So I've been thinking about doing the 10.5 hotside mod, but for the trouble it takes to get the new housing installed, I could probably just buy the whole darn '05 turbo.

I guess my question is... do the '05 hotsides work with the '03 compressors? I've been thinking of switching to a 10.5, but since the '05's have the new flappers it might be worth a look over the older 10.5's. If not, then I guess I might just look into buying a used '05 turbo?

 

I think the actual performance between the old and new 10.5 hot side won't vary much, the revised wastegate flapper is designed to reduce turbulence into the O2 housing, also "Supposedly" to increase flow slightly to reduce boost creep.

and YES, since the CHRA (turbo center section or cartridge) is the same as the earlier turbo, it will swap onto an early turbo.

 

Interesting... I still wish there was some concrete graphs to see what kind of output differences we'd be seeing.

I was planning on doing a 02 housing simultaneously while it's all out too. In your opinion, do you think any of the aftermarket units would see would have any long term reliability problems, as they are not cast?

And lastly.. what do you think the installation cost might be on a new hotside? If it's bad, maybe I'll just pick up the hybrid TME turbo they have on FP...

 

Keep in mind the temperatures seen post turbine are MUCH lower than that in the exhaust manifold. The O2 housing has very little weight to support and it has a much larger surface area to distribute that load versus the manifold you so commonly hear of. You would have no problems running a "tubular" type O2 housing.

Not everyone is as equally inclined to work on their own vehicles, but I believe anyone with a service manual and a complete set of tools, would be able to tackle the job. If you just flat out don't wish to do it, or whatever the case. You could figure 4-5 hours labor for the job, just guessing...