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Old 12-21-2009, 10:01 PM   #1
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Non Pi to Pi compression

I have a 98 gt supercharged and i was thinkin bout puttin on a PI top end and my buddy tells me that the engine compression will be to high. Any truth to this?
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Old 12-21-2009, 10:32 PM   #2
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Re: Non Pi to Pi compression

it definatly does raise it. You can get them and get some lower compression pistons.
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Old 12-22-2009, 08:09 AM   #3
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Re: Non Pi to Pi compression

wasnt it like 10.5:1 or 11:1 or something like that~
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Old 12-22-2009, 08:49 AM   #4
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Re: Non Pi to Pi compression

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wasnt it like 10.5:1 or 11:1 or something like that~
Its up there. Definatly to much for boost.
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Old 12-24-2009, 06:56 AM   #5
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Re: Non Pi to Pi compression

It's 10.5. With a dyno tune and low boost you can run the car fine but like any stock internals with milage, you are on borrowed time.
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Old 12-25-2009, 03:25 AM   #6
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Re: Non Pi to Pi compression

FYI when running boost the ideal compression ratio you want is about eight and a half
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Old 12-25-2009, 05:56 PM   #7
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Re: Non Pi to Pi compression

8.5 eh? good to know. thanks fellas
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Old 12-26-2009, 01:39 AM   #8
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Re: Non Pi to Pi compression

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FYI when running boost the ideal compression ratio you want is about eight and a half
lies.
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Old 12-26-2009, 05:33 PM   #9
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Re: Non Pi to Pi compression

ok then tough guy what do you think?
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Old 12-27-2009, 12:11 PM   #10
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Re: Non Pi to Pi compression

im no toughguy. i was just pointing out non-truth. since you want to be a smartass, do your own research
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Old 12-27-2009, 05:30 PM   #11
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Re: Non Pi to Pi compression

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lies.
No thats a pretty good ratio.
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Old 12-27-2009, 05:41 PM   #12
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Re: Non Pi to Pi compression

it will vary on how much boost but i'm guessing your around 9? The more compression you got the less boost you can use the less compression you got the more boost you can use. If i was at that high of compression i wouldn't even bother with boost but since you already have it just don't use as much psi.
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Old 12-30-2009, 11:26 PM   #13
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Re: Non Pi to Pi compression

hey iamdat im sure other people can answer my question, so i really dont need ya. What do ya think about that?
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