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The 12° homegrown C4s on my 394 are pushing the stock block hard, it hits 7000 easy

May 17 2017 at 4:46 PM
Bill Ballinger  (Login 65billgal)

Response to Perry, what size intake valve would you recommend for Bill? n/m

That is my dilema. I don't want to waste the BBMs, so I would like a 429.88 inch version of my 394, a solid 7000 rpm 550-600 hp engine. I am afraid 700 hp and 550 ft lbs is a lot to ask from a 390 based block. My C4AE-Gs with the X factor they have are close to enough to split the block. A tell-tale tach on my truck had me hitting 7450 in a mud drag and put a 454 Chevy to bed. Its capable, but Billy drove it and said it was spooky in the car. I wish I could afford a BBM block, or a used tricked out 428 one to live with 700 hp and a 7200 redline, I love rpms! I have a 3.98 stroke crank that can be turned down to a 4.09 2.2 journal.

That is my problem, a hyd roller 7000 rpm wailer of 430 ci. The heads with 2.2/1.68's in a 4.09 bore would do it. I have the cam. the intake to convert to EFI, a killer exhaust 2 inch Crites headers and a 3 inch X pipe. Thats what I want to do with them, 5/16 valves even...

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