1.72 Roller Rocker Questions

Not sure how much additional lift the bigger ratio roller rockers give you exactly...but I think my B-303 cam has something like a .494 lift. The 1.72 rollers I installed brought it up to a .512 lift I believe. As far as I know, the bigger rockers will not increase your duration...just the lift. As for what's the difference between 1.7 & 1.72 rockers...I would say next to nothing. The difference would be very minimal being that they are only .02 inches longer. I guess the 1.72 rockers might give you 1-3 thousandths more lift, lol. The increase in lift #s that I listed may be a little off...but I'm sure someone else will chime in with better specifics.

[83GTMUSTANG]

A B Cam Has .480 In. Lift W/ 1.6's .510 W/ 1.7's 1.7's Give You .30 In. Lift Extra To Your Cam But What About 1.72's

Originally Posted by 83GTMUSTANG

A B Cam Has .480 In. Lift W/ 1.6's .510 W/ 1.7's 1.7's Give You .30 In. Lift Extra To Your Cam But What About 1.72's

Ok, that makes more sense. Because I thought that my pedestal mount 1.72 rockers I had on my stock motor brought the stock lift of .444 up to something like .477. You're talking about a few thousandths more with 1.72 vs. 1.70s. It's hardly worth figuring it out. I don't know the exact formula but I'd imagine the 1.72s raise the lift something like .32-.34. I'd go for the 1.72s.