mfg Posted February 5, 2022 Report Share Posted February 5, 2022 The intake and exhaust valves in a Studebaker Avanti R3 cylinder head have .....?.... more space between their (valve) center lines than in an Avanti R2 cylinder head. 1) 1/8"....2) 3/16".....3) 1/4"....or....4) 5/16" Link to comment Share on other sites More sharing options...
mfg Posted February 6, 2022 Author Report Share Posted February 6, 2022 Thoughts here? Link to comment Share on other sites More sharing options...
Dwight FitzSimons Posted February 6, 2022 Report Share Posted February 6, 2022 I will guess 4) 5/16". Looking at an R3 head with the rockers installed the offset is obvious and appears to be considerable. --Dwight. Link to comment Share on other sites More sharing options...
brad Posted February 7, 2022 Report Share Posted February 7, 2022 1/4" sticks in my mind. Link to comment Share on other sites More sharing options...
silverstude Posted February 7, 2022 Report Share Posted February 7, 2022 me too thinks a 1/4" because that's how much relieving of the cylinder walls is required (.125 per side) Link to comment Share on other sites More sharing options...
pantera928 Posted February 7, 2022 Report Share Posted February 7, 2022 I am thinking 1/4" too Link to comment Share on other sites More sharing options...
mfg Posted February 7, 2022 Author Report Share Posted February 7, 2022 On 2/6/2022 at 4:20 PM, Dwight FitzSimons said: I will guess 4) 5/16". Looking at an R3 head with the rockers installed the offset is obvious and appears to be considerable. --Dwight. Close!...but not 5/16" Link to comment Share on other sites More sharing options...
mfg Posted February 7, 2022 Author Report Share Posted February 7, 2022 19 hours ago, brad said: 1/4" sticks in my mind. 4 hours ago, silverstude said: me too thinks a 1/4" because that's how much relieving of the cylinder walls is required (.125 per side) 2 hours ago, pantera928 said: I am thinking 1/4" too You guys sure know your fractions!!....1/4" it is! Link to comment Share on other sites More sharing options...
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