Bigger valves in 915 BB heads

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Re: Bigger valves in 915 BB heads [Re: JohnRR] #1402373 03/14/13 12:24 PM 03/14/13 12:24 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: The head should have the same amount of material in that area as a head with a 1.74 valve and other than the open chamber it's the same as a 906 . I have a set of 906's with 1.81's , but I don't remember if I put seats in or not ? Call Dwayne Porter , he can tell you definitively , but the wild card is CORE SHIFT. Does the shop have a sonic tester they could check the area ? I agree as I would call Dwayne Porter and ask him. I also put 1.81 valves in my old 906 heads but I made the seats in the head and did not install hardened seats. Ron

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