S30Turbo Posted January 23, 2012 Share Posted January 23, 2012 Can i put a p90a head into a 81 turbo block i seen that many members make their p90a into solid lifter style but im going for hydraulic because its quieter . Quote Link to comment Share on other sites More sharing options...
hughdogz Posted January 23, 2012 Share Posted January 23, 2012 Should be no problem. By the way, many P90A's came with solid lifters from the factory (sometimes all the way up to 83?) Quote Link to comment Share on other sites More sharing options...
S30Turbo Posted January 23, 2012 Author Share Posted January 23, 2012 Would it be worth it in your opinion I'm not planning to be reving like crazy I just want a daily driver with 250hp nothing too crazy and to be a lil more quieter than my current l28e with a hot cam. So everything is a direct bolt on right? Quote Link to comment Share on other sites More sharing options...
ctc Posted January 24, 2012 Share Posted January 24, 2012 (edited) Would it be worth it in your opinion I'm not planning to be reving like crazy I just want a daily driver with 250hp nothing too crazy and to be a lil more quieter than my current l28e with a hot cam. So everything is a direct bolt on right? Search! It has been asked and answered a million times now. Edited January 24, 2012 by ctc Quote Link to comment Share on other sites More sharing options...
S30Turbo Posted January 24, 2012 Author Share Posted January 24, 2012 I did search all I find is hyroulics to solid swap not vise versa but I been searching and now all I hear is that you lose power at 5500 rpm and parts are hard to find for p90a so I think I'm just going to with a regular p90 and live with it .. Quote Link to comment Share on other sites More sharing options...
Gollum Posted January 24, 2012 Share Posted January 24, 2012 Nope, this is all entirely impossible. Can't be done. The best thing to do is to just leave it stock... ... Okay, now for the real answer. All L heads will fit ALL L blocks (providing they're I4 head and block or I6 head and block). The setup might not be "ideal" but they all bolt up just fine. So yes, the P90A head will fit just fine and operate same as any other P90 head. The hydraulic lifters can definitely go beyond 5500rpm and should NOT be producing less power than the solid lifter heads. Problems arise when lifters go bad and start sucking power from your motor. Replacement lifters ARE difficult to find, but I've seen multiple motors with original hydraulic lifters running just fine to this day. Use whatever you can find or have. Fallow the path of least resistance. I know for me, lifter noise is the least of my concerns with my motor, but if I had super quiet exhaust and such maybe that'd be on the table for consideration. Quote Link to comment Share on other sites More sharing options...
NewZed Posted January 24, 2012 Share Posted January 24, 2012 (edited) Just a daily driver with an easy, low-revving 250 hp, but no ticking noises from the rocker cover. I would like that also, I'd even accept some ticking. Edit - isn't the P90A a factory stock head for the turbo engine? Not only a direct bolt-on, but a factory issued configuration. Edited January 24, 2012 by NewZed Quote Link to comment Share on other sites More sharing options...
Gollum Posted January 24, 2012 Share Posted January 24, 2012 Edit - isn't the P90A a factory stock head for the turbo engine? Not only a direct bolt-on, but a factory issued configuration. Yes, just not on an '81 block. In that year there were some other differences, mostly in the EFI setup. Quote Link to comment Share on other sites More sharing options...
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