Ill have my diablo sport on monday or tuseday, what should i adjust the rev limiter to? i dont want to spin it to high and break something.

 

why do u wanna change the rev limiter anyway? if u wanna get rid of the speed limiter thats a whole different thing but i wouldnt touch the rev limiter

 

higher rev= stay in power band longer and shift into a higher higher rpm therefore already in the powerband after the shift. unless there is a huge drop in power after 6k....

 

Your power band tapers off after 5800-6000 anyway. Not worth the risk on stock internals.

 

Superchips got my automatic shifting a 6300! Then it will hit the sputter box at about 6500! Shifts hard as heck too

 

hmm... anymore ideas?

 

Increasing the rev limiter is definitely dangerous. Yea, you go faster, but you're also obviously putting more stress on your engine. If Nick_ Thames did it at 6300, then I wouldn't take it any higher than 6300. Stock internals just can't handle the stress.

 

what do you have done to your car to warrant you needing to change the rev limiter? Let's see a dyno graph to see if you even need to. You will not stay in the power band any longer on a stock or near stock Mustang GT by changing the limiter. You have to do quite a bit to affect peak rwhp and rwft-lbs on a Mustang. It's much easier to get low and midrange power.

 

this is why i am asking the question. i dont know what kind of power the car makes past 6k. i have a plenum, 75mm tb, kn intake, offroad x pipe, jba catback. tuner will be in next week. what i want to know is, is there any gain to reving the motor past 6k. say to 6300 or so.

 

I have my cuttoff set at 6200. I try to shift at 6000, even though the car keeps making power well past that.

RPM is a big killer of engines. I don't trust my cast internals much past 6000, although the blower is a big part of this.

Even on a stock GT you should be revving it past the point of peak power. What people don't seem to realise is you need to keep it in the power band.

For example, lets say you peak at 5500 RPM, but you can safely rev to 6200. At 5500 you are making 230 WHP. At 6000 maybe 210 WHP, so your loosing power and should have shifted earlyer right? Not really, cause if you shift at 5500 you might drop down to say 3500 (all bs numbers here, just an example) where you are making 180 WHP, and now you have to climb back thru the RPM band to get into your powerband.