TheNeedForZ Posted October 21, 2007 Share Posted October 21, 2007 The distance from the center of the intake valve to the center of exhaust valve on L series cylinder heads...did it change throughout the years or did it stay the same? I know the earlier heads have smaller valves, but is the valve center distance shorter compared to that on later heads with larger valves? Quote Link to comment Share on other sites More sharing options...
olie05 Posted October 22, 2007 Share Posted October 22, 2007 I'm no specialist on the subject, but since the cams interchange, and the cam spacing is the same, I would have to guess that the valve spacing is the same. Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted October 22, 2007 Author Share Posted October 22, 2007 I compared the cam lobe width to the rocker pad width on my P90 head which is the only L series head I have. The cam lobe is wider than the rocker pad. That means even IF the valve location is different between the heads, you can still swap cams given the safety margin built within the wider cam lobes. So cam interchange capability doesn't 100% prove it for me....althought you could be right. Any taker on this? Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted October 24, 2007 Author Share Posted October 24, 2007 =( Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted October 30, 2007 Administrators Share Posted October 30, 2007 Using my 12†Mitutoyo calipers, did a quick outside to outside of guide measurement on a P-90, P-79, Z/N-47 and a N-42. All measured the exact same valve spacing. Keep in mind those are all L-28 heads and share the same diameter valve heads. I think I have an old E-31, an E-88 and access to an MN-47. Give me a few days on those… Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.