EU revlimit settings
Thread Starter
Joined: Dec 2000
Posts: 35,755
From: Lake Orion, MI
EU revlimit settings
Can someone tell me how they did a smoother transisition past the stock revlimit? And how did you guys tune past the revlimit?
Here are my settings and datalog.


I was tuning and I just need this to make it perfect
Here are my settings and datalog.
I was tuning and I just need this to make it perfect
Kev get rid of the rev limit cut map. Not needed at all and it will be smoother using just the I/J map.
Other than that there's no magic bullet, just have to play with varying the fuel ramp up point slightly by 50 rpms less or more, and the PW's to get as smooth a transition as you can (test different gears too, especially 1-3). edit: oops forgot you're auto.. haha. Another thing you can try is moving the last rpm point before the ramp up closer... ie instead of using 6400 use 6450, then 6500 etc. This could make the spike a bit shorter, all depends on your car and how fast it revs up top. Mine goes pretty quick so I had to use 6400, 6450 was too late, but it's something to try.
It's never going to be perfect because you're going from -1.5 to +14 in the span of a very short period and the EU resolution is only 50 rpms, so you'll have a little rich spike but with some fine tuning you can get it to the point where it's pretty smooth and you can only JUST BARELY feel it in the car (and others probably wouldn't who didn't know what they were looking for).
Other than that there's no magic bullet, just have to play with varying the fuel ramp up point slightly by 50 rpms less or more, and the PW's to get as smooth a transition as you can (test different gears too, especially 1-3). edit: oops forgot you're auto.. haha. Another thing you can try is moving the last rpm point before the ramp up closer... ie instead of using 6400 use 6450, then 6500 etc. This could make the spike a bit shorter, all depends on your car and how fast it revs up top. Mine goes pretty quick so I had to use 6400, 6450 was too late, but it's something to try.
It's never going to be perfect because you're going from -1.5 to +14 in the span of a very short period and the EU resolution is only 50 rpms, so you'll have a little rich spike but with some fine tuning you can get it to the point where it's pretty smooth and you can only JUST BARELY feel it in the car (and others probably wouldn't who didn't know what they were looking for).
Thread Starter
Joined: Dec 2000
Posts: 35,755
From: Lake Orion, MI
Originally Posted by DandyMax
Your lag time? Or your input duration from the ECU you mean...?
You know how when you bounce off the revlimit, you see the duration(i called it lagtime). Mine is 1.2 and I think you said yours was 1.5. It seems the ecu adds that past the revlimit. I kinda answered my own question I guess. See how it says 15.2 for the duration at 6700rpm and on the map I put 14.
Yeah that's what I thought you meant, and you're right, the EU will add 14 on top of the 1.x from the ECU, but lag time is something entirely different.
(It's the amount of time an injector takes to open fully from when it first receives the signal.. bigger injectors = bigger lag)
(It's the amount of time an injector takes to open fully from when it first receives the signal.. bigger injectors = bigger lag)
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