Quick question. What is an up-pipe, and where in the turbo plumbing is it located?

 

The up pipe is the one before the turbo.
From the exahust manifold into the turbo.

 

Hmm...must be a boxer engine thing. I've been driving a turbo car for years. I've never heard of an uppipe since surfing this board.

 

Many of the turbo charged engines out there bolt the turbo right to the exhaust manifold. The boxer engine makes it tough to do that.

 

This doesn't seem STi related.

 

Does anyone know if the STi motor will fit in the 2.5RS. I mean the motor are the same size right. Correct if i'm wrong.If anyone knows please reply.

 

The physical dimension are prolly similair, but they likely don't have the same mounting points, making it tough to do the swap.

 

I think it comes from the fact that on boxer engine's the exhaust comes straight out the bottom of the head and shoots towards the ground. Then the Turbo is mounted level with the intake manifold which bolts to the top of the head. So Basically the manifold goes from the exhaust ports UP to the turbo.

Same Theory goes for the down pipe. Since the turbo is mounted high in the engine compartment the pipe coming out of the turbo must immediatly turn 90 degrees down so it can meet up with the rest of the exhaust.

Keith