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Old 05-02-2004, 05:57 PM   #1
import111
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Default more boost on 10:1?

I want to know if there is anything I can do to my 01 Impreza 2.5RS motor to handle more than 5-6 PSI w/o lowering compresion ratio or using high octane race gas. Forged aluminum pistons/rods? Bigger injectors, more fuel?
Ryan
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Old 05-02-2004, 06:03 PM   #2
kaos200
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with the catpiss 91 you get (same as our cali 91) why wouldnt you want to lower your compression?
Its not cheap to drive around on 100 all the time
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Old 05-02-2004, 06:34 PM   #3
kastle
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Quote:
Originally posted by kaos200
with the catpiss 91 you get (same as our cali 91) why wouldnt you want to lower your compression?
Its not cheap to drive around on 100 all the time

Agreed.
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Old 05-02-2004, 06:58 PM   #4
import111
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I didn't say I wanted to use race gas either. If I lower the compresion and raise the boost, it will be the same as if I never lowered the compresion. It's like trading a dollar for 4 quarters. I want to keep 10:1 compresion. I might go down to 9.7:1 but that's it, and that's cause the 98 RS has the 9.7:1 but still has 165hp and 166 torque. So is there anything I can do to my car besides lowering compresion or race gas to make it safe to raise the boost?
Ryan
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Old 05-02-2004, 07:00 PM   #5
kaos200
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Quote:
Originally posted by import111
If I lower the compresion and raise the boost, it will be the same as if I never lowered the compresion. It's like trading a dollar for 4 quarters. I want to keep 10:1 compresion. Ryan
that is entirely false, please do a search.
with that theory, might as well go 15:1 and stay N/A, less weight without a turbo and intercooler and you'd make the same amount of power.
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Old 05-02-2004, 07:05 PM   #6
import111
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Look, all I am asking is, does anyone know what I could do to my car to make it safe to run high boost on 10:1 compresion w/o high octane gas?
Ryan
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Old 05-02-2004, 07:07 PM   #7
White 2.5rs
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o2 inj
alc inj
good timing control
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Old 05-02-2004, 07:07 PM   #8
kaos200
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Quote:
Originally posted by import111
Look, all I am asking is, does anyone know what I could do to my car to make it safe to run high boost on 10:1 compresion w/o high octane gas?
Ryan
yes, run pig rich, retard the timing, run colder plugs, run water injection at all times, and knock on wood 10x a day.


and in the end you could have just installed the lower compression pistons instead of the 10:1s and not had to worry.

/done with this thread.
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Old 05-03-2004, 12:06 AM   #9
squirrelmasta
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Why is it a big deal any how? do you want a slower car? cause if you do, you can raise your compression and lower your boost. but really, why?
-Eli
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