Hi just wondering if anyone can help, ive got the early 205 RS500 block with the small core plugs, is there any difference between these and a normal 205 block if so what ? The block is machined for cooper rings but is about ready for a rebore and new pistons. Ive been running 350bhp but would now like to take it up to bout 400 is it worth carrying on with this block or should i start a fresh with a 200 block. Any advice would be much appreciated, Thanks.

 

its a lot better than the std 205 2wd block, it will happily take 500+

 

It also depends on whether or not it has been rebored before...I would not want to run big power on anything over +0.25...that's just me...