Pushrods & lifters???
Pushrods & lifters??? Witch is the best pushrods and lifters to use with the GM 350 hot cam kit? I was thinking about the GM lifters #12371042 and GM pushrods #12371041. Would this be a good setup or would I need to go with somthing else?
TECH Apprentice
Joined: Feb 2005
Posts: 384
Likes: 0
----------------
1) To the OP, I'm not sure where you got those part numbers. As far as I can ascertain, those pushrods are 7.178" in length and non-hardened. Those are not ideal. Factory pushrods are 7.200", so the missing ~22 thousandths might have a minor effect on rocker geometry. If you're going to spend the money might as well at least get hardened steel.
Standard $40 hardened pushrods from Comp will do just fine -- I ran the hotcam that way for 3 or 4 years (with stronger valvesprings). If you've a 1994-1995, look for a dimple along the shank of your factory pushrods -- they may be hardened from factory. You can test for straightness on a glass table + a flashlight. If they're straight, reuse them.
2) If your factory lifters aren't in too bad of shape, they can be reused, though it is not a horrible idea to replace them (as they've been worn into the old camshaft).
The lifter part number you listed is actually for a full kit with link-bars/spider retainer and whatnot, which is unnecessary unless you're missing those parts. Otherwise, the kit looks like it'll work just fine. The lifter part number alone appears to be 17120735, if you want to order the lifters separately.
Standard $40 hardened pushrods from Comp will do just fine -- I ran the hotcam that way for 3 or 4 years (with stronger valvesprings).
Do you know the part # for those. Is it 249-7808-16?
Do you know the part # for those. Is it 249-7808-16?
TECH Apprentice
Joined: Feb 2005
Posts: 384
Likes: 0
I'm sorry, I don't recall the exact part number I used. However, those you listed will work just fine. Hardened, 5/16" diameter, ~7.200" length (within five thousandths anyway). ***[Edit] -- This is assuming you'll be running a factory setup. If you mill the heads or deck the block, you'll need to order different length pushrods to correct for shifts in valvetrain geometry. This is done by use of a pushrod-length checker tool.
To clarify my previous statement, the chrome-moly pushrods will of course work if you want to go that route -- they are very high quality (lightweight and virtually indestructible). It's just that they are expensive and ("arguably") overkill for your intended setup. I'm using a set of CCA-7935-16 pushrods on a .660" lift solid roller camshaft, and they are holding up great.
Your choice.
To clarify my previous statement, the chrome-moly pushrods will of course work if you want to go that route -- they are very high quality (lightweight and virtually indestructible). It's just that they are expensive and ("arguably") overkill for your intended setup. I'm using a set of CCA-7935-16 pushrods on a .660" lift solid roller camshaft, and they are holding up great.
Your choice.
Last edited by Alex94TAGT; Dec 21, 2007 at 10:54 PM.
