akhelihoon907 Posted May 21, 2010 Share Posted May 21, 2010 hey so i bought a 260z with a 280zx motor in it. the motor was converted to carb and has the stock smog exhaust from the 260z on it. im dont know where to look for the block casting but the head is a p90 for sure. my questions are was this motor a turbo motor at one point? did they make a n/a motor with a p90 head? how can i tell if it was a turbo motor? Quote Link to comment Share on other sites More sharing options...
woldson Posted May 21, 2010 Share Posted May 21, 2010 Pull a plug and look for dished pistons. Quote Link to comment Share on other sites More sharing options...
akhelihoon907 Posted May 23, 2010 Author Share Posted May 23, 2010 where do i look for the block casting? Quote Link to comment Share on other sites More sharing options...
blue72 Posted May 23, 2010 Share Posted May 23, 2010 Block casting numbers are on the driver's side of the block, usually somewhat hidden under the exhaust manifold and just behind the engine mount. The P90 only came on turbo motors. If it is a turbo motor the block would be an F54 and it would have dished pistons like woldson said. Quote Link to comment Share on other sites More sharing options...
akhelihoon907 Posted May 25, 2010 Author Share Posted May 25, 2010 So would a stock N/A motor fron 1982 have a p79 head? What did they use for a N/A block? What numbers? I just bought a 83 turbo motor with a p90a head not knowing i might have turbo motor minus the turbo, but why would someone use a p90 on a N/A motor? If I already have a turbo motor in my car all I would need to do is throw on efi stuff, turbo and the wireing harness and in good right? Quote Link to comment Share on other sites More sharing options...
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