Has anyone used N/A housings in a t2 motor? Do the diffusers in the exhaust port affect turbo spool?

 

yes, it works
we just cut them out

picture of stuff cut out, no porting yet....

 

How in the world do you cut that hard metal?

 

SGS porting bits

 

Me too.

****, my FD is running around with s5 NA rotorhousings.

Cut that diffuser out of there with a torch, takes 3 minutes per side.

 

What is the diffuser for? does it resrtict exhaust flow and would it be a bad idea to cut them out on a NA?

 

it is to lower noise. it does restrict flow slightly. cutting them out will prpoduce a bit more flow but a bit more noise.

 

ok... so what was the solution to the missing coolant passage? Just curious, I shouldn't ever need that passage:-P

 

Not to hijack, but what are your opinions on removing the sleeve all together? The last thread I read about this topic was full of approvals.

 

i don`t like idea of whole removed sleeve, its kinda protection to rest of housing which is alu...imho

 

Grinding stone....Takes a little time, but works well. Just don't waste the expensive, good stones. Use cheap hardware store stones.

 

SGS bit is not cheap, but it does work good and will not be wasted in this

 

I was just curious. I'm building a PP at the moment and I've already removed the sleeves.
Aluminum alloys are cast in the 1150°F to 1300°F range, so your probably right, but I hope your not.

 

Don't run the coolant thru the intake manifold, no big deal.

 

FOr a stock t2 application, use the NA housing in the front position....the rear is the only one necessary to feed the stock turbo.

IF you need to use 2 NA housings, well just pull water supply from elsewhere, like the BAC hoses.