817Borla

iTrader: (5)

i measured my pushrond lenght with Comp Cams Adjustable Pushrod Checker
and got 7.362 intake and 7.382 exhaust with .075 preload. what size should i get?

vettenuts

iTrader: (4)

Curious on how you came up with those numbers?

If your measurements are correct, use 7.450" if stock lifters.

817Borla

iTrader: (5)

i used this guide
https://ls1tech.com/forums/7957678-post2.html

do the numbers sound wrong to you?maybe i did it wrong,
i have the polluter cam and PRC ls6 heads with ls7 lifters

817Borla

iTrader: (5)

any help????

vettenuts

iTrader: (4)

OK, just wanted to make sure you were counting turns and not measuring as the measurements are not the same. If you numbers above are as measured (not including preload), I would go 7.450" as previously suggested if you are running stock/Gm lifters.

willyfastz

Is the above measurements with preload or without?

PREDATOR-Z

If those measurements are correct, then 7.375 pushrod.
That will then give you:

7.375-7.362= .013 variance
add to .075 preload> .075+.013= .088 Intake preload

7.375-7.382= -(.007)
Add that to preload> .075 + (-.007)= .068 Exhaust preload

both fit in the desired range

Is this a cam only swap?

817Borla

iTrader: (5)

i think they are correct but ill double check, and its a H/C swap got the polluter cam

specs are 242/244, .610/.612 and the PRC Stage 1.0 LS6 CNC Ported Heads with PRC Double Spring Kit