SleeperZ Posted January 25, 2012 Share Posted January 25, 2012 I've searched, it seems like it should be a common question, but I couldn't find the answer. I know the rocker arms have different part numbers, but what is the difference? N/A arms are 1/3 the cost. Quote Link to comment Share on other sites More sharing options...
Gollum Posted January 25, 2012 Share Posted January 25, 2012 That's a very good question... I just bought a new digital caliper. I have a P90 and P79 sitting in my two Z cars. Maybe I should take off some valve covers and check it out for ya? Soonest I could get to it would be.... friday I think. Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 25, 2012 Share Posted January 25, 2012 interesting... wonder if it's MBA or some rockwell hardness difference due to the different contact rates between HYD/SOLID rockers? Then if it is different for an 81 and 82...I'm thinking MBA "Don't leave money on the table stick it to the Turbo Guys" kind of thing. I'd be interested to see what unfolds. Quote Link to comment Share on other sites More sharing options...
NewZed Posted January 25, 2012 Share Posted January 25, 2012 They're called out differently in the 1983 FSM, for one with oil pivot and one without. The drawing seems to show one with a lash pad, and no lash pad on the oil pivot setup. EM-5. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 25, 2012 Author Share Posted January 25, 2012 I have 11 turbo rockers in good shape and a set of non-turbo rockers as well. I can see no difference visually; same type of pivot, cam lobe surface, lash pad surface. Maybe there is a structural or mass difference.... Definitely not talking about hydraulic rockers, I've never seen one, so I don't know if there is a third or the "turbo" rocker is intended for the hydraulic P90A cams... Quote Link to comment Share on other sites More sharing options...
Nelsonian Posted January 25, 2012 Share Posted January 25, 2012 Curious to see answers to this as I am in need of new rockers for my new p90 head. Subscribed... Quote Link to comment Share on other sites More sharing options...
Gollum Posted January 26, 2012 Share Posted January 26, 2012 Well I'll have some pictures in a couple of days of caliper readings. If any feels it's important enough I'll even post them in the L motor dimensions thread. Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 26, 2012 Share Posted January 26, 2012 If it's 83 Turbo Specific then the pre hydraulics would be all the same, and the hydraulics would be different. My take on that new information. Quote Link to comment Share on other sites More sharing options...
Gollum Posted January 26, 2012 Share Posted January 26, 2012 (edited) If it's 83 Turbo Specific then the pre hydraulics would be all the same, and the hydraulics would be different. My take on that new information. But to be forcing everyone with a P90 to buy a more expensive rocker simply because of a minority needing an oil feed hole is ridiculous, especially when so many people convert over to solid lifters anyways. If I was that part supplier I'd be ashamed to be ripping people off like that, even if it's not a high value/volume part. Simply specify what people need and sell them the RIGHT part... Makes me wish I still had my hydraulic P90A sitting around. Edited January 26, 2012 by Gollum Quote Link to comment Share on other sites More sharing options...
Tony D Posted January 29, 2012 Share Posted January 29, 2012 I guess this is the outcry for the 'Occupy Nissan' crowd... Quote Link to comment Share on other sites More sharing options...
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