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Old 07-03-2020, 10:53 PM
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eschaider eschaider is offline
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Join Date: Feb 2006
Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4.6
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Meant to add this thought earlier but was suffering's brain fade.

The engine as delivered by Ford is around 10.3:1 or 10.5:1 c/r which is a little frisky for supercharged gas. If you want to run boost in the mid to high teens you probably want to pull the compression back to 8.5:1 or maybe 9:1 max. Moreover the n/a gas pistons in the OEM build would need some vitamin "C" for a supercharged application.

Places I would look to strengthen would be the skirts, dropping the top ring to get it away from the supercharged inferno in the combustion chamber. Increasing the ring package spacing for better seal and performance. Tool steel wrist pins and probably some sort of aftermarket rod replacement for the increased torque.

Still at an $8,150 crate MSRP with a real price somewhere lower than that, even with the price of the Whipple this becomes a very attractive engine alternative with a mountain of torque and power.


Ed
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