quote:
Originally posted by Wes Jones:
I don't believe the heads are the ones you are talking about. these heads have stock locations fot the intake and exhaust ports. the reason I needed longer valves is because the installed spring height was at 1.800 and I needed 1.900 for my springs. I have a mechanical roller with 6.500 net lift. The guide plates are stock items, the pushrods came out to be 8.450. the studs were from comp cams, they needed to be shortned .500 to all the lock nut to work correctly.These heads have a 60cc closed chamber. the ports have been reshaped, but still in the stock location.I put these on a 383 stroker block with 18cc dish pistons, 9.85cr. The piston to valve clearence was .185 on the intake and more on the exhaust. I started the engine on a stand today, will be at the dyno on the 31st or march.
The dyno session went well. The 383 ci cleveland produced 509hp at 6100rpm. The torque curve wasn't much of a curve at all it was at 400 to 470 from 3500 to 6100rpm.The dyno guy said that he doesn't see many 500hp small blocks with unported heads and pump gas.The total ignition timing was at 34 degrees which he said means the combustion chamber is designed very good . I am very happy with these heads, e-mail me if you have any questions.