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What's the max boost an S5 T2 can handle?

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Old 07-11-02, 08:22 PM
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What's the max boost an S5 T2 can handle?

Just wondering what the max boost an S5 T2 can safely handle? I got a jspec ECU when I did my conversion, which contains some kind of aftermarket chip in it. Anyhow, I don't get any fuel cut and during my last run, I hit 12 psi fairly easily at about 6900-7000 rpms.

I thought it could be the boost gauge but its an Apexi EL, so I think those are fairly accurate..
I'm not really wanting to blow my relatively new engine, so when should I be dropping off? Around 11-12 psi?
Old 07-11-02, 08:27 PM
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i believe that the stock turbo wont boost much (if any) more than 12lbs.
Old 07-11-02, 09:46 PM
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Re: What's the max boost an S5 T2 can handle?

Originally posted by turboGXL
Just wondering what the max boost an S5 T2 can safely handle? I got a jspec ECU when I did my conversion, which contains some kind of aftermarket chip in it. Anyhow, I don't get any fuel cut and during my last run, I hit 12 psi fairly easily at about 6900-7000 rpms.

I thought it could be the boost gauge but its an Apexi EL, so I think those are fairly accurate..
I'm not really wanting to blow my relatively new engine, so when should I be dropping off? Around 11-12 psi?
as long as you're not running lean and 12psi is your absolute max boost with no spikes will be ok for a while. 10psi is much safer though.
Old 07-11-02, 10:20 PM
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I was running around 12psi on my S5 with the stock turbo and it took about 1-2 months til the oil seals crapped out...then again it was an old turbo with a bit over 100k miles on it.
Personally, now I would stick with around 10psi but in the end it's your call if you want to push it higher or not.
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