Safe boost leve for a stock internal EVO 8

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May 17, 2008, 11:37 PM

racer135

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Safe boost leve for a stock internal EVO 8

What would be the max boost safe level for a stock internals evo 8. Mods on the car are: Works drop in filter, Works TBE Catless, Walbro HPFP, MR DV, ECU Boost Control with GM 3 Port. All the engine internals are stock including the studs. This is a daily driver and not used at the track. This is assuming a good tune on 93 oct pump gas.

Last edited by racer135; May 17, 2008 at 11:40 PM.

May 17, 2008, 11:40 PM

Wicked E

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36 psi to the search button...

-E

May 17, 2008, 11:47 PM

racer135

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I have been searching but I am looking for speak/surge and hold numbers.

May 17, 2008, 11:58 PM

thatguy

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24-25 psi spike sounds reasonable with good parts combo.

May 18, 2008, 12:20 AM

eponti

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I won't go pass 25 psi without the studs specially if it's a DD.

May 18, 2008, 12:50 AM

4WS Tuning

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23ish is approx where you want to be with your mods.

Cheers!

May 18, 2008, 12:54 AM

4WS Tuning

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Quote:

Originally Posted by eponti

I won't go pass 25 psi without the studs specially if it's a DD.

With a good tune, maxing out the stock turbo with factory head studs isn't an issue. You really dont need them. If u like wasting money I have them for sale for 200 shipped ;-p LOL

drive your car without fear of damage. Keep the knock under control and you have nothing to worry about.

Cheers!

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May 18, 2008, 05:44 AM

racer135

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Quote:

Originally Posted by 4WS Tuning

23ish is approx where you want to be with your mods.

Cheers!

Is the 23 PSI the peak/surge boost value I should set for or the steady state pressure? Setting a 23 steady state value will be like a 24-25 PSI overshoot.

Is that OK for a stock EVO? Or should I go for a 23 PSI overshoot with probably about a 21-22 PSI steady state? Th!anks for you help!

May 18, 2008, 05:51 AM

warp9

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Go for the 25 peak as it will drop to 23. By the way, some people push 30 psi on the stock motor with no problems.

May 18, 2008, 05:52 AM

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warp9

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Quote:

Originally Posted by Wicked E

36 psi to the search button...

-E

May 18, 2008, 06:00 AM

#11

MREvolution

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i would stick around 22-23 with stock internals.

May 18, 2008, 06:14 AM

#12

racer135

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Again please specify if you are talking about overshoot or steady state. Or just state both.

May 18, 2008, 06:45 AM

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mpevo8

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its all in the tune. if you have a good tune than you really dont have anything to worry about. but for you i say around 23 psi is safe...with a good tune. Im tuned at 25psi on 93 octane for two years already. IVEYTUNE FTW !