[69vette427]

rebuilding a 427. Putting comp cam 11-209-3 in it. It has a 501/531 lift . What would be the advantage or disadvantage of using 1.8 rockers ?:crazy:

 

[vette427-sbc]

you would have to check piston clearance- if you know what the max lift you can use on your motor, you can use a formula to find the lift you will get. (lift is measured with 1.5 rockers so try to figure out what the lift would be with 1.8) otherwise you will probably have to find different length pushrods and maybe cut the pistons for clearance.

btw, im in the Sea bright, longbranch area- hope to see you at some of the car shows coming up

 

[Raccerx67]

I could always be wrong but from everything I have ever dealt with on the BB the stock rocker arm ratio is 1.7 and the SB are 1.5

Otherwise I agree with whats been said.

edit: here is a link with some great reading on rocker arm geometry and ratios....
http://www.compcams.com/Community/Articles/Details.asp?ID=-1966802678

 

[Paranoid]

Skip the rockers, I would get a bigger cam.