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Whats the Maximum boost i can go on my 99 si (Still original pistons)?

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Old 07-03-2002, 01:20 PM
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Default Whats the Maximum boost i can go on my 99 si (Still original pistons)?
hi guys ...

Whats the Maximum boost i can go on my 99 si (Still original pistons)?
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Old 07-03-2002, 01:24 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (Still original pistons)? (CiViC SiR)
Properly tuned a/f ratio I say 10 to 12 psi, there are other variables to consider but if the car is daily driven, and would like to keep it reliable I woudln't go any higher. Remember reliability and longevity are 2 different things.


[Modified by POLLO, 5:24 PM 7/3/2002]
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Old 07-03-2002, 01:26 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (POLLO)
is 12 psi save on the track only and for daily use 7.5 psi
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Old 07-09-2002, 12:38 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (Still original pistons)? (CiViC SiR)
12 psi ???!!
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Old 07-09-2002, 12:46 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (CiViC SiR)
Sure you can run 12psi, for a short SHORT while.



[Modified by p0oty, 3:47 PM 7/9/2002]
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Old 07-09-2002, 01:20 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (POLLO)
I say 10 to 12 psi,and would like to keep it reliable I woudln't go any higher. Remember reliability and longevity are 2 different things.
10 to 12 psi on stock internals? have fun, hope you have more $$$$
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Old 07-09-2002, 01:21 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (Still original pistons)? (CiViC SiR)
8lbs.
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Old 07-09-2002, 02:11 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (vtecvoodoo)
boosting 12 on stock internals on a b16 is a gamble, if i were you i would do 6 psi daily, and 10 psi at the track, maybe one run with 12 but it will probably do some damage. Good luck!
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Old 07-09-2002, 02:12 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (EKology)
I'm @10psi w/ stand alone ecu....I wouldn't go any higher w/ out upgrade.
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Old 07-09-2002, 02:13 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (DragIIDigital)
dood if u going to boost, boost high how about 15? lol
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Old 07-09-2002, 02:39 PM
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Default Re: Whats the Maximum boost i can go on my 99 si (redUSDMhb)
get a decompression headgasket...greddy,hks,inlinepro
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Old 07-10-2002, 07:34 AM
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Default Re: Whats the Maximum boost i can go on my 99 si (blufke)
high compression = not alot of boost. Prob 6 lbs will b safe. 12 lb will b pushin it.
use low compression pistons, and thicker head gasket, and u can use more boost. 15+
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