Single Turbo sizing questions

[03evoIII]

Thinking of starting to gather some parts my winter turbo build. I am leaning towards a single turbo setup to keep costs down and for the sake of simplicity. I'm also on the fence about doing a front mount kit or rear turbo setup. I think the rear turbo setup would be pretty easy to do and I'd be back on the road much faster. My only issue is if I have the room to run the single turbo in the rear.

The size of turbo I was considering is a midsize T4 1.15-1.30 exhaust housing, 78-82mm (inducer wheel) turbo. Somewhere in the 900hp range for turbo capability and 700-750whp target for my car. Full fuel system running on e85 and SCT Tuner (I'll be tuning myself). I'll be running 10psi max most likely, probably just off the WG spring. Oh I was thinking of running one of those oil-less COMP turbos as well so I don't have to mess with the oiling feed/return, etc.

Does that turbo size sound adequate?

Thanks for any advice!!!

[ZZ SRT]

Thinking of starting to gather some parts my winter turbo build. I am leaning towards a single turbo setup to keep costs down and for the sake of simplicity. I'm also on the fence about doing a front mount kit or rear turbo setup. I think the rear turbo setup would be pretty easy to do and I'd be back on the road much faster. My only issue is if I have the room to run the single turbo in the rear.

The size of turbo I was considering is a midsize T4 1.15-1.30 exhaust housing, 78-82mm (inducer wheel) turbo. Somewhere in the 900hp range for turbo capability and 700-750whp target for my car. Full fuel system running on e85 and SCT Tuner (I'll be tuning myself). I'll be running 10psi max most likely, probably just off the WG spring. Oh I was thinking of running one of those oil-less COMP turbos as well so I don't have to mess with the oiling feed/return, etc.

Does that turbo size sound adequate?

Thanks for any advice!!!

I'll be the first to tell you having just finished my single turbo setup, that a single is not the simple way.

With all the room in the footwells, it's like these cars were designed with a TT setup in mind. The ONLY downside is the scavenge pumps and lack of gravity draining which obviously would be solved if you use the COMP oil-less turbos.

As far as budget, I dont really see the build costing much different than a single either in the grand scheme of things.

[03evoIII]

^^^ Thanks ZZ SRT for getting back. That was my main concern/issue..was messing with all the oil return stuff for anything as low as the oil pan. Twins, even in the foot wells seem like double the work for everything. I do think that doing a single turbo in the rear would be the easiest....and I agree a single turbo up front seems like a great deal of work. I'm leaning more towards the rear turbo kit I think.

[ZZ SRT]

^^^ Thanks ZZ SRT for getting back. That was my main concern/issue..was messing with all the oil return stuff for anything as low as the oil pan. Twins, even in the foot wells seem like double the work for everything. I do think that doing a single turbo in the rear would be the easiest....and I agree a single turbo up front seems like a great deal of work. I'm leaning more towards the rear turbo kit I think.

I guess I am confused when you say rear? Are you saying rear as in a single turbo in one of the two footwells? If so, yeah, I suppose that wouldn't be too bad if you can actually make it fit! If you are saying a rear mount as in near the rear diff, then once again, IMO a basic TT setup, where you have barely any hotside piping because of where the stock manifolds dump, would be much easier.

[99RT10]

Comp oil-less turbos are the way to go. They are water cooled.

[03evoIII]

Are you running them 99RT10?

[03evoIII]

Sorry to confuse...I mean rear as in behind the rear tire somewhere.

[PaulP]

I have new comp oilless ball bearing turbos 67's tial vbanded on the shelf if you need,
might just seem like double the work but it will be a lot easier and faster time frame if you went with the twin turbos in the foot wells

[Junkie]

The Comp Turbo's I owned years ago were junk, hopefully something has changed.

On such a big motor I would think go at least 88/91.