INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

What Length Rods?

Old Jan 11, 2015 | 05:23 PM
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Default What Length Rods?

What length pushrods would I need with a 212/218 TSP Cam with .522/.529 on a 112LSA?

Going to be using the blue ls6 springs with stock heads.

Thanks
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Old Jan 11, 2015 | 05:28 PM
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7.4" unless tsp says it's on a smaller base circle
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Old Jan 11, 2015 | 05:28 PM
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Get a pushrod length checker tool. That way you can set the preload to what you want, and make sure everything is 100% correct.
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Old Jan 11, 2015 | 06:44 PM
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Thanks, Dirt Track.

Beeble,

I had checked out those length checker tools, but I was hoping to only have the truck apart for a day. But if it's the right way to do it then I may have to deal with having the truck down for a week.

Is there a certain preload amount that is considered optimal?
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Old Jan 11, 2015 | 07:07 PM
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If you can swing it buy a few sets at different lengths and just return what you don't use.

I'm running at .075" preload w/LS7 lifters, I think the recommended range is something like .050"-.080"? More preload tends to be on the quieter side (no sewing machine) from what I've read (mine is pretty quiet too).
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