I redlined my car today on the street which i don't normally do. I took it as high as i thought it could go without fuel cutoff kicking in. I believe this is at 8650? Anyhow i looked at my peak number on my VAFC and it measured 8864. I am using the stock ECU with stock cams and i know i am fine up to 9100 with the stock valvesprings. I dont rev that high often at all. Anyhow my question is how come it let it get that high of an RPM? I know the VAFC is actual and indicated it was about 9k on the tach. Thoughts from everyone please

mike

 

I've hit my rev limiter a few times, but I noticed it happens way over 8400. I don't remember exactly where it kicks in, but it's less than 9k. The 8650 you mentioned sounds close, but it's impossible to say exactly because I'm usually just glancing at the tach while upshifting when that happens.

 

The factory tach is inaccurate.

The revlimiter is at 8600 rpm.

All P73 ECUs have the same revlimiter.

 

 

My fuel cut is at 8600 rpm indicated on the factory tach. Guess I'm one of the few lucky ones with an accurate tach.

 

Yeah, one of the very few.

 

Yeah i knew the P73 rev limiter kicked in at 8600. Like i said it registered 8864 on the VAFC as the actual peak RPM when i was driving today and decided to redline the car.

Mike

 

I dont understand? my rev limit is 10k...

 

I know someone can enlighten me here as to why my car revved that high and no fuel cutoff that i heard/felt

 

My fuel cut is at 8600 rpm indicated on the factory tach. Guess I'm one of the few lucky ones with an accurate tach.
_______

 

i wouldnt mind knowing as well, i missed a gear(wouldnt go in to 2nd) and went to over 8700

 

If you mis-shift, nothing can save you.

 

i didnt mis shift(go into another gear) just missed a gear

 

V-AFC isn't accurate either. I've shown almost 8600 rpm with a P72 ECU on a V-AFC.

You didn't go to over 8700 rpm, you cannot with a stock ECU.

 

Reid: that is comforting to know but does that really hold water? I mean isn't the VAFC wired directly into the RPM sensor wire? No reason it would just be wrong or faulty electronics?

 

the vafc rpm reading isnt going to be 100% correct all the time.
go get yourself an aftermarket tachometer like autometer and check it again.

 

Can I clarify that you cannot go beyond 8600 rpm while accelerating. If you mishift from fifth to second at 100 mph you will probably hear sounds you never heard before and it wont be the rev limiter ( I know that is what you meant but I feel bitchy)

 

revlimiter is.......oh, so much fun!

Andy: Who tries not to hit it all the time.

 

Thank you gentleman. Just what i wanted to hear