I know this has been answered before but i cant find the thread! What are the diffrences in these engines???

 

Sorry forgot to say 2004 uk specs

 

Normal wrx has an open deck block and cast pistons, uk STI has a semi closed deck block and forged pistons, bigger injectors, bigger intercooler, etc, lots of differences but what do you want to know specifically?

Tony

 

so does this mean the cams from a sti wont fit a wrx?? and also can you change the pistons over?

 

Do all STI's have forged pistons?
I was under the impression that had to be done later on.

Neel

 

New age STI engines have AVCS, the wrx's dont so its hard work doing anything like that, pistons should be a direct fit though

Tony

 

Not all, some new age ones have hypereuetic pistons which are cast though still very strong, rods on classics are very weak though compared to new age cars, and not all forged pistons are the same quality

Tony

 

is this the same on hawks too?

 

Hawkeye sti's have hypereuetic pistons, not as strong as the forged pistons due to their design, the jdm 2ltr cars of the same year have stronger pistons.

Tony