can a ld28 crank go into a l28--for no fuss?

[datfreak]

ive got a n42 L6 and I was playing around with the "L series engine builder software", trying to up the compression in my otherwise standard motor.

It says that flattop pistons will give 9.82:1..which is good BUT the z car garage web site says flattops would give 10.4:1..

which one is right??

Then I tried putting a ld28 crank into my standard n42 motor and L series engine builder said id get 10.4:1 !!! perfect...BUT it says that my deck height is ok..wouldnt the pistons be sticking above the block with a stroker crank with no different rods/pistons?

Any ideas? Whos right?

[datfreak]

oh... deck is how much the piston goes above the block...

I thought that it meant it went above when the number was negative..Is 2.030 mm too much deck,,ie will it hit the head?

[z-ya]

You can't just put the LD28 crank in without changing rods and pistons. The pin height of the L28 pistons is too low, yeilding too tall a deck height. You need to use L24 rods, and KA24 pistons (240SX). And then you need to mill the top of the KA24 pistons to give an acceptable deck height . Press the L31 button and you will see what I mean. The deck height should be close to zero. A stock L28 has a deck height of + 0.03mm. If you keep the deck height close to stock, you won't have interference problems.

Pete