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Old 09-02-2020, 12:36 PM
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steve25 steve25 is offline
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You will need 290 cfm to hit that 600 hp target, not 315 so that makes the port work needed a tad easier.

With iron D ports that I ported to 280 cfm for a 10.75 comp 400 I have made a dynoed 580 hp, so 600 hp with 290 cfm and the far bigger port volume of the E heads should be cake!

Basically all you should need to do porting work wise with those is to do a light bowl blend job, cut back the head bolt boss that sticks out into each runner by 1/2 of what's there now, and raise the roof from above the crown of the short turn by .045 and then blend that to a RA4 gasket height at the flange.

The wild card here is the air flow limit of the rpm Intake.

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