Okay Guy`s :

I gave my old Vx motor to my buddy , He has a DX . We swaped out the head and I noticed. The D15Z1 Pistons are dished (meaning the top of the pistons take a deep slope down ) but the Dx pistons are mostly flat top with 4 valve reliefs <--cant spell.
I was wondering since we put the Vtec-E head on thge DX block. If it would change the Comprsion Ratio ? If it does any one know to what specs ??

and Is an EX 5spd Tranny Code an S20 ?

thanks in advance

eddie :naughty: