Reply to "CLEVOR IS THE WAY TO GO!"

The engine masters challenge was set at 434 cubic inches this year & 10.0:1 compression ratio. Entries could be small blocks or big blocks.

Scott Johnson of reincarnation high performance, a member of 3rd place team #37 had this to say:

"This contest ended up being about matching appropriate intake port cross section, velocity and good charge motion past the intake valve and nothing more. The big block combos made better peak HP but fell way short on torque and average numbers because the intake ports available for the big blocks are unsuitable for the 434 inch displacement. Also of importance was the ability to maintain good VE at the top with the small ports. My intake ports were only 225 CC's finished with minimal increase in minimum cross sectional area.

We made a best peak HP of 689 HP at 6,400 RPM and 631 pound feet of torque at 4,900 carrying over 600 pounds from 4400 to 5900 RPM. Our HP peak carried for many hundred RPM past the peak which varied from 6,200 to 6,500 depending on the tune and pull.

The inline small block heads just dont seem the be able to flow the numbers of the chi heads and still have good port velocity. I suppose that is why many did not even bother showing up. It is rumored that many did not show because of disappointing results."

5 of the top 6 finishers entered CHI headed (Cleveland style canted valve heads) Windsor motors, aka Clevors. The only non-Clevor entry among the top 6 was Jon Kaase, finishing second place with a big block Pontiac.

What I want to point out is..... where's the small block Chevys? Where's the big block Chevys? Mopars? Big block Fords?

5 out of the 6 top finishers were running Cleveland heads. Heads whose design is about 38 years old. CHI, raised small port Cleveland heads (aka 3V). Feeding 434 cubic inch motors. The top entry made 714 bhp with these heads.

Long Live The Cleveland