Rev Limit Question

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Jun 9, 2011 | 01:44 PM

#16

Kracka

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From: Prosper, TX

I've seen stock rev-limits anywhere from 7400-7800 depending on the ROM number.

Jun 9, 2011 | 02:43 PM

#17

tiggeryellow1

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From: Tampa/Riverview

Quote:

Originally Posted by spooldursti

Lol, no, Chad has not done any of my tunes yet. Im waiting to get a fuel system and possibly a bigger turbo before I make my trip up there. And my point on all I was saying was having a STOCk head and STOCK turbo pushing 8500rpms. Bc the turbo loses efficency way before 8500. Even if your running 30lbs on a stock turbo its pushing way to much hot air to be effecient.

about the stock head, I think everyone agrees not to go to 8500 on stock spring/retainers

Agreed, the stock turbo does run out of push before then

But I think at least as far as when I used to do the email tunes with Mellon he had me do that to 1) Make sure they AFR's were in check and there was no knock up high and 2) So that should I decide to go buck wild and push the car that hard if something else in the motor failed it wouldn't have been on him tune wise. A good CYA move if you ask me... which nobody did but I'm jus sayin.

Jun 9, 2011 | 02:51 PM

#18

tiggeryellow1

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From: Tampa/Riverview

Quote:

Originally Posted by evo8426

Without upgraded cams and valve springs I would not rev past 7500, for one there is no need in it since stock turbo runs out of breath before then and second the valve springs are need to be upgraded to up the rev limit

Not necessarily... I mean maybe on the MIVEC IX’s but not on the VIII's; unless I got some sort of anomaly car. Because the cams I had back when I had “basic bolt ons” was the WORKS 269 which came with springs that I ended up returning for a refund because when we measured the compression rating of my stock springs vs. the WORKS springs mine had a better rating. Don’t ask me how it just was what it was.