mild 351w build-up

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Oct 28, 2006 | 09:08 PM

onefiftynut90

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Joined: Sep 2004

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mild 351w build-up

hello I have a 1986 f250 HD (8600 gvwr) w/ 351w (H.O. 4 bbl)
I think is is about 220 hp stock
I am in the process of rebuilding the motor and have instaled a re-ring kit.
I plan on using these parts to help build-up the power.
-Ford racing gt-40 aluminum heads, 64cc chamber, 160 cc intake
-Headman Full length headers
-Edelbrock performer dual-plane intake
-Holy 600cfm square bore carb
-Comp Cam 4x4 energy 250/258 duration, .448/.483 lift

I dont know if it matters but, I plan on removing everything that isnt nessary

my question is, what kind of hp/torque numbers can i expect?

Oct 29, 2006 | 11:31 AM

baddad457

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Joined: May 2003

Posts: 11,141

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From: south louisiana

For starters, instead of going with the Performer intake, step up to an RPM intake. The Performer is basically a cloned stock 351W 4 bbl intake. Not worth the purchase price when you already have the stock 4 bbl intake. The RPM will give you the same bottom end performance plus give it a bump in the upper rpms. I'd also go with 58 cc chambered heads over the 64's. That will give the compression a boost to offset the increased cam overlap.

Oct 30, 2006 | 10:42 AM

Kemicalburns

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Joined: Jul 2002

Posts: 14,285

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From: Bend,OR

yea go 58cc, the aluminum heads allow for a bit higher compression with out detonation. so you could run a 9.5-1 more then likly and still run 87 octane fuel.