I'm in the middle of going turbo with my 99 2.5 rs and it is going well so far. I have made plans to go ahead with my next project for my car and hope to get some good advice. While I'm driving my recently boosted 2.5 rs, I would like to buy a short block to build up. 2.2 or 2.5, closed deck or open deck, 2.2 bottom end with 99 2.5 head or any other combo that I can put my 2.5 rs head on? Which is the best setup? I plan on building a 2.2 or 2.5 turbo so if I blow my current setup I can replace it with a monster. Any suggestions with what the best year block, ltr size and internals for my 99 2.5rs? Once again, thanks for the advice.

gm:banana:

 

The simple solution is an STi shortblock. They are $1575 shipped including gaskets, are capable of withstanding lots of hp, and work with SOHC EJ25 heads. I haven't seen what the exact compression ratios is, but it should fall somewhere between that of the STi and the RS (8.5-1 to 9.5-1).

 

Who sells these shortblocks for that price? So, everything else from my engine should work on the shortblock right? I suspect I will need new engine management?

gm

 

www.subaruwrxparts.com

Contact their parts department and ask for Brian. I belive they are sold out at the moment, but are getting more in. The price is $1575 shipped, including gaskets.

Whatever engine management you had planned will still work with the new block, it's just a lot tougher than the original.

 

Thanks!

gm