick wall. Normally a motor will start to lose a little power and when I feel that I shift. And every high-strung small and midsized twin I've looked at generally has the rev limiter kick in 1000-2000 rpm after the horsepower peak.

So, how difficult would it be to find the rev limiter with the ecu hacker, and change it to 10,500 rpm?

And what are my chances of completely bricking my ECU?

Charles

[Lukas]

So you would have to apply a patch, i.e. apply a patch to the bin. file. At first I had a little problem with it, but I figured it out and it worked, it's just that the creator of the program has chosen his own method for this solution. Generally I would have to look again where the limit is and post a tutorial like the last one, I think it was quite understandable from what I remember, in order to patch you have to do it together with uploading the map, which means that you have to download the bin. file of the map and upload it again with the patch attached, But the chance that you turn an ECU into a brick depends exactly on your luck, you have to think about how lucky you are in life, that is, how lucky you are to be able to do something right, preventing theoretical events such as your laptop crashing or the cable disconnecting during upload, there is a very small chance of this happening, but it is there, luckily the update takes a few seconds.But in general I advise against pulling the limiter, because it's very risky. On the contrary I have lowered limiter because of cylinder change, but it's only because of that, as if some idiot came and twisted my throttle to the max, and generally I don't exceed 9000 RPM.

[ChopperCharles]

Well, I pulled down the BIN file and I cannot find a way to turn the rev limiter off. There are no fields for rev limiter like there are for some of the sample BIN files included. At least, none that are obvious.

Charles.

[Lukas]

It's 01:00 at night and I'm not sure I have to check carefully in the morning because I already forgot, but take a peek at this patch you create with the tools on the bar at the bottom right.

[Lukas]

However, it was this file that I checked with my old patch.

[Lukas]

And here is the cylinder capacity.
I wonder if if I changed the capacity to 260cc would it get some power I mean rx3.

[Lukas]

And what charlie? What results?

[ChopperCharles]

Here is the bin file for the SG400. Sorry for the delay, I put the ecu hacker on an ancient netbook just in case it was all virusey, and it's maddeningly slow.

https://drive.google.com/file/d/1s2y...ew?usp=sharing

Charles

[Lukas]

It is exactly as you wrote the limiter comes on at 9800 Rpm and cuts off the fuel at 9950 Rpm.

[ChopperCharles]

That's not what I wrote. The limiter comes on at 9400rpm, not 9800.

You're looking at the decel fuel cutoff I think?
Unlike other models there doesn't seem to be a rev limiter. I also noticed it doesn't look like there is any fuel map beyond 9600 rpm, but I'm completely new at this so I can't tell.

Charles.

[Lukas]

This is what it says in the map file I take into account the slight difference in your perception.