Compressor housing quandary
#1
Elite Member
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (7)
Join Date: Apr 2006
Location: VaBch, VA
Posts: 6,456
Total Cats: 325
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Well, my SR20det compressor housing adapters haven't showed up yet... almost ready to file a Paypal claim, but it got me thinking...
My old 2G DSM compressor housing is .48ar and the new one is .80, ie. imcompatible. Why not just port the old one to go over the new compressor wheel??? That would be awesome as I wouldn't have to modify any of my existing piping. Obviously the tolerances are fairly tight and I wouldn't want to tackle this with my Dremel. I know turbo shops do a lot of machining but couldn't find anybody who advertises this exact service.
Anybody know of a shop who will take my .48ar compressor housing and port it out to .80ar?
My old 2G DSM compressor housing is .48ar and the new one is .80, ie. imcompatible. Why not just port the old one to go over the new compressor wheel??? That would be awesome as I wouldn't have to modify any of my existing piping. Obviously the tolerances are fairly tight and I wouldn't want to tackle this with my Dremel. I know turbo shops do a lot of machining but couldn't find anybody who advertises this exact service.
Anybody know of a shop who will take my .48ar compressor housing and port it out to .80ar?
#2
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Unless I'm mistaken the A/R is not the size of the wheel, it is the ratio of Area/Radius which is the cross-sectional size of the compressor housing inlet divided by the distance from the center of that area to the center of the turbine. The wheel size does affect this but the size of the volute in the housing is also important.
So they would be porting it to the size of the wheel and not just the A/R. Kind of like when people upgrade T25s to a T28 compressor side I suppose.
I don't know anyone that does that machining though.
I'll sell you my compressor outlet if you want, it's the one from ATP, comes with seals, bolts, and vac fitting.
So they would be porting it to the size of the wheel and not just the A/R. Kind of like when people upgrade T25s to a T28 compressor side I suppose.
I don't know anyone that does that machining though.
I'll sell you my compressor outlet if you want, it's the one from ATP, comes with seals, bolts, and vac fitting.
#7
Elite Member
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (7)
Join Date: Apr 2006
Location: VaBch, VA
Posts: 6,456
Total Cats: 325
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
So, what to do?
I know somebody out there in the turbo world has a CNC machine with the correct program already to go for what I want... or something like that. I'm gonna call a couple of the custom places on the internet and see what they recommend.
I know somebody out there in the turbo world has a CNC machine with the correct program already to go for what I want... or something like that. I'm gonna call a couple of the custom places on the internet and see what they recommend.
#9
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
You also have the option of having a cast aluminum elbow welded onto the outlet. WOT can get them through ATP. That way you don't have to have the housing machined at all and you maintain all stock components for that turbo. I was going to go that route, but decided the machine work to be far easier.
#11
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
You can contact Guillaume at Blaastperformance too. He'll answer your email and tell you all your options. He might have a housing you're looking for which would be cheaper than the machining probably. If he can do the work, I've got a $50 credit with him which I'd sell for half price too. That offer goes to anyone looking to get something from him. I don'tneed any turbo stuff in the near future.
Frank
Frank
Thread
Thread Starter
Forum
Replies
Last Post
EricJ
Suspension, Brakes, Drivetrain
7
09-11-2021 11:10 PM
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM