I'm going to build a smooth idle 427 and drag test it

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I'm going to build a smooth idle 427 and drag test it

02-02-2021, 11:08 PM

HP HUNTER

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Join Date: Feb 2012

Location: Colorado Springs Colorado/Thousand Oaks Ca

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Re: I'm going to build a smooth idle 427 and drag test it

Quote:

Originally Posted by Paul Precht

What type of block and what was it honed on, can you list the head flow.

959 production 454 block
280 grit hone, looks funny wet with hone oil

820 head castings, SF 600 4.350 bore @ 28 inches, Intake flow

.200 156
.300 225
.400 276
.460 292
.500 301
.550 312

The 820 casting is down on flow compared to other GM oval port castings, but I had them so they were used.

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Last edited by HP HUNTER; 02-02-2021 at 11:17 PM.

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killintime6968, Paul Precht, Scott Meier

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