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11-01-2009, 03:36 AM
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#1 | |
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AF Newbie
Join Date: Jul 2009
Location: St Cloud, Minnesota
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Lemans 406 nitrous
I have a pontiac 406 freshly rebuilt. Stock crank and rods with speed pro forged aluminum pistons. Will be going with a mild cam. 6x-8 heads, holley 750 carb. How much nitrous could i run on this setup safely?
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Horsepower sells cars, Torque wins races! |
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11-02-2009, 08:25 AM
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#2 | |
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AF -Advisor
 Join Date: Feb 2004
Location: Chesterfield, Virginia
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Re: Lemans 406 nitrous
Stock rods? IMO, ZERO nitrous. Those rods are a blown engine looking for a place to explode. Forged rods are ALWAYS advised by ANY knowledgeable Pontiac builder. Cheap insurance...
Jim |
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11-02-2009, 08:25 AM
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#3 | |
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AF -Advisor
Join Date: Feb 2004
Location: Chesterfield, Virginia
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Re: Lemans 406 nitrous
Stock rods? IMO, ZERO nitrous. Those rods are a blown engine looking for a place to explode. Forged rods are ALWAYS advised by ANY knowledgeable Pontiac builder. Cheap insurance...
Jim |
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11-02-2009, 09:46 AM
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Nothing scares me anymore
 
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Re: Lemans 406 nitrous
That's what I was thinking. The vast majority of automotive engines out there use forged connecting rods, for lightness and strength. The Pontiac V8 uses cast rods, which are considerably weaker and/or heavier.
FWIW all other GM engines for decades have used forged rods. Pontiac used cast rods to control manufacturing costs (in all except a few high performance engines), but this created a critical weakness for extreme performance applications. |
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