pushrod length
Restricted User
Joined: Jun 2003
Posts: 588
Likes: 0
Make sure you're on the base circle of the cam. Torque the rocker to 22ftlb with the pushrod checker in the hole but not touching the rocker. Then turn the pushrod until your at zero lash. Remove the rocker, remove the pushrod and measure it with a dial caliper. If the measurement is 7.300 just add .020 to ,050 to it for the pushrod length you need to order.
Because it is not correct although it seems to be the answer you are looking for. Do yourself a favor and check the length. You have the tool to do it properly. There are alot of great suggestions made here imparticular are posts number 12 and 22
I run the 7.425s in mine and it puts me up about to .080 preload. It does have some sewing machine sound but not bad at all. Since you are at 7.350 at Zero lash if you add .050 preload you would need 7.4 but that wasn't enough for me so that's why I bumped my preload to .080. So if you are using the 7.425s then you are just about .070 preload, that should be perfect. Mine had to run for 30 min. or more to quiet down.
Last edited by mvvette97; May 23, 2009 at 11:57 PM.
I am running 7.45 pushrods that were recommended with my cam spec sheet....
I know i should have checked them... but my car is loud as hell!
my wipe pattern is way at the bottom of the exhaust side...how do i get it centered??
I know i should have checked them... but my car is loud as hell!
my wipe pattern is way at the bottom of the exhaust side...how do i get it centered??
hmm. now you got me wondering.
This is what I am putting on, haven't yet.
LS1, 241 heads milled 0.015, torquerV2 cam, LS7 lifters, chromolly 7.400 push rods.
I am hoping these aren't too long. Ive been told I will be fine, but theirs always that shade of doubt you know.
This is what I am putting on, haven't yet.
LS1, 241 heads milled 0.015, torquerV2 cam, LS7 lifters, chromolly 7.400 push rods.
I am hoping these aren't too long. Ive been told I will be fine, but theirs always that shade of doubt you know.
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Brett Foote Im gonna buy a pushrod length checker! Kinda freaking out now! lol, i just went with what was recommended with my cam.....
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
If the pushrods are much too long (long enough to bottom the lifter plunger) than you can hold the valves open and skew the wipe pattern. If this is not the case, then the way to adjust the wipe pattern is by moving the pivot point of the rockers up and down (assuming stock rockers or fixed rockers like the Yella Terra's). Since you are too far to the exhaust side, the rockers need to come down in height. You need to verify everything first, then decide on the corrective action to take. If you are using stock rockers, you can play with shims (need to be careful to ensure alignment is kept during the checking) to find the correct rocker height.
hmm, dang. I think my builder ordered 7.4 pushrods from TSP. He said he would check with them first to make sure knowing that I was milling the heads 0.015.
I guess I will find out what he ordered when the order shows up, hopefully this week. In the meantime I need to find a pushrod checker to measure them before I install.
Thanks for the info.
I guess I will find out what he ordered when the order shows up, hopefully this week. In the meantime I need to find a pushrod checker to measure them before I install.
Thanks for the info.
i am running a comp cam. my stock pushrods are allowing about .050 to .070 play between the rocker and the valve. so i need to go longer pushrod, but after reading how everyone is going with a shorter pushrod. i want to know what i'm doing wrong.
i was told the comp cam is a small circle based cam. i will check it with a length checker before i order pushrods. but whats ya'lls opinion on that
i was told the comp cam is a small circle based cam. i will check it with a length checker before i order pushrods. but whats ya'lls opinion on that
Last edited by 6.0mustang; Jun 6, 2009 at 08:17 PM.
i am running a comp cam. my stock pushrods are allowing about .50 to .70 play between the rocker and the valve. so i need to go longer pushrod, but after reading how everyone is going with a shorter pushrod. i want to know what i'm doing wrong.
i was told the comp cam is a small circle based cam. i will check it with a length checker before i order pushrods. but whats ya'lls opinion on that
i was told the comp cam is a small circle based cam. i will check it with a length checker before i order pushrods. but whats ya'lls opinion on that
You guys make it so difficult. All you do is tighten from 0 lash to 22lb ft, and it should take 1 to 1 1/4 turns [,040-.050] and you are good to go. Then if you wipe is off the rocker will have to be shimmed.
