Hey there guys,

I am finishing up my cam/Al heads install tonight and I am wondering how long until my stock lifters blow up. I have the crane version of the GM 846. 222/230 @.050 -> .544/.564 w/1.6's. Should I back off the rockers to 1.5's? Any input?
Are any CC306 guys running stock lifter with 1.6's?

Thanks a lot,
Matt

 

Im running a bigger cam than that and the 306 with 1.6 rockers, and stock lifters. When i did the cam swap i just made sure they all looked ok, they had 65k on them, looked great, and didnt replace them. So far so good.

 

atljar,
Thanks for the reply. I am just really apprehensive about all that spring pressure (CM612K->~340lbs fully open) crushing my stock lifters. It sounds like you have a more aggressive setup than I and have had no problems. I hope that is the case for me as well. Thanks again,
Matt

 

Same here, except I'm still running stock 1.5 rocker arms. I had 35k on my stock lifters and they were in pristine condition. Decided to save some money and send the Crane lifters I had back. 6k miles later, no problems.

I'm running Crane 99893 springs, which have 405 pounds fully open. At least thats what the site says.

 

When I did my CC305 cam ( not a big cam at all) I reused my stock lifters which were in good shape. I got less than 200 miles out of my car before they collapsed. My lifters had 67,000 on them.

 

i have comp OEM replacements. I would of gone with the comp R's but this was during the shortage of them.

 

I have about 16000miles on a set of stock replacement lifters. Federal Mogul, 108$ About 10000 miles of which were with a ZZ409 cam and the rest with the GM847 cam which is a little bigger than the CC306 in lift and duration. So far no problems.

 

Everything is together, the car runs great. Thank you guys for all the information; I will keep the lifters in mind in case something goes wrong.

Matt

 

my stock lifters looked AWESOME.. too bad they gernaded after about 30 miles of EASY driving
Got some Comp R's in there now... Love em to death

 

.539/558(not sure if that qualifies as big) lift and an afr rev kit, I rev to 6,100 and have had no problems, except blown 4l60e's