Hi hoping someone on here might be able to help,

I have two subarus STI (red top engine) one is 1999 which is heavily damaged and one is 1997 with a blown bottom end.
I am hoping to put the engine from the 1999 into the 1997 however I see that some of the wiring is different.

Do I swap all the wiring from the 1999 to the 1997 which looks to be quite a task (dash out ect) or do I swap over all the manifolds and cylinder heads to the good block which is also a bit of a task. Or is there a simpler sollution.

Any info would be greatly appreciated.

John

 

I would do it the second way of your choices swap all standard bits onto good block keeping the wiring loom the same a lot easier and quicker , do you need to swop the heads or is it just the inlet manifold ?

Mark

Mark

 

Thanks mark,

Im not sure if the heads are the same not taken any parts off yet and offered the manifolds up to see if they fit


John

 

The compression height of the pistons and combustion chamber volumes of the MY'99 are different to the MY'97 so you can run into Compression ratio problems fitting early heads onto a Phase 2 block.

Mick

 

won't the 99 sti be a different map also?

 

Are the inlet and exhaust manifolds the same fitting or are they different too?

Are there other wiring issues that I may need to address on the block

Thanks for the replies guys

 

Staggered bolt pattern on the MY99 Inlet manifold ~ inline bolt pattern on the MY97.
Headers will swap over ok