Turbo specs

[Clarkie]

I'm trying to find the turbo specs for the turbo used on the ATX kit?
Have a few guys looking to do turbo kits,they want them to pull low down(1200-1400rpm on boost)in the rev range which from what I'v heard on here the ATX turbo does.If I can get the specs for that then we cant track some down the same.

Also anyone know what the spec are for std GQ turbo?

Thanks Shane

[sootygu]

AXT does not boost up that low.

I had one on a 100 series and full boost was around 2000 rpm, ended up changing the exhaust housing to a .48 AR. This was far better.

[Clarkie]

Can anyone recommend what specs(A/R trim)would work well down low?we'r not looking for huge power,more a strong torque band down low.
Thats why we wanted std turbo specs.

Shane

[xenith]

i would and do use a rb25 off a skyline high flowed and steel wheeled by precsition turbos 02 97565757 in sidney they are the best FULLSTOP and it spooles up lower than that and it rocks.Will hold 20 psi to 5000 rpm

[DR Frankenstine]

I had a turbo off a 4.2 gu on my 4.2 gq and it was set at 12lb boost. At 1400rpm it was pushing 6lb boost and full boost by 1800 rpm. The biggest mistake diesel owners make is fitting to big a turbo, the little gq turbo will push 20lb to redline anyway. A garrett 28 is plenty big enough for a 4.2 diesel if your talking petrol then thats a lot different.

[PGS 4WD]

Its a bit of stuffing around but a Roller GT 28 76R is a ripper, has a T2 footprint that wont go straight on your T03 style manifold but spools super fast and is good for 20 psi. I use this on vehicles with stock pumps as it spools so quick even with a lot of fuel turned up it dosnt smoke excessivly, also the large 4" inlet and .7 comp housing keep turbo outlet air temps lower which makes more power and delivers greater air volume at the same pressue. Pressure is overrated, its all about volume, one turbo can create 20 psi @ 120 degrees outlet temp and another 20 psi at 70 degrees outlet temp, guess which one is better, small turbos at high boost result in high turbo outlet temps that result in less power due to reduced air volume, they also create higher combustions temps for less power which is an engine killer.

Joel

[MyGQ]

I can get a T25 turbo off a 2.8L Diesel Patrol. would that work ok? would like to have the engine on boost when on the freeway so when towing it manages to keep the power up.

[azzad]

Joel

Any idea on costing of this turbo setup?

Would you be in a position to put something like this together?

Dazza

[PGS 4WD]

Too small, it will generate to much outlet air temp and will fall over quickly, probably only good to 2500 rpm. The gt2876rs will have about 3-5 psi cruise depending on vehicle weight, tyre resistance etc, The roller bearing turbo spools faster due to less internal friction too.
You'd pay about $1800 TO $2000 for trade, less if you can buy at distributor price.

Joel

[DanielS]

Its a bit of stuffing around but a Roller GT 28 76R is a ripper, has a T2 footprint that wont go straight on your T03 style manifold but spools super fast and is good for 20 psi. I use this on vehicles with stock pumps as it spools so quick even with a lot of fuel turned up it dosnt smoke excessivly, also the large 4" inlet and .7 comp housing keep turbo outlet air temps lower which makes more power and delivers greater air volume at the same pressue. Pressure is overrated, its all about volume, one turbo can create 20 psi @ 120 degrees outlet temp and another 20 psi at 70 degrees outlet temp, guess which one is better, small turbos at high boost result in high turbo outlet temps that result in less power due to reduced air volume, they also create higher combustions temps for less power which is an engine killer.

Joel

I use a garrett GT25BB 400HP, is it along the same lines Joel?
http://www.horsepowerinabox.com/HPIAB2/category12_2.htm

[PGS 4WD]

Yea we can do it, best call James at work, he does the pricing I do the tuning stuff (03) 5975 2642

Joel