taws6m6

iTrader: (37)

I borrowed one from a friend. I went to the site to get the instructions and its based solely on wipe pattern? Then I add preload to that? I have a 2003 LQ4, stock heads, LS9 head gaskets, Manley duals and a custom grind comp blower cam I got from a member on here, and I am unsure of the base circle of the cam. It doesnt say anything on the instructions about doing the measuring from the turns of the checker. I am not to excited about doing this on wipe pattern. Has anyone used this?

01ssreda4

iTrader: (96)

typical base circle on a stock cam is about 1.53. Base circle on all aftermarket cams I have seen has been about 1.48. About 0.050 smaller for non-stock cams. I measured for my pushrods today using the adjustable checker. Call me if you have any issues, I got it figured out

Paul57

From this information, does this mean a set of heads could be milled .025 and the pushrod length would be "dead on"...or doesn't it work like that???

taws6m6

iTrader: (37)

I didnt like the trickflow checker, never used it. I ordered the comp cams checker that 99.98% of the people use on here. After using it now I know why

01ssreda4

iTrader: (96)

Yes it appears that with stock cams diameter being .05 smaller then a .025 longer pushrod is in order, if you milled the heads .025, then stock length pushrods should be dead on. Not stock pushrods, stock length pushrods.

vettenuts

iTrader: (4)

Sounds like the instructions are for a stud mounted setup. Pushrod length won't set the wipe pattern. Set that with shims then measure for pushrod length. Don't use the instructions on a shaft system such as the LS1 rocker.