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Re: 14b custom turbo for lude.
The 7psi rule of thumb applies only to the T3/T4 hybrids, and a few of the larger Garrett T series. A 14B does not flow as efficiently as a hybrid, so the 7psi is not nearly as detrimental as it would be on a T3/T4.
DSM 4g63 compression ratio is around 7-8.0: 1, which is significantly lower than the H22A. As far as engine wear is concerned, a more imminent problem is the presence of engine knock, or detonation. If you don't get it, chances are you'd be alright.
I'm still skeptical on whether the 4g63 manifold will fit on the h22a.
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1993 Mazda Rx-7 Touring
Ricer Extraordinaire
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