datsunfish Posted July 16, 2008 Report Share Posted July 16, 2008 I have read repeatedly that the w58 and u67 have larger valves than the a87 and w53. They always looked the same to me so I decided to check them out. All I had on hand was a carb float measuring thing. Intake valves on my a87 were 41 mm and the exhaust were 34 mm measured at the widest spread on the valve face. Same as the w58. I took the a87 valve out and face to face it matched the w58. They appear to me to be the same and I am pretty sure the w53 has the same as the a87. Not trying to challenge any ones knowledge,just appears to me that I am right. Maybe the measurement is at the seat bore or something. Please enlighten me. thanks Quote Link to comment
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