i recenly broke into my new motor reached 1k miles on the new rebuilt motor and yesterday i was driven it and accedently revved it to8 or 9k cant remember cuz i was use to my other car has a stiffer gas pedal a little bit and this one is super light like pushing a feather lol i just had a heavy foot yesterday but nothing wrong with the engine at all im just worried if i over revved it i hear the stock bpv even spool by just revving and it was pretty loud with just stock sti exhaust lol whats the limit to revving a sti? its an 05 btw thnx
revved high rpm
- Thread starter SeanZ
- Start date
Alin
Diehard Car Enthusiast!
It shouldnt damage the engine if you were in neutral. As long as youre not in gear bouncing off the limiter.
HolyCrapItsFast
Drinks beer!
IMO It is never good to free rev the engine to red line. Just one time isn't going to do anything but try not to ever hit the limiter either free reving or in gear. How's your oil pressure now?
HolyCrapItsFast
Drinks beer!
Unfortunately when it hits the limiter it is cutting out fuel and as it cycles between enrichment and fuel cut out during the limiting routine, it runs lean. The limiter is not meant to be utilized for long periods of time or frequently. So no matter where the rev limit is it is bad. The better solution would be to manipulate the Drive By Wire tables and limit or reduce power at a specific RPM
I might be out in left field on this one but couldn't the ignition be used to control rev limits as well?
Grinder34
Track Monkey
it seems like a soft rev limiter would be a nice option. Like at 6500 rpm its gradually cuts power a) slowing the progression to redline b) making it when/if you do hit redline you're not having a drastic change and c) reminding you to shift. Almost like between 6500 and 7000 you're easing off the pedal, but the ecu does it for you. Clearly this would be "street mode" and not meant for getting every last 1/10th of a second.
Last edited by a moderator:
HolyCrapItsFast
Drinks beer!
Yes but there is no soultion for us to utilize that method on the OEM ECU. The AEM EMS employs this beautifully. One reason the OEM's don't do this is because ignition cut tends to create backfires and backfires are illegal. The ideal solution would be to employ both and cut fuel just before spark and then when coming back on, start spark just before fuel. The AEM also does this.
HolyCrapItsFast
Drinks beer!
Similar threads
