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Boosted SBC question (Penske, you may know the answer here)
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Posted by: BurnOut

Stroker (total displacement 396") SBC w/ 8.5:1 static, mild cam (@5500 RPM redline), on mild (@10-12 pounds, intercooled) boost. Steel crank, rods, forged pistons. Torque monster.

If a ('96-'98 model) two-bolt factory block is converted to splayed 4 bolt mains, would this combo hold together or would it crack a cylinder wall, etc... (bore is only .030" over stock)?? Any thoughts?? Input?? Interesting reading?? All of this is assuming that fueling and detonation are kept under control.

My initial thoughts are that it would be pretty durable since we're not talking a LOT of boost, nor are we talking high RPM. Vortech/Paxton kits frequently offer 5-6 pounds on an internally stock motor, so I am thinking that with the addition of the splayed mains and forged guts (not to mention the lower static compression ratio), adding another 5-6 pounds shouldn't be that much of an issue.

Posted by: Mr. P

What are you talking about, Penske MAY know the answer, ha ha.

Penske knows everything, go ahead, just ask him a question, ANY QUESTION.

my seat-of-the-pants two cents worth, dont think .030 makes any difference on a SBC, as thats just .O15 on each cylinder wall.

Mr. P

Posted by: Penske

.015 off each wall, that's funny...

I don't think .030 is a problem, the splayed mains would take it OK, I'd say go with head studs for better clamping and get a cam made for blower engines (wider LSA, keeps the cylinder pressure down).

Posted by: DODGE_MAIN

Actually the wider LSA on a huffer motor is to keep from stuffing the intake charge out the exhaust. If you wanna keep the cylinder pressure down just go a little higher on duration and a wide LSA starting 112 and up.

As far as will it live block wise? One word SONIC CHECK!!!!

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