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TURBO ON A SIERRA 1500
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Posted: 10/31/08
07:25 PM
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I have a 1990 sierra i have a built 355 with high compression 10.3 to 1 not to much but some. my question to you engine gurus is do you think i can twin turbo with this compression. i know it may be a lil high but i want to be sure. im not running forged internals should i. mind you this motors has zero hours and zero miles zero seconds on it i just finished it and now im kicking myself in the rear. cause i want to go boost what you think?
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STMIKE
Enthusiast
| Posts: 489
| Joined: 11/06
Posted: 12/16/08
05:13 PM
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yes but reliabilty without forged internals will be an issue. also, you'll be running at least 112 and up octane fuel.
i'd find a way to lower the compression either new pistons, different heads or thicker head gaskets.
i've seen guys run .100 thick Cometic multi-layer head gaskets that will drop the compression ratio.
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