What do the s4's and the s5's have with regards to turbos? Like brand/model/trim information? Perhaps some cfm specs?
Thanks
-Ross

 

Hitachi HT-18
it is a copy of a garrett design, i can't remember which one.

 

both series have the same turbo?

 

really... anyone have any more info on this? i'd like to know. good for comparison reasons.

BTW, i am pretty sure the stock a/r on the turboII turbos is a 1.00 hotside and a .55 (not sure) compressor.

 

All I know is the S5 has a way bigger wastegate. Other then I got no idea.

I am also curious as to any other differences.

 

They are the same turbos, but the s5 has a better hotside design with a dual wg hole design and better flow. It also mounts differently and the manifold is divided without the twinscroll. Are those .55 and 1.00 a/r ratios really right? That seems pretty large.

 

i know the hotside is rediculously large and its around 1.00

not sure about the .55 like i said for the compressor side, its probably something smaller like in the .40's or high .30's hell i dont know. all i know is the hotside is way big.

 

can you interchange a S5 wastegate on a S4 car?

 

you gotta exchange turbos i believe

 

you can exchange just the hotside of the s5 turbo and the s5 manifold. But the manifolds are different between series. The s5 one is better for flow.