can you use the s5 turbo manifold and hotside housing on an s4 turbo?

this is random i realize but theres an opportunity to get a ported s5 hotside etc and i wouldnt mind keeping my s4 compressor and rest of the stuff thats in good shape

 

no, the compressor side and center bearing housing is the same, but the hot side, manifold are different. I believe reted had a website fc pro that explains everything

 

As long as you match the manifold and hotside, it will work. The one problem combination is if you try using a double heat-shielded S4 turbo with the S5 hotside. The extra heat shield causes a gap between the turbine and housing and results in a loss in efficiency.The second heatshield can be removed, but requires disassembling the rotating assembly.

 

http://fc3spro.com/TECH/FAQ/ZVK/zvk.html
Bolt pattern is completely different

 

if you are saying the bolt pattern is different you clearly dont understand the question.


however i dont feel like taking apart the rotating assy so this idea may be dead as of now.

 

Oh sorry, I thought you were asking if a s5 turbine housing would fit a s4 manifold.
Now that I understand your question, of course you can! Tons of people do it, there are a lot threads on this. I highly recommend it especially if your Wastegate is not ported.

 

i actually read that link to fc3s pro. i had read it before but not that part specifically. so it looks like its do-able. im just not sure its worth it with the heat shield issue. if im going to need to disassemble it anyways, i might as well rebuild it. and if im going to go through all that mess i might as well just port what i have....as much as i want the s5 turbo response.

to be clear, hotside housing & manifold on S4 everything else. rotating assy and cold side housing.

 

it shouldn't be a problem, the efficiency issue would be marginally noticable. the lines might need to be tweaked a little to get them to fit though, since the S5 turbo/manifold uses completely different lines but the turbo positioning is nearly identical.

 

my s4 lines fit exactly the same, I guess the center bearing housing ends up in the same position in the engine bay.

I would only be worried about the s4 tiny Watergate flapper. if you search, a few dsm shops sell various flapper doors that could be fabricated on the s4 exhaust housing, bnr does it. I also had my buddy machine me a new sleeve so I don't get the Wastegate rattle. also better sealing. if you don't want to go through that trouble either get a s5 turbo, or have someone like bnr upgrade your s4 turbo. You don't want to blow an engine!

 

i think that is why he wants to use the S5 manifold and snail.