BY ACCIDENT



I have a spike in fuel starting around 6000, I know this and I know why so don't say ****.

Timing jumps at 6600 so I am gonna have to do something about that. It didn't feel like it was knocking.

So you might be wondering why I took the rpm's so high... I set the limit to 7200, I floored it in neutral and it never stopped!!!!! The ONLY map that goes past 7200 is the NCVS map, the Revlimt LIMIT was 7200, the Injector map and Ignition map both stop at 7200.

 

Holy sh*t...hope you get that problem figured out!

 

holy jamoley

no rev-limiter FTW.

 

And your motor is still functional???

 

Yup, idles fine. Revs smooth. Took to 7000 a few times in gear.. It sounded very nice up there

 

wow thats high

 

scary, and here I am looking into getting one... I'm surprised it didn't hurt anything...

 

I mis-shifted and hit 8600rpm

 

I miss shifted and hit 9000.. :P but i later found that that might have bent a rod. but that could have also been from detonation, who knows.

 

I might call/email Greddy if I can't figure it out today.

 

Just set your duration to half on the next column, ie 7200 is limit, set 7500 to half duration, to act as a soft limiter.

Jime had the same issue and hit 7500+ on his VQ35.

 

OR, set the max ignition cut.

My fuel maps and what not all go to 8000 for interpolation purposes but my ignition cut hits at 7800.

 

Unless he launches at 7200, he can't use the 2-step then, right?

 

Why not? It's a separate setting. I don't launch at 7800...

 

He He He, I Hit 8800 RPM. (Avatar)

 

My buddy took some girl's 00 Max for a ride and dumped it into 2nd doing 98mph and the needle wrapped around to where the first 0 is in X1000 RPM.

****ing thing runs fine.

DF

 

But can any of you retardmanual drivers do this in neutral

 

I was asking....I thought it was the same setting.

Do you feel the ignition cut is better, then a fuel cut?

 

Rather have a wasted spark than wasted fuel....


BTW I got the wideband in today, I am gonna tune later this afternoon if the rain stops. Car is quite rich, 10-11's at WOT.

 

Why? Just wondering what's the advantage/disadvantage of each.

 

Ignition cut will flood the cylinders and waste fuel.

 

Why would you prefer that over just reducing IPW?

 

?? I'm not, I rather have a fuel cut, I am saying the disadvantage of a ignition cut. Both for safety tho.

 

"Rather have a wasted spark than wasted fuel...."

I read that wrong.

 

I am not sold on one being significantly better than the other.

An ignition cut wastes fuel yes, but if it kicks in like a 2-step it's not as hard as slamming the wall like the stock ECU cut (removing almost all fuel).

A soft fuel cut (reducing PW but not to zero) gives you a softer cut yes but if you've got the foot on the floor the engine momentum and the effect of the interpolation between cells will still carry you up past the cut a ways.

And, would a soft fuel cut (suddenly lean mixture) on a FI car at high rpms cause problems? I don't know. Maybe it's occurring quick enough (ie for a short enough duration) the engine can survive it. What kind of cuts do FI cars typically have?

 

At least on my car, the overshoot isn't much. You can definitely feel the cut, almost a stutter/hesitation. I like it.


I figured...*KABOOM*, however viewing jeremeys' hard fuel cut logs, apparently for at least 600rpm or so.

 

Yeah I'd like to know how some of the factory cuts on boosted cars are being done these days. I'd have to research a bit on some of the other forums; haven't really kept up with anything like that lately - no time.

 

I think many use ignition cut along with cutting boost.

 

That was exactly my thought too.. but I can't say for certain. I mean, would you rather blow an engine or waste a little fuel.

 

How do they manage to do that without damaging the cats?

 

I wonder the same...my GUESS is that they also cut fuel, so

1)Cut ignition/boost and then after X-time
2)Cut fuel