ArrestMeRed99Z28

iTrader: (1)

I did a search and found that the stock cam base circle is .7760 in and the cam i will be running, on XE-R lobes is .7285 in. I also found that the stock pushrod length is 7.385, and I have a set of 7.400 hardened pushrods. So the difference in base circles is .0475 in. So the ideal pushrods would be stock size + difference in base circle which is 7.4325. So my push rods are .0325 in short correct? and is this exceptable? This is my first cam swap and i want to do it myself and do it right! Thanks in advance.
AJ

ArrestMeRed99Z28

iTrader: (1)

I realize that this is only 13/400ths of an in and it's probably fine, but better same than sorry so I thought I would ask.

ArrestMeRed99Z28

iTrader: (1)

23 views and no answers, for those of you running a cam with a smaller base circle, different gasket thickness, and/or milled heads, what sort of tollerance between ideal and actual push rod size did you use? Any problems? excess noise from the valve train? I know the stiffer springs will make more noise and have heard enough cammed LS1s in person to know what they should sound like, I just don't want to worry about it to much when i put it together.

1989GTA

It's a gamble to estimate a pushrod that way. The best way is to purchase an adjustable pushrod checker to get the correct measurement to insure the right geometry. They are cheap enough to purchase.

Nemo02Z

I dont know if this is what you are looking for, but I hope it helps....

https://ls1tech.com/forums/generation-iii-internal-engine/327734-cam-guide.html

Go down to the bottom of the thread could have the information you are looking for..