Stock pushrod length?
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 4,711
Likes: 3
From: Middle of No where AK
Stock pushrod length?
What is the stock pushrod lenght for the ls2? I ordered a new set from comp but I think they sent me the wrong lenght. Im putting a bigger cam in 230/232 with a set of trick flow 225 heads. I was pretty sure the stock lenght would work with this set up so thats what I ordered but I forgot what length they were supposed to be. Please help me again.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Stock is 7.4" but I dont think trick flows use the stock length. Further, bigger cams have smaller base circles and thus need longer pushrods if heads are stock deck thickness. Milled heads and thinner gaskets make the rod requirement longer. Since trick flows tend to be used with aftermarket rockers, that may affect the final length.
Valvetrain geometry isnt the area to be guessing. Get an adjustable pushrod and check the exact length by finding zero lash and then adding to that length the amount of preload for your lifter of choice.
Option 2 since most DIY wont spend the money for these little things is to call the head manufacturer who may make a recomendation based upon experience.
Valvetrain geometry isnt the area to be guessing. Get an adjustable pushrod and check the exact length by finding zero lash and then adding to that length the amount of preload for your lifter of choice.
Option 2 since most DIY wont spend the money for these little things is to call the head manufacturer who may make a recomendation based upon experience.
Last edited by SpinMonster; Sep 26, 2008 at 01:18 AM.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Not sure where you got 7.25......if I typed it, I left out the '4'. 7.425.
If that is in a thread let me know where so people dont buy the wrong rods.
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 852
From: Daytona Beach FL
Of course Spin is absolutely correct!!
Here's a .pdf excerpt of the Comp Cams catalog:
http://www.competitioncams.com/techn...07/248-265.pdf
If that .pdf link won't work try:
http://www.competitioncams.com/Techn...urrentCatalog/
and click of "pushrods" in the index.
Take a look at page 249 for some nice "length checker" pushrods.
On page 254 they show their model# 7955 as the stock length for the LS2 at 7.4 inches.
Bob
Here's a .pdf excerpt of the Comp Cams catalog:
http://www.competitioncams.com/techn...07/248-265.pdf
If that .pdf link won't work try:
http://www.competitioncams.com/Techn...urrentCatalog/
and click of "pushrods" in the index.
Take a look at page 249 for some nice "length checker" pushrods.
On page 254 they show their model# 7955 as the stock length for the LS2 at 7.4 inches.
Bob
Last edited by BEZ06; Sep 26, 2008 at 10:17 AM.
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