[AusFordParts]

Originally Posted by blykins

I think the advantage of the CHI heads is that the port velocity is so high. Sure, anyone can make 600hp with 340ci and a big cam, but making that much power and having the torque to back it up is a different scenario.

CHI has several dyno charts and magazine articles showing 408's Clevelands and Clevors that make 650hp up top, and are still making 500 lb-ft at 2500 rpm. The 3V port is an awesome middle ground.

I think that's the reason why CHI is the choice for all the Engine Masters Competitions....a broad torque curve is what it takes to win there, and that's what it takes to get a thrill in a street car.

Funny, the Edelbrock heads fell short of the 600hp mark by about 130hp
The AFD 2v heads have seen +740HP@6800 & +600lbs from 5000 to 6100rpm, +500lbs@4100 where the chart begins. As seen on AFD's dyno section on their website
That was with only 393ci Cleveland built for a race 1/4 miles back to back in the real world as uposed to the dyno queens we see in EMC.
The aforementioned AFD 2v heads were the early series heads first produced by AFD. This engine was built by one of Australia's most reputable racer/engine builders & has made many passes in competition.

nuff said.

cheers
Lawrence