how do i figure the lift on a cam i just took out of my engine. i took the base circle measurment from the lobe measurment times the rocker ratio. correct? it's a big block solid lifter cam and by my measurment only has 3/8" lift. am i doing this right?
thanks john

not a guru answer, but yes, .375 X 1.75 = ?

Eyp, you gotit, so 3/8" = .375 * 1.72 (stock length) = .645". That's a pretty big lift number!

Bill C.

actually the difference was .22X1.7 ratio gives me .374 lift. but at least i'm glad i figured out how to do it.
thanks, i'm really looking forward to the new cam. harold suggested it to me (udharold) and it should wake this puppy up. according to my desk top dyno the fly wheel number is 580 and on a 4 sp. i'll be pushing close to 500 ponies. thank you guys again for all the help.
john aka BadPapa graemlins/beers.gif

John, I think you may be measuring it wrong?? But I dont know, do you have it set up on centers? Thats probably the only way to do it right, on centers with a 0-1" dial indicator to measure "runout" or lobe lift. See, I shoulda let the guru answer, he woulda caught the measuremnet error and suggested a technique not involving centers and a dial.

gene i'm sure your right. i just measured the diameter (basline) of the cam then the diameter at the peak of the lobe. the measurements were 1.38 and 1.60 respectively. difference being .22. i then multiplied that by 1.7 rocker ratio to get .374 for a final result. i don't know any way that i could get it mounted on centers. it's just curiousity anyway. i had a couple lifters that were worn pretty badly. the car was noisey and didn't run very good. the previous owner had them tightened down way too much..
thanks again. john
ps gene was it you that i was emailing back and forth about the vibration problem a year or so ago. if so i think i may have got it fixed.