OK, so here is the deal. I bought a Lingenfelter GT2-3 cam for my LS1. I have researched the base circle dimensions of my cam (19.7mm) the 02+ LS6 cam (19.0mm - which uses the .6mm or .023622" longer valves to compensate) and my cam--by measurement (18.75mm). My head tells me that since I'm using the shorter valves and a smaller base circle cam I should buy pushrods that are .025" longer than stock. Stock length is 7.400".

Does anyone have experience with this? I called Lingenfelter and they tell me that I'll be fine using the stock 7.400s but I noticed that a lot of the truck guys are saying that they get clacking....which I definitely don't want...now or 10,000 miles from now. .025" isn't that much longer and I plan on buying hardened pushrods anyway, so I'm leaning toward buying 7.425" pushrods.....

Your comments are welcome and appreciated!

Ray

 

Yeah 7.425s will work real well

 

pull a pushrod and measure it with a micrometer. I believe that the actual length is 7.385 in. In which case you would want a 7.410 in. If you can't find ones that length then 7.400 would be fine. Unless my math is completely wrong...

 

Actualy stock p-rods I've measured averaged 7.9x

 

really?? Then why do vendors sell 7.400s as stock? I'd think that a half of an inch in the valve train is no small matter.

 

.5 inch ???

 

7.900? this must be including the ball ends which as I understand it is NOT how they actually measure them..

Ray

 

pushrods are measured by guage lenght not OAL

 

OOOOOOps major typo guys, I meant 7.39x

 

Gotcha predatorz! So what does everyone think? 7.425"?

I'm still leaning that way unless someone gives me major reason for changing my mind......

Ray

 

Another way is use 7.400 and a .040 Cometic.
Better quench and SCR/DCR boost
A bit more work and a few $$ but well worth it.

 

I gave that a lot of thought. Ended up buying the GM MLS gasket. I have heard too many problems with the Cometics....Not to mention the price! People really love those or hate those. I have heard of too many coolant leaks due to stamping problems.

Ray