Guest Cronic Posted March 7, 2006 Share Posted March 7, 2006 Currently I have a 83 280zxt - but it appears I may have a slight crack in the block. How well do NA motors perform under boost? I would like to use the turbo head with an NA block, and my 57 trim t3/t4 (stage 5 stock 280zx housing). I'd like to make 350whp with the setup on 93 octane with a good tune. Just would like to know if it's doable. Thanks Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted March 7, 2006 Share Posted March 7, 2006 NA block will do fine, of course you have to use L28 block. Some NA blocks are even stronger than the turbo blocks. 75,76 N42 blocks are said to have a higher nickel content. Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 7, 2006 Share Posted March 7, 2006 I agree the NA block will do fine. I believe the F54 block (280zx block, both NA and turbo) were designed for better heat dispersion but the engineers didn't being into acount heat variance in the block. If you are just swapping everything over to the N42 block then it will work fine. If you want to run the n42 head and swap cams, it will raise compresion, so you would have to run bigger injectors. Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted March 8, 2006 Share Posted March 8, 2006 I agree the NA block will do fine. I believe the F54 block (280zx block' date=' both NA and turbo) were designed for better heat dispersion but the engineers didn't being into acount heat variance in the block. If you are just swapping everything over to the N42 block then it will work fine. If you want to run the n42 head and swap cams, it will raise compresion, so you would have to run bigger injectors.[/quote'] Wouldn't the NA pistons along with my turbo P90 head raise compression to around 8.x:1? I have 350cc injectors already, just not installed because the car has been down for so long. I was talking about using the entire shortblock, rods, pistons and crank from the NA, and using the turbo head. With my setup. Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 8, 2006 Share Posted March 8, 2006 Well I use a engine calculator that was posted on here a while ago. It said that compression would only be raised if you used the NA head, not knowing which block you had I use the N42 as an example. Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted March 8, 2006 Share Posted March 8, 2006 Really? I thought the pistons on the NA motors were flat topped and not dished like the turbo motors? Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted March 8, 2006 Share Posted March 8, 2006 Early NA L28 had dished pistons. Later NA L28 had flat tops Quote Link to comment Share on other sites More sharing options...
big-phil Posted March 8, 2006 Share Posted March 8, 2006 I have the n42 block I think I have the dished pistons 1978, check out my video.....15 pounds of boost N/A block and head, it feels good. And yes I have bigger injectors. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted March 9, 2006 Share Posted March 9, 2006 http://www.ozdat.com/ozdatonline/enginedesign/ Dave Quote Link to comment Share on other sites More sharing options...
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