Author Topic: 455 motor input  (Read 661 times)

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Offline Mac6539

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455 motor input
« on: November 29, 2018, 08:13:13 PM »
I have a 74 pony 455 standard bore, pistons and non decked block. 46 6h heads, xe268 cam, edelbrock performer intake with edelbrock 750 carb,roller rockers and headman headers with th400 and 3.73 posi in a 77 T/A. It goes but i was really expecting more . No i have not dyno it nor been on the track. Any suggestions?

Offline 72blackbird

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Re: 455 motor input
« Reply #1 on: November 30, 2018, 08:40:13 PM »
The 1.96/1.66 valves are limiting flow into your engine, and power as well. Your cam is also a bit conservative for a 9:1 455. I would have 2.11/1.77 valves installed, or find some 6x-8s, which already have bigger valves and screw in studs. Going to an XE 274H will also help fill the cylinders better.

Geno