Thread: Launch Control Q's

I used the B13_LC bin and it works. I set the Launch RPM at 3K, and Speed at 14KPH, and moved the hysteresis down to 200RPM. No matter what i set the hysteresis at the RPM jumps at full throttle more than at partial.

At partial throttle it will hold in that 200RPM mark and even down to ~50 RPM, the bit is now set at 04 at 0080 as indicated by Dave, but at full throttle it seems to jump above the 3K by 500RPM or so and it bounces much slower. Is this normal or is there something wrong with my setup.

The TPS voltage seemed fine when i checked them with Nissan Datascan when i first installed the ECU. Anything else that can cause this or is it normal?

I did some data logging and it jumps to 3500RPM then back down at a TPS voltage above 1.9V. The timing drops from 30* to about 22*. Is it just getting too much air and cant control it?

Its just overshooting and has to cut for longer to hit the target.

This is a video i took ages ago when working on the same thing. The second time i touch the limiter is partial throttle, then i move to full throttle and you can see the needle on the dash moving further and the sound gets more aggressive (raspy exhaust).

YouTube - SR20 Drag/Race Launch Limiter - Dash View

i have mine set the same rpm an part throttle it bounces real fadt...then wot it does it the same as this video.....

I guess that is normal then, cause that is what mine is doing.

Have you tried a much lower hysteresis? Something like 50 rpm? I know with the AEM that makes things butter smooth.

yeah my aem is like butter also. 5k and 8 or 10mph cut off.

stratton.

I have it at 50 RPM now and no difference, it is overshoot that is causing the problems.

mine jumps a lot more than that, ima shoot a video and upload it, I always found it normal...