what size pushrods??
Thread Starter
Melting Slicks
Joined: Oct 2003
Posts: 3,040
Likes: 47
From: El Dorado Hills CA
what size pushrods??
Good day everyone. I have a 98 coupe and will be installing a pair of 243 ls2 heads, ls6 cam, trunnion on stock rockers, and PAC 1218 beehive springs. I will also be installing a supercharger as well as a few other supporting mods.
Was thinking about picking up some chromoly pushrods but was curious if the 7.400 would work well of if I would need a different size?
Was thinking about picking up some chromoly pushrods but was curious if the 7.400 would work well of if I would need a different size?
Tech Contributor
Joined: Jan 2007
Posts: 19,518
Likes: 1,189
From: Dyer, IN
Good day everyone. I have a 98 coupe and will be installing a pair of 243 ls2 heads, ls6 cam, trunnion on stock rockers, and PAC 1218 beehive springs. I will also be installing a supercharger as well as a few other supporting mods.
Was thinking about picking up some chromoly pushrods but was curious if the 7.400 would work well of if I would need a different size?
Was thinking about picking up some chromoly pushrods but was curious if the 7.400 would work well of if I would need a different size?
Tech Contributor
Joined: Jan 2007
Posts: 19,518
Likes: 1,189
From: Dyer, IN
Tech Contributor
Joined: Sep 2005
Posts: 1,731
Likes: 82
From: New Market AL
Why go to the effort and expense of a cam swap only to put a stock LS6 cam in? Let that blower breath with some more valve duration & lift... Yes the LS6 cam will be an improvement over the LS1 cam, but why stop there?
Back to your original question. If you are spending $5,000+ on a blower and head/cam upgrade, don't you think it's worthwhile to buy an adjustable pushrod checker so you can verify what your particular combination of parts needs?
Back to your original question. If you are spending $5,000+ on a blower and head/cam upgrade, don't you think it's worthwhile to buy an adjustable pushrod checker so you can verify what your particular combination of parts needs?
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Does not matter!.
No matter how many engines Erik at HKE builds that are 100% the exact same he always measures the intake and exhaust to determin what length is needed. Math will only get you so far .. you need to measure to do it properly
Last edited by 99blancoss; May 2, 2012 at 10:28 AM.
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Thread Starter
Melting Slicks
Joined: Oct 2003
Posts: 3,040
Likes: 47
From: El Dorado Hills CA
I will talk to my installer and see if he can take the time to measure and I will just order the rods after the fact.
To answer chevy406's question...I am installing an ls6 cam because that was what Arun and myself came up with. We had discussed blower cams but since I live in the wonderful world of California SMOG control and will not be adding headers, he felt it would be pointless to go with anything more than an ls6 cam (and a waste of money).
Arun is well respected on the forum and I took his advice.
To answer chevy406's question...I am installing an ls6 cam because that was what Arun and myself came up with. We had discussed blower cams but since I live in the wonderful world of California SMOG control and will not be adding headers, he felt it would be pointless to go with anything more than an ls6 cam (and a waste of money).
Arun is well respected on the forum and I took his advice.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
What you could do is measure and then re-assemble with stock until the new ones arrive. However, new pushrods arrive very quickly and Manton is in CA as well and he does custom lengths. I would personally go with 11/32" Manton pushrods to stiffen things up especially since you are going FI. Hardened pushrods do not stiffen the valve train, you need a larger OD to do that.
Racer
Joined: Jul 2008
Posts: 293
Likes: 8
From: South Bend IN
You really need to take this approach. I told the person I got my cam from everything that I was doing, all the way down to the LS7 lifters, .040 head gasket, and even the millwork that had been done to the heads and was sent 7.425 rods. When I measured I needed 7.350 rods. Had I just thrown in the rods that came with the kit I would have bent things for sure. Measure.
