65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 05-17-2002 02:14 AM
   
...with ported stock heads and 9.54:1 compression, what kind of power would a 331 with AFR 185's and 10.5:1 make with a solid roller cam of similar or bigger specs? This assumes the rest of the 331 is basically the same as the 302, with appropriate changes in carb size, etc.------------------
1965 Coupe, Tremec 3550, Steeda Tri-Ax, Cable Clutch conversion, 9" N case, 4.11's, Detroit Soft Locker, 31 spline Moser axles, Daytona pinion support,, Biondo Line Lock, Ford XB3 longblock, x303 heads, B-Cam, 9:1 comp., Tri-y headers, cut-outs, Ford Racing high-torque mini-starter, Pertronix Ignitor & Flamethrower coil, 650 double pumper, Edelbrock RPM intake, K&N air, Holley electric fuel pump & AFPR, dual 2-chamber Flowmasters, Summit 3-way fronts, Rancho 5-way rears, 5-leaf springs, Chrome Export Brace, Griffen Radiator, Comp. Eng. subs. [email protected] w/ a 1.837 60'
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bluestreek
Gearhead Posts: 1724
From: Athens,GA
Registered: Jul 2001
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posted 05-17-2002 11:56 AM
That's what I was thinking when I read the Sherman article. There was no way that you would have only 9.5:1 compression when using 54cc heads, flattops, and .005 deck height!! I did the same build-up about 8 yrs ago and only netted 375 HP. Sherman must have done some extensive work on the heads and intake to get 400 HP. Those pistons don't hold up very well either. After the engine got noisy fairly quick, I tore it down and found 4 pistons that were cracked and one had a piece of skirt broken off. 289/302 engines are hard enough on pistons without putting them in backwards. 
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