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Old 03-14-2010   #19
slowbubblecar
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Join Date: Oct 2003
Location: Hopkins
Drives: GTS and E55
Posts: 1,105
Re: How much psi can stock internals hold?

The compression of your motor also matters. The lower the compression, the easier it will be to get a good (higher boost) tune on pump gas. Depending on the compression/condition of your motor, I am guessing you could run 18-25psi pump. Having 40k on the motor does not mean it will be in good shape either.
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