In this case the longer pushrods basically keeps the stock preload on the lifters since the ls6 cam has a smaller base circle than a stock truck cam. One could get by with using the stock length pushrods, but as stated you would loose some lift, have less preload and may encounter more valvetrain noise.

 

So.....the rocker arms aren't adjustable? You can't adjust preload/clearance with a nut on top of the rocker arm? You just tighten the nuts that hold the rocker arms on the studs to a specific torque reading and you're good to go? No adjustment necessary?

 

No, the stock rocker arms are not adjustable. You just torque them to 18ft lbs. and you are done. You have to make up the difference in cam base circles by using longer pushrods or using after market adjustable rocker arms.

 

its 22 ft-lbs

 

Yeah, I couldn't remember exactly. I have adjustable rocker arms.

 

BTW it's actually 204 intake and 218 exhaust. I am not sure how much it helps on N/A maybe 30-40 fwhp I would guess. WJ Mark did it on his turbo truck and it gave him 50 rwhp. I never dyno'd mine so I don't really know... but I love it. Good luck!

 

just for a rough idea what kind of fuel ecomony are you guys getting with the cam?

 

does any body know if my 2003 has a fail safe mode that would make it not start after the cam is installed and thew truck is running.just wondering before i do this. And where should i send the computer for a good mail order tune

 

hey bro is it an ls6 or ls2 cam cus they have the exct same specs but the ls2 cams come from the newer ls2 the reason i replied is cus i just got an ls2 cam with the ls6 springs and ls2 pushrods for my 5.3 and i wanted to know if it can just be a swap or will i need to modify some parts

 

I too am wondering. If you were to use the ls6 cam, ls6 yellow springs and pushrods straight from a corvette valvetrain, would that make up the difference on our motors??