Constrictor 98TA

Lets say I had a cam that had valve events of:

Intake Valve opens - IVO 4 BTDC
Intake Valve closes - IVC 44 ABDC
Exhaust Valve Opens - EVO 46 BBDC
Exhaust Valve Closes - EVC -2 ATDC
Overlap 2 degrees

Now, lets say I know I am running .020" milled heads and I know my intake valve P/V clearance is tight, however I have plenty of clearance on the exhaust side.

So, I switch to a cam with these valve events:

Intake Valve opens - IVO 4 BTDC
Intake Valve closes - IVC 48 ABDC
Exhaust Valve Opens - EVO 56 BBDC
Exhaust Valve Closes - EVC 0 ATDC
Overalap 4 degrees

The Intake valve closing and exhaust valve opening would have no bearing in P/V clearance, but I am staying at the exact same intake valve opening position, and the exhaust valve closes 2 degree later than the original cam.

In theory, I shouldnt have any problems with P/V clearance, regardless of what the actual specs of the cam are....correct?

Mike22ca

iTrader: (7)

I can point u to the right person to talk to. His name is Shaun (93pony). He's on here & cafords.com a lot. He is "Mr. Valve Events" LOL

Constrictor 98TA

Thanks for the advice. I PMed 93pony, but does anyone else have any thoughts?

Richard@WCCH

iTrader: (3)

It should work fine as long as the lift/degree ratio stays the same as the old intake lobe. Essentially you've switched to a longer duration and moved the centers apart. Should make for some great midrange and topend power. Acceleration suffers slightly.

Good luck,
Richard

Constrictor 98TA

Thank you Richard!