2.5 Block

[wrx kenny]

is there any difference between the uk supplied and the us supplied 2.5 sti block , even with delivery its still about £ 700 cheaper from the us . next question, the block is a 2002 -2006 why are these blocks so damagable is it through to much powewr going through them or very hard driving or are the internals just garbage

thanks for any answers

kenny

[trackhound]

is there any difference between the uk supplied and the us supplied 2.5 sti block , even with delivery its still about £ 700 cheaper from the us . next question, the block is a 2002 -2006 why are these blocks so damagable is it through to much powewr going through them or very hard driving or are the internals just garbage

thanks for any answers

kenny

Hi Kenny - both have the notoriously fragile EJ257 OEM pistons. Rods seem to be ok to 450 and casing up to the 450 - 500 mark. After that the risk of liners cracking/moving increases without the block being strengthened with inserts around the liners. I'd suggest a 257 short motor with forged pistons for your application for peace of mind. Suggest speaking with Steve at SW Motorport who usually has a set of 257 casing and rods/crank etc kicking about looking for a good home. I'd also suggest getting the chambers in your 2L heads modified to suit the larger 99.5mm bore (generally allows you to run more timing). Steve can do this too and does a first class job.

Cheers

Alistair

[wrx kenny]

thanks alistair , once again

kenny