346 with ls6 cam and 317's pushrod?
#1
346 with ls6 cam and 317's pushrod?
building an iron 346 with ls6 cam and 317's. im also running the ls9 gasket. the ls6 cam has a smaller base circle so i know ill need the 7.425 lenghth. im wondering if i need to go a little longer since im running a thicker gasket? Anybody running a similiar setup please chime in. Thanks!
Last edited by hsiriyob; 04-26-2012 at 04:47 PM. Reason: spelling
#5
You need to assemble the engine minus the pushrods. Install a pushrod meausuring tool in place of a pushrod. Make sure you are measuring a cylinder that is at tdc and has both valves closed by the way. Tighten the rockers down to 22 foot pounds extend the push rod measuring tool until you have zero lash. Remove the pushrod measuring tool and measure it. Take that number and add it to the preload you want to run and you have the length of pushrod that you need to buy. Example:
You measure the pushrod measuring tool and it measures 7.34"
You want to run .060" of preload
7.340" + .060" = 7.400"
You would want to buy 7.4" pushrods.
You measure the pushrod measuring tool and it measures 7.34"
You want to run .060" of preload
7.340" + .060" = 7.400"
You would want to buy 7.4" pushrods.
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