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Old 05-22-2003, 11:37 AM
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Post Destroked 454??

Has anyone destroked a 454 to 440 427 or any other stock crank application? Hp numbers torque numbers setup info would be nice.

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Old 05-22-2003, 07:04 PM
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thousands of de-stroked 454 were built in the late sixties early seventies, find any older Hot Rod type mags and you can see the hp. ratings.

The square port 427 was conservatively factory rated at 425 hp for starters, then went up from there. I ran a 440 in a street car in 72 that was a consistant 11.70 car, driven to work every day and 135 miles to the strip.
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Old 01-26-2004, 06:59 PM
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What is the recipe to make a 427 from a 454 block and 3.766 crank???? 454 pistons needed or 427?? Have any of you done this?
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Old 01-26-2004, 07:32 PM
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Blocks are the same, pistons crank and rods are different
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Old 01-26-2004, 07:39 PM
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you must use 427 pistons if you use stock rods, 454 pistons have a higher pin height to match the longer stroke
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Old 01-26-2004, 08:35 PM
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why destroke a motor?
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Old 01-26-2004, 10:23 PM
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Quote:
Originally posted by BLOWN 1100
Blocks are the same, pistons crank and rods are different

Rods are the same just the crank and pistons are different
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Old 01-27-2004, 04:39 AM
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why destroke a motor?
to run more rpm without excessive piston speeds. to stay witin regulations in a certain class of racing, To allow longer rods

If you had a cast crank 454, and stumbled onto a cheap steel 427 crank.... and so on
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Old 01-27-2004, 07:12 AM
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4.350" Bore x 3.75" stroke with a 6.535" rod and steel Heads.
810HP at 8200RPM. This is a common pull truck combo. With better then OEM heads more power can be obtained.

Chris
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