Should I run 7.350 Pushrods?
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From: USN, Haze Grey and Underway
Should I run 7.350 Pushrods? TR230 Cam
5.7L LS1 Heads milled .022 w/ 2.02/1.60 SS Valves..
Right now I'm running 7.4"... My valvetrain is really noisy.. (sewing machine) would the shorter rods quiet this down any?
5.7L LS1 Heads milled .022 w/ 2.02/1.60 SS Valves..
Right now I'm running 7.4"... My valvetrain is really noisy.. (sewing machine) would the shorter rods quiet this down any?
On The Tree
Joined: Jun 2003
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From: Hatboro PA
Any time you mill heads or have a block decked or a valve job done you need to recheck your push rod and rocker are geomitry. Just because your buddy or some one told you he is using this lengith push rod dose not me it will fit yours unless it is a combination that has been worked out by the same engine builder doing the same thing on your engine.This is the biggest reason for VALVE TRAIN FAILEUR.
mike
mike
Most Comp Cam grinds you buy (the 12 I have measured for the LS1 were all this way) from the vendors have a base circle 0.030" smaller than stock. You're heads are milled 0.022", that's only 0.008" difference, so 7.400" will work just fine.
This calculator will give you the pushrod length by a calculation based on your heads being milled and cam base circle, etc.
Here ya' go: http://home.insightbb.com/~l.proctor1/p-rod.xls
Enjoy!
This assumes stock spring installed height for an LS1. The stock pushrod size is base on an LS1 stock pushrod.
However, the only real way to tell is to check your preload, etc.
This calculator will give you the pushrod length by a calculation based on your heads being milled and cam base circle, etc.
Here ya' go: http://home.insightbb.com/~l.proctor1/p-rod.xls
Enjoy!
This assumes stock spring installed height for an LS1. The stock pushrod size is base on an LS1 stock pushrod.
However, the only real way to tell is to check your preload, etc.
Originally Posted by ROGERSPERF.
Any time you mill heads or have a block decked or a valve job done you need to recheck your push rod and rocker are geomitry. Just because your buddy or some one told you he is using this lengith push rod dose not me it will fit yours unless it is a combination that has been worked out by the same engine builder doing the same thing on your engine.This is the biggest reason for VALVE TRAIN FAILEUR.
mike
mike
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You should run the stock length pushrod. If your heads are milled more than .30 then you would use the shorter pushrods. Atleast that is what thunder told me when i bought that cam.
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From: USN, Haze Grey and Underway
Originally Posted by offaxis
You should run the stock length pushrod. If your heads are milled more than .30 then you would use the shorter pushrods. Atleast that is what thunder told me when i bought that cam.
Thanks.. I'll go with a set of the Hardened 7.4" Rod from Thunder...
Originally Posted by Z28Venom
Thanks.. I'll go with a set of the Hardened 7.4" Rod from Thunder...
