turbo website question

[kanchou]

http://www.egarrett.com/products/gt_15_25.jsp

is this the same one used in pontiacs from the late 80s, early 90s?

[Corpse]

Nope, that is a different lineup. The Grand National I think usually used a strange T3, I think the Turbo grand Prix used a T25 and something like a turbo 4 cyl would probably use the T25. I dunno for sure.

-Dave

[kanchou]

i just remember googling the heck out of the model and part number i got from w-body site, and this was the closest thing to a manufacturer i could find.

[phantom505]

Garrett doesn't put "old" technology on their website. However the T3/T4 hybrid is usuallly as good if not better than their newer ones. The newer ones have less moving parts, but they never really optimized the wheels themselves. They sort of just moved on.

Anyhow, there are several companies that will match a turbo to your needs. I would go with a T3/T4 hybrid with a smallish A/R for a 4 banger.

Seeing as you have no profile it's hard for me to answer.

[Corpse]

Depending on the four cylinder being used, I'd stick with one of the T3 60 or Super 60 trims. I don't see much point of the Hybrid on a four cylinder unless you are shooting for some high numbers.

If it's a DOHC like the Quad4 or new Ecotecs though, you may want to try either the Super 60 or the Hybrid as mentioned. Although, the T3 60 trim will probably work better for you to start with.

but then again, it all comes down to the actual A/R turbine and compressor. And your engine.

-Dave

[kanchou]

i was just curious because of the interesting info i was finding on the beretta indy pace car, the awd pontiac 6000, and the pontiac gtp from the mid~late 80s.

I don't have any short term plans, tho. I drive a wrx. I was thinking of a major project later with a corsica...

[Corpse]

Oh well, you should look up the article on the twin turbo AWD Beretta prototype, made like 385 horse. Of course, I liked the T-OHC V8 Beretta, 350 Beretta and Feretta prototypes equally aswell.

There were like car & drive articles or something on these prototypes I listed above. Some sweet cars. GM used hubcaps on the twin turbo car to make it look like a grocery getter if someone were to drive it on the road. hehe

This goes to the twin turbo article http://www.hotrod.com/featuredvehicl...op/index5.html



Nice.

-Dave

[kanchou]

Yeah, thats part of the piece. I read about that, , then on this site:

http://www.w-body.com/motors/index.html

I saw this link:

http://www.w-body.com/motors/vin-v.html

which was a turbocharged Grand Prix 3.1 option on 89, and 90. it had this to say about the turbo::

Garrett T-25, water cooled
Model #: TB2528
Part #: 465939-2
CHRA #: 431876-29
Wastegate: Vacuum, actuated by ECM-controlled solenoid
A/R Ratios: 0.68 Turbine; 0.80 Compressor


this is the main reason whay i asked: Is this the same turbo as this?

http://www.egarrett.com/products/gt_15_25.jsp

{the main reason for this idea?

Corsica, despite being a 4-door, is a smaller, lighter L body with all the same components, & fits the same suspension performance parts. if they made the drivetrain from the 6000 work on a beretta, its a conceivable project for a corsica. Great sleeper.}

[skalor]

I wouldn't bother with the TGP T-25 as it's way too small of a turbo to make any kind of decent power. If I were you at the smallest I would look at a GT28 or GT30 if you want a very quick spool. I want to get a GT28RS (or even a GT2871R if the price is right). This is almost a direct drop-in for the TGP t-25 and has a bigger A/R on the turbine housing and a much larger compressor housing. The GT28RS is commonly referred to as the "Disco Potato", and is state-of-the-art is terms of the wheels and the fact that it's dual ball-bearing.

[kanchou]

thats fine, and i appreciate the advice.

But i still want to know, if those turbos i'm pointing out are one in the same...

[phantom505]

Not even close. The GT have a completely different bearing system and much fewer parts. Anything T-Anything is fairly old school. However, if you have something like I do, a clipped exhaust wheel, then the old school still out performs the new school.

[skalor]

No, the ones you have linked to are ballbearing...hence the GT in GT25. You want a T25 with the A/R ratios listed in the W-body website. Will the ones you listed bolt-in...yes since they use the T2 turbine inlet flange, but they are way too small. The T25 used the the TGP is small, and the ones you linked to are even smaller. I would use those on a 3-cylinder metro.

[kanchou]

okay, thanks alot. I was wondering because I figured many turbocharger designs still being used are over 15 years old, both in japan, and the west.

(to recap)
SO skeletally they are similar, but the guts and airflow stats are different?

[phantom505]

http://www.turbobygarrett.com/turbobygarrett/images/Leaflets3_1.jpg

Hard to read, but I think that's what you were looking for.

[kanchou]

ahhh

nahwlej