Pushrod Length Question
Thread Starter
Staging Lane
Joined: Sep 2004
Posts: 59
Likes: 0
From: arlington, wash
Pushrod Length Question 98 Ls1 with jesel shaft mount Non-Adjustable Sportsman rockers and cam.
I set the pushrod length checker to zero-lash on the base circle of the cam. The length of the checker is 7.2640 using digital calipers.
7.2640 + .060 = 7.324
Therefore I should be getting a set of 7.325 pushrods.
Is this correct? They are stock ls1 lifters and assuming preload to be .050 to .080 with .060 as ideal.
I tried running it with 7.4 pushrods, (told to do so by a shop) and it sounded terrible, as if the lifters were bottoming out.
I set the pushrod length checker to zero-lash on the base circle of the cam. The length of the checker is 7.2640 using digital calipers.
7.2640 + .060 = 7.324
Therefore I should be getting a set of 7.325 pushrods.
Is this correct? They are stock ls1 lifters and assuming preload to be .050 to .080 with .060 as ideal.
I tried running it with 7.4 pushrods, (told to do so by a shop) and it sounded terrible, as if the lifters were bottoming out.
Remember when you're ordering MOST brands of pushrods, you are ordering a gauge length. Gauge length with the 5/15" ball-end is about .020" shorter than your tip to tip length. So subtract the .020", then add your preload. I'd go with 7.300" based on your tip to tip measurement.
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Thread Starter
Staging Lane
Joined: Sep 2004
Posts: 59
Likes: 0
From: arlington, wash
Remember when you're ordering MOST brands of pushrods, you are ordering a gauge length. Gauge length with the 5/15" ball-end is about .020" shorter than your tip to tip length. So subtract the .020", then add your preload. I'd go with 7.300" based on your tip to tip measurement.
The Comp Cam Hi Tech measures in Gauge length (If you use the lines).
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Exactly, not ALL pushrods are ordered by gauge length, but many are. You have to check with them.
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
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