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OldmanAdam

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woody 79mm is (120 thou over)

its all in the crank lags, but instead of the mazduh bp 1.6 pistons, why not go the e15 pulsar turbo pistons, cause we can all see what will happen after efi.... turbo

thats ok 1200gxman more backup is good

Oops, it seems we have more A series experts than I thought.

hi lagwagon
the deck hight on a15 & a14 are the same u fit the a15 crank with a14 rods & a15 acl pistons 1mm oversize =1530 cc this will work ok with a high comp head about 29cc = about 9 to 1 comp . low comp a14 head is h72 or h75 but you can mill up to about 2 mm of to get comp up
ps a14 & a15 rods are the same . a15 pistons are 2.5mm lower but look out for crank clerance to block & oil pump
i am 97.8% on this but not 100%
hope this helps

edit get a cam to go with throttle bodies but if you mill the head look out for valve hitting pistons . (get a street cam )
or you will need more comp

i hope my spelling is ok

Lagwagon, the difference between the
A14 & A15 is the crank,the A15 has a 5 mm longer stroke. The con rods are the same, so the difference in height is in the gudgeon pin position in the piston. Using the A15 crank with A14 rods & 76 mm(stock bore) A15 pistons will give you a capacity of 1488 cc's, identical to the A15. You can then get 76.5 mm pistons or 77 mm pistons as a stock replacement to allow you to clean up the bore. Being such a small overbore you shouldn't have too much troubles with the compression.78 or 79 mm pistons are available,usually they are for a Mazda engine, & i think you have to bore out the gudgeon pin holes to suit the Nissan Gudgeon. My suggestion would be to get some 76.5 mm pistons from a Nissan dealer & get the block bored to suit. You then have 2 more overbore sizes left in the block, so you dont have to throw it away when it wears out.