333pg333

They still need a fair bit of fabbing to fit them Chris.

Paulyy

yeah they do, it's pretty much the same as a normal gt housing. everything is in the same position

Penguinracer

On a 2.6 I'd have thought a GTX3071R A/R .82 would be worth considering alongside the GTX3076R A/R .63?

Paulyy

All this info im about to type is all in my opinion and Based on what i've read here and alot of other sites.
IF i had the money and equipment i would go test all these turbos my self and give hard data but i dont so i cannot.

if im wrong anywhere let me know.

First off you need to know what you want out of your engine? how much boost you want to run? track car? street car? both? dyno queen?

gt3071r - .63 a/r - This turbo Should see 1Bar around the same time as a k26/8 and will spool extremely quick and will be perfect in a lower hp street car and mostlikley will suffer backpressure on higher boost levels.

gt3071r - .82 a/r - Will spool a few hundred rpm later then above, but you will be able to achieve more top end horsepower.

gtx3071r - .63 a/r - This turbo will be almost the same as the 1st one but will produce slightly more torque at higher rpm as it still be well in its efficiency range.

gtx3071r - .82 a/r - IMO would be the best all around performing turbo out of them all for mainly street driven and some track time. similar to the 2nd turbo in spool characteristics but again will hold top end alot stronger.

gt3076r - .63 a/r - Would be like the one above (gtx3071r - .82 a/r) but wouldn't handle as much boost though. we're talking about above 23 psi.. not that anyone here would do that on our cars unless heavily modded.

gt3076r - .82 a/r - Will spool ~300 rpm longer then the .63 but wil hold torque at higher rpm. more for a track car that is still street driven.

gtx3076r - .63 a/r - Would slightly a 5-10 ft lb torque increase through out the boost range from the gt series one, still would use this turbo for a street car that sees track time.

gtx3076r - .82 a/r - Would see the same increase 5-10 ft lb torque increase from the gt .82 version. more for a track car that can be used for street

Note when i say handle boost i mean it as you will get more back pressure the more boost you run, so when increasing boost the hp vs boost wont be as great.
Remember these turbo can handle over 30 psi, in theory though. with a smaller hot housing the boost limit drops where the backpressure increases.

TurboTommy

So, what's the turbine wheel size with the respective hot-housings?

Paulyy

They're all 60mm Dia Wheels. except the internal wastegate wheels are 56.5