Turbo280Z Posted January 12, 2006 Share Posted January 12, 2006 ok whats the easiest way to find out what the CR is? im running a n42 block and n47 head with turbo dished pistons. does anyone know what about it would be? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 12, 2006 Share Posted January 12, 2006 Search. BTW, N42s all came with dished pistons. F54s came with "turbo" dished pistons. Quote Link to comment Share on other sites More sharing options...
FEnatic Posted January 12, 2006 Share Posted January 12, 2006 try this website, very informative... http://www.geocities.com/zgarage2001/z.html Quote Link to comment Share on other sites More sharing options...
katman Posted January 12, 2006 Share Posted January 12, 2006 If the head has ever been milled, or the block decked, or an aftermarket gasket used, the only way to figure it within +/- half a point is to cc the head, gasket, dish, and measure bore and deck height and do the math. There is no easy way if you want an accurate answer. Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted January 12, 2006 Share Posted January 12, 2006 the easy answer is... if it's stock 8.29:1 CR Your welcome. Quote Link to comment Share on other sites More sharing options...
Turbo280Z Posted January 13, 2006 Author Share Posted January 13, 2006 the block and head are stock and stock head gasket. we only changed the rods and pistons to the turbo pistons and rods. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted January 13, 2006 Share Posted January 13, 2006 http://www.ozdat.com/ozdatonline/enginedesign/ Little engine calculator I wrote a while back. If anyone has specs that aren't in there, like head CCs, please PM me and I'll add them for everyone. Dave Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted January 13, 2006 Share Posted January 13, 2006 8.257:1 according to me Dave Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted January 13, 2006 Share Posted January 13, 2006 turbo con rods are the same length as N/A rods (they are probably the same exact rods) the turbo pistons have the same CC's (10.9) as regular L28 stock N/A pistons. long story short ... it's the same CR as before 8.29:1 (or there abouts) Quote Link to comment Share on other sites More sharing options...
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