What is camshaft duration and lift?
What is camshaft duration and lift?
Duration is how long the valve is off its seat. It is listed in degrees of crankshaft rotation. When someone refers to a “big cam,” they mean it has longer duration, not higher Lift. Advertised Duration is the degrees of crankshaft rotation that the lifter is raised more than a predetermined amount.
Will a 351W cam work in a 351C?
You can run a 302 or a 351W cam in both of them. BUT, the firing order will be different between the 302 [non HO] and 351W.
Will a 351W CAM work in a 302?
a 351 Windsor cam will work in a 302 Windsor block, but you will have to use the 351 firing order which is different than the 302.
What are the lift specs for a 1970 351C Cam?
The duration specs at 0.050″ lift for those reproduction cams are 206/220 for the Lunati version, 206/221 for the Crane Cams version. That’s probably about as close as you’re going to get in finding a 0.050″ lift duration spec for something close to the ’70/’71 oem camshaft.
How many horsepower does a Boss 351 camshaft have?
This camshaft was rated by Ford for 50 additional horsepower over the M code camshaft, 21 additional horsepower over the Q code camshaft, and 7 additional horsepower over the Boss 351 solid tappet camshaft. Described as having a good idle with lope, and good low to mid-rpm torque. This cam does not have as much high rpm pull as the 505 cam.
What should the stock cam settings be on a 351W?
Those both list a mild rough idle. I’d expect the first cam to idle only slightly mild rough and the second cam to idle just about stock smooth in a 351W. Also, both of them list required valve springs that should fit your cylinder heads. Comp also has their online Camquest utility to assist in cam selection.
Where can I find the Ford 351 Cleveland camshaft guide?
Follow the cam manufacturer recommendations and you will be pleased with the result most of the time. This Tech Tip is From the Full Book, FORD 351 CLEVELAND ENGINES: HOW TO BUILD FOR MAX PERFORMANCE. For a comprehensive guide on this entire subject you can visit this link:
The duration specs at 0.050″ lift for those reproduction cams are 206/220 for the Lunati version, 206/221 for the Crane Cams version. That’s probably about as close as you’re going to get in finding a 0.050″ lift duration spec for something close to the ’70/’71 oem camshaft.
This camshaft was rated by Ford for 50 additional horsepower over the M code camshaft, 21 additional horsepower over the Q code camshaft, and 7 additional horsepower over the Boss 351 solid tappet camshaft. Described as having a good idle with lope, and good low to mid-rpm torque. This cam does not have as much high rpm pull as the 505 cam.
Those both list a mild rough idle. I’d expect the first cam to idle only slightly mild rough and the second cam to idle just about stock smooth in a 351W. Also, both of them list required valve springs that should fit your cylinder heads. Comp also has their online Camquest utility to assist in cam selection.
Follow the cam manufacturer recommendations and you will be pleased with the result most of the time. This Tech Tip is From the Full Book, FORD 351 CLEVELAND ENGINES: HOW TO BUILD FOR MAX PERFORMANCE. For a comprehensive guide on this entire subject you can visit this link:
