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Author Topic:   votec head question/ when to polish the crank
hughes
Member
posted March 04, 2002 01:40 PM
To eliminate coil bind on the vortec heads, I was told all I needed to do with a hyd cam .500 - .520 lift was run a longer valve +.100. I was also told to cut the valve guides by others. I am stumped on that one.

When do you decide to polish the crank. And what does it accomplish besides making the crank shine. I dunno

sdhnc29
Member
posted March 04, 2002 09:36 PM
hughes ,

Normally we will use a .100" long valve with Vasco (sold by Crower) stock diameter spring's . This is a killer spring , and will handle up to about .625" lift . Crower sells a spring though , that will work with stock length valves @ your lift , without a coil bind problem . Yes , you must cut the valve guides down , about .200" should be plenty .

You should polish your crank if your engine has seen any dirt or foreign particles in the bearings , or if it has been mis-handled in any way (nicked etc.). I'd also suggest getting your crank magged if you have any time on it at all . Magnifluxing is often overlooked when freshening an engine . It's better to spend a few dollars on preventative maintenance , than to run over your crank during a race .

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


hughes
Member
posted March 06, 2002 07:06 AM
thanks Steve


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