zs 260
 

standard piston will take 15psi as long as you get the fuel right with out problems as long as its the 220/420 engine the 620/820 used dif pistons and are only go for 12psi max my old 220 gsi ran 14psi and never let me down

But for the sake of £500 is it worth taking the risk? Seen as it's all apart anyway.

agreed, if it's in bits it's daft not to

some sort of fall out with the partners from what I've read. No doubt it'll be back :hmmm: