Thanks bakat, I had previously given up on the calculator because I couldn't understand it but I gave it another go and think I've gotten it to work.

The calculator gives me a deck clearance of 3.75mm with RB30ET pistons and L24 rods.

have you tried playing with this? a must for L/Z enthusiasts

http://www.ozdat.com/ozdatonline/enginedesign/

at the moment im doing a L16 block, L18 cranks and pistons, L16/L24 rods. shaving a couple from piston crown to make it zero deck height.

I would like to put forged pistons and conrods into a z18et engine and I'm trying to come up with a good option from parts available off the shelf.

Currently I'm leaning towards using L24 forged conrods and RB30ET 0.50 (86.5mm) forged pistons.

Something I'm worried about is that from my calculations, (which may be wrong as I'm new to this), tell me I would end up with a deck height of -3.85mm.

I'd like to know if this could be a problem and if I am able to shave the block enough to correct it if it is a problem.

Also if anyone could tell me of a better combination they know of or if I'm eve on the right track that would be great.

Cheers