how much boost on stock s4 turbo

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07-02-06, 05:11 PM

kkim

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how much boost on stock s4 turbo

I have a 87 s4 swapped in a na 87.
I was wondering how much boost I can push safely out of the stock turbo. I have the microtech lt10s, downpipe, straight through cat, and walbro 255.

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07-02-06, 05:22 PM

MOBEONER

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i have heard that it can support up to 14.lbs of boost (pushing it)

i have a 88 s4 turbo with an lt12s i will be doing the same

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07-02-06, 05:38 PM

full-cruise

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i would puch it over 12 psi. turbo is just about out of steem and will start to heat up the intercooler.. but 14 is saposed to be the max

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07-03-06, 12:46 AM

kkim

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i appreciate the replies. i just got into the rx7 scene and am trying to figure it all out. also, is it hard to tune the microtech? ive seen a few base maps on here that people posted but that seems to easy.

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07-03-06, 01:05 AM

13b4me

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I would invest in some more supporting mods before raising the boost any... After all the bolt on airflow mods are done, you should already be seeing 9-11psi with a ported wastegate... I wouldn't go much higher than that on the stock injectors... The Microtech helps out alot, but it's nice to have that safety cushion of knowing you have some beefy secondaries...