pushrod length
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Instructor
Joined: May 2010
Posts: 101
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pushrod length
I just purchased a set of LS6 2002 Z06 heads with the sodium filled valves. I'm having them ported right now. I'm installing them on my 98 c5 with it's stock cam (for now). I know my cam has a larger base circle, and that the valves are a little longer. What length pushrods would I need with my stock ls1 (98) cam? Later, I will probably put in the stock Z cam (02-04) and have to change pushrod length again. But, for now, what length?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I just purchased a set of LS6 2002 Z06 heads with the sodium filled valves. I'm having them ported right now. I'm installing them on my 98 c5 with it's stock cam (for now). I know my cam has a larger base circle, and that the valves are a little longer. What length pushrods would I need with my stock ls1 (98) cam? Later, I will probably put in the stock Z cam (02-04) and have to change pushrod length again. But, for now, what length?
Please do some home work and get a better aftermarket cam if you are going to do a cam swap.
Even with the ZO6 cam, you should change the valve springs.
BC
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Instructor
Joined: May 2010
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pushrod length
I'm sorry I thought I was clear. I wanted to know what pushrod length for use with my stock ls1 cam for now. The cam I go to later is not for sure. By the way, I am having the springs changed to be used for what ever cam I choose. Won't be over 575-580 lift. I just enjoy driving it not to race it.
Burning Brakes
Joined: Oct 2004
Posts: 985
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From: Florence SC
Do you know for sure they have the sodium filled valves? The set I bought were said to have them but the scales told a different story. Its not that big a deal in my case. Will you replace lifters and buckets while the heads are off? Might want to consider it. As for the correct push rods, the only way to know for sure what you need is to get a adjustable Push rod and do the math.
Last edited by bracketshark; Jul 5, 2013 at 06:23 PM.
Thread Starter
Instructor
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Thanks last c5. I'll try one and check the lash. That is, as soon as the heads are ready. Yes, I am changing the lifters also, plus valve job and maybe deck it. Everything on the heads is going to be fresh, except the valves. They stay.
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Instructor
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push rod length
By the way, while I'm purging you guys for info. When I put the heads and everything on and cleaning the intake, I plan to install a catch can. However, they seem to come anywhere from $19.95 to $495.00 with some minor changes in looks. They all seem to hook up the same way with one person claiming to put one on the pvc and one on the tb. Does the price of one make it better or is it just the size? Recommendations?
Melting Slicks
Joined: Jun 2012
Posts: 3,163
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From: Oceanside California
If you have not selected your final cam specs, deck milling amount, gasket thickness, etc. You should not be looking at push rods yet.
Edit: Just got what this was about. Never mind.
Edit: Just got what this was about. Never mind.
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Burning Brakes
Joined: May 2003
Posts: 1,058
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From: Roswell New Mexico
St. Jude Donor '07-'08
comp cams sells a pushrod length checker..you can get them from Texas Speed. Best way to check your pushrod length. Other then that, your just guess or you have to buy multiple single pushrods til you find the right one.
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Instructor
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push rod length
I have decided to do the smart thing and put this in the lap of the friend of mine who owns a very reputable machine shop in the San Antonio area. And low and behold, his friend, who he works with often does nothing but check heads for their flow #'s and does custom cam grinds for whatever your goals are. He also is well known in the San Antonio area. They both told me what C5 said on my original question. The stock pushrods will be fine unless I let them talk me into going the whole head and cam route. And yes, they are the light weight valves. Thanks for everybody's input.
Safety Car
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From: Vancouver Washington
Burning Brakes
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From: Florence SC
Team Owner
Joined: Mar 1999
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From: At the beach in little Rhody
I don't agree with stock length of 7.385" (they are not 7.400"). If you are having a "valve job" then the valves will sit deeper in the head. As a result, the valve stems will be higher relative to the rocker pivot point and this will change the geometry. If the valves aren't done yet, I would only have them lapped unless there are issues that require more work. With all the work being done, I would spend $20 on an adjustable pushrod and verify the correct length only after checking the rocker wipe pattern (geometry) in case the rocker stand requires adjustment.
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pushrod length
Well, they are perfect condition and they are light. They are for sale. I just need to find out what they are worth. My set up is not geared for every little bit of horsepower, just a nice strong dependable motor. If anybody is interested, I should know by next week, maybe sooner what they are worth.
Team Owner
Joined: Mar 1999
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From: At the beach in little Rhody
