I'm trying to figure out what length pushrods to use and I wanted some opinions on the method I'm planning to use. I figure I'll take a micrometer to the stock cam's base circle, then do the same to my comp cam. I'll compare the measurements and hopefully be able to determine the proper length pushrods from there. What do you guys think? Could this yield the proper length pushrods or am I just crazy?
~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~
Why not just call the manufacturer of the cam and ask?
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
plumbed incorrectly? 3/8" side should be from the pump and 5/16" is return to the tank.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Wrong thread Greggo.Originally Posted by RedHeartbeat
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
damn links!
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Way ahead of you. I already called them and asked. They don't know and said it's because the base circles are all different
~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~
Good call... doesn't make sense though. If the base circle is different on all their cams with the same grind... that's no bueno.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
No kidding. According to Comp Cams, the biggest reason different length pushrods are usually needed with a different cam is because the base circles are rarely the same as stock. Hence the reason so many people use different length pushrods with big cams or adjustable rockers. It sucks ya, but the engine is still getting built so I still have some time to figure this one out. Still, am I on the right track with measuring the base circles?
~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~
If it's the cam you bought from me, it jives with stock length pushrods.
2006 SilveradoLittle Black Bitch
The base circles vary due to lift and duration. They can only cut a lobe so tall before it will not be able to fit through the bearing bores so they get the height of the lift by reducing the base circle.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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