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Old 08-10-2002, 06:50 PM   #1
Scooby Newbie
Member#: 22478
Join Date: Aug 2002
Location: Kutztown, Pa
2002 WRX Sedan
Platinum Silver

Question Nitrous Compression Ratio?

Im starting my N/A buildup and am looking at purchasing the Cobb Stage 2 short block, but when I get to where I want to be with the engine (210-220whp) I want to add a 75-100hp shot of nitrous. I was told by a guy at work that If I plan on running nitrous I should stick with the stock compression ratio instead of the 11:1 pistons that come with cobbs kit. Is this true? What is the highest compression that you can run on 93 octane gas with stand alone engine management? Safely of course. Also, as far as increasing the bore and/or stroke on the EJ25 I read somewhere that the bore is already so wide that it can cause problems with fuel burn. What are the positives and negatives to altering the stroke. I know this is alot of questions, but id apreciate any help/advice.
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Last edited by N/A01RS; 08-11-2002 at 01:23 PM.
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Old 08-11-2002, 01:25 PM   #2
Scooby Newbie
Member#: 22478
Join Date: Aug 2002
Location: Kutztown, Pa
2002 WRX Sedan
Platinum Silver


Oh come on, I know theres some really smart people on here!
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Old 08-13-2002, 03:08 AM   #3
Section 8
Scooby Specialist
Member#: 821
Join Date: Jan 2000
Chapter/Region: MWSOC
Location: "Like a hyena you are..."

Ummmm.... ask the person building your engine???

If you spending that kind of money and they can't answer that question.

Hang up the freaking phone.

I could tell you to run 13:1 and go to the paint store and buy chemical Toluine and add large ammounts to your gas. Guess what, your engine builder will say.

"Step away from the crack pipe."

And you will do what they say anyway......


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