datsunlover Posted November 13, 2004 Share Posted November 13, 2004 Ok, this is a stupid question maybe.. but I'm gona ask anyway... Some history first.. My ORIGINAL plan, before I decided to go V8, and that fell apart all around me, was to 'freshen' the head on my 280z (N42) and drop it on an 81 ZX block (that suposedly has flat top pistons.. I'm not sure now, as I've heard conflicting statements) BUT: I got rid of that ZX I was gona use to do this, cause I 'thought' I was going V8. Things happen. Life sucks. I got my helmet though... So I've been looking into just rebuilding my 280's motor, buying a 5 speed, ect.. and it's adding up... Looks like it'll be somewhere around $2000 when all is said and done. Anyway, here's where I am now; I might have a line on a running/driving '79 280zx (for a lot less than it would cost to rebuild my 280's motor and get a 5 speed, ect ) My question is; will my plan still work? IE; will this 79 have the flat top pistons in it? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 13, 2004 Share Posted November 13, 2004 Check the head. If it is a P79 it will have flat tops. If it is an N47 then it won't. Quote Link to comment Share on other sites More sharing options...
datsunlover Posted November 13, 2004 Author Share Posted November 13, 2004 Ahh.. Alrighy then. Thanks. Quote Link to comment Share on other sites More sharing options...
datsunlover Posted November 15, 2004 Author Share Posted November 15, 2004 Just wondering.. are all the 79/83 FI intakes the same? IE; are the bolt holes that hold to the block in the same place? (I know there are several head designes) What I'm thinking is using my 75' head (stock N42, just freshen'd up, polished cam, ect) on the ZX block...assuming the zx has the flat tops.. Then I could in theory bolt on the zx EFI. My 75 WAS FI, but it.. um, died. I've got good round top SU's on it now, but I drove the car today.. and it didn't want to idle/warm up/ drive withough farting and poping. I thought.. "wow.. fi would be nice right now.. turn key, warm up for a min or two.. and drive away!" Actually, I still have the FI intake and fuel pump from my 75.. and I KNOW that bolts up.. I'd have to change over all the electrics from the zx though.. Now... assuming it would all bolt together (which I think it would..) will the zx EFI be able to handle the N42 head and the jump in C/R? Or will it become.. confused? Quote Link to comment Share on other sites More sharing options...
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