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FE Power Forums => FE Technical Forum => Topic started by: CDXXVII on April 05, 2012, 07:53:51 PM

Title: Cast iron valve guides or bronze liners
Post by: CDXXVII on April 05, 2012, 07:53:51 PM

My machinist (not an FE expert) prefers the cast iron guides. My iron 427 LR heads currently have thin wall bronze guide liners that are worn. I kind of like the idea of just replacing the liners without boring much from the original head.
Is there any risk in using the larger OD iron guide instead?

Title: Re: Cast iron valve guides or bronze liners
Post by: hotrodfeguy on April 05, 2012, 08:57:18 PM

I tend to look at guides like cams everyone has a preferance. I like the old iron myself , second the thin wall bronze and thermal expansion is less. as with a thick bronze guide it can swell up on turbo/supercharged applications. Unless you allow for an extra .001 or 2