BORE SHROUDING TEST: 4.03" vs 3.91" Edelbrock RPM Heads Really Fit a 318? Project Mission Impossible

toolmanmike said

Now that's something I haven't seen a video test comparison done on. I am sure flow out performs compression. But by how much? :lol:

Click to expand...

FWIW: NASCAR tested low compression in the Truck Series years ago. I believe the Ram was running W5 Cylinder Heads.

"Both employ carbureted 358-cubic-inch pushrod V-8s, but in presaging Winston Cup rules, truck compression ratios are limited to 9.5:1, slicing 60 horsepower from Cup cars' 720."