dasher

Plenty of talk about the SC series ... lets talk about their GT series now.
their website seems to lack information so I'll leave it to you guys....

GT32E
GT32B
GT35
GT35E
GT35B
GT35S
GT37
GT37E
GT37S

Here what I need to know :
Compressor Efficiency maps? (most likely I wont see these)
Which ones are 4 bolt turbine housings?
Comparable to Garrett's GT25R or GT30?
Wet bearing housings? Which Ones?
Internally wastegated, which ones?
Trim? A/R? ect ....

Rod Short

These are just regular Garrett GT Technology turbos. All specs can be viewed on their downloadable catalog at http://www.turbobygarrett.com. I will investigate our web site further and see what I can do to get better information on there.

The "E", "B", etc. suffix denotes what compressor cover is on the turbo.

All of the compressor efficiency maps can be found on the downloadable Garrett catalog I mentioned. Garrett considers their maps to be proprietary information, which is why you usually not find them from Garrett outlet. I'm not particularly thrilled by that, but it's a business decision they have made.

Flipping thru the catalog, you'll see that most of the higher hp versions have V-band discharge sides. There are also 4 and 6-bolt round discharge sides.

Garrett does not have the GT25R in their catalog, or the GT28R for that matter. The GT30R is sold as a kit, which means that it comes without an exhaust housing. So, I can build this with any number of different ways.

The only CHRA's that are water cooled are on the ball bearing turbos, GT28R, GT30R, GT35R and GT42R

The smaller ones are usually internally gated. The GT28R definitely is. Again, you can check the more detailed specs from the downloadable Garrett catalog.

Hop this helps you.

Rod Short
Sales Manager
Precision Turbo

dasher

thanks for the info ...
Interested on the Gt-30R .... the website doesn't seem to list any of the prices for true ball bearing turbos... I guess you don't want to scare customers because they tend to be pricey.... somewhere between $1000-1500? If its on the lower end of that range(doubtful, yet hopeful) I'll pick one up...

dasher

I guess this is about the time when I get PM's from Precision dealers ... Arturbo, Paul_Vang? Lets see if we can work something out or please let me know if I'm unrealistically dreaming about the cost.

Rod Short

I know that Art Turbo is in California racing this weekend. Here's what I sell the Garrett dual ball bearing turbos for:

GT28R w/ internal wastegate Retail $ 960.00
GT30R $1187.50
GT35R $1897.50

Dealer prices are significantly less. I may have Precision dealers who will sell these for less, but I cannot undercut them. I think you'll find these prices are less than HKS.

hybrid901

Do these turbos have a t3 exhaust flange? What kinda power is the GT35R good for?

alpha

Yes. I would recommend and run these turbochargers before I ran an HKS turbocharger. Don't get me wrong. HKS turbochargers are nice but for the price, work put into them and power you can get from them the Garrett GT / Precision Race turbochargers are the best ... IMHO.

dasher

I remember you saying a while back that the GT35R is supposed to spool between 400-800 rpm sooner .... would similiar results show with the GT30R?

Has anyone had any experience with these turbos?

since I cant look at the compressor map will these turbo's work well in the efficiency range of 10-11 psi?(I want to stick with the stock map sensor because of the better tunning resolution)

dasher

I hear the choices between the GT-30R are between .58 .68 .81 or .96 A/r for the turbine side...

so the turbo specs will be if I choose .68 A/r turbine---
Compressor side
Wheel Dia. - 76.2mm Wheel Trim - 56 A/R - 0.6

Turbine side
Wheel Dia. - 60mm Wheel Trim - 84 A/R - 0.68

How does this sound ? Looking to have this work in a B18C1 at 11 psi (93 octane) with all the right components and compression dropped 1 via a cometic 3mm headgasket for safe tuning(engine not built).

With the compressor efficiency maps being unavailable and the relative spool characteristics being unknown (400 -800RPM sooner) do you think this is a streetable turbo?