Darwantae951

Did he tell you what it was? Is he going to keep your old parts and break off some of the price?

95ONE

The larger A/R option on this turbo is not going to hurt you but a few hundred RPM.
It will spool well below redline.

Either They're retarded, or its not a GT30
The hotside is what determines Garrett's Turbos.

If its a GT30, then you know EXACTLY what the hotside is.

A GT30 is NOT too big. even with larger A/R. once again, if this is a GT3076R, then they are fooling you into thinking they have a clue what they are talking about.

Here's a quote from Garrett's web page to hopefully clear things up

"In our product catalog, all offerings are grouped according to their turbine wheel frame size. The frame size of a turbo or CHRA is dictated by its turbine wheel inducer diameter . "

----insert explanation - inducer on the hotside is the LARGER part of the fins.

"The larger the turbine inducer, the bigger the frame size-- so any turbo in the GT42 family has a larger turbine wheel inducer than those in the GT35 family, and so on. "

The A/R in the picture doesn't seem that large. If it's a GT3076R. It's a great turbo. - install it if you can - But.

I guess after all that ranting our conclusions are the same. Going to a lower A/R is probably a good idea. But I'm trying to stop internet myth from getting out of hand.

Darwantae951

Ok, so both the compressor and turbine wheels have an "inducer" and "exducer"?

95ONE

Yes, but Inducer on the compressor side is the smaller part. (Defined as Air flows in) and Inducer on the Turbine (Hot) side inducer is the larger part (Where air flows in from exhaust) see?
Exducer on compressor is larger side - air flows out
Exducer on Turbine is smaller part facing exhaust - air flows out.

A/R is just the size of the snail
GT3076R T3 have 3 A/R options... .63 / .82 (mine) / & larger 1.06

Darwantae951

What point of the "snail" is measured?

spoolin51

Well actually he said that the Hot housing is way to big. Ill get the numbers from him tommorow on the hot side of the turbo. Also the fact that he is trying to put it under a stock intake manifold. He did give me a discount and he will send the original hot housing back to me. Im just a bit confused now. I'll have to do some more research.....

blown 944

that is the air ratio between the outlet on the exhaust and the throat area. It is the ratio of the inlet on the compressor housing.

W..... you should be able to just look at the snail and see what hotside it is.

spoolin51

Ok on my turbo the Hot side is A/R 1.06

special tool

That is too large for ANY 2.5 951 that revs under 8,000.
This is a custom turbo - did someone make this turbocharger for your 951 without asking the rev range and capacity of the engine?

Your screen name is pretty ironic, dude...

333pg333

"Your screen name is pretty ironic, dude..." not bad ST, not bad

special tool

I only joke because now he is on the right track.

spoolin51

When I first bought this turbo (over a year ago) I didnt know much about this stuff, and I'm still learning. But yes it was a "hybrid" turbo. The reason I bought this turbo from a T1racedevelopment is: 1, they are right down the street from me. 2, he is an authorized Garrett dealer. I didnt want to go on ebay and end up purchasing a fake turbo made in china just to save 2-300 dollars. I did give the dealer the specs on my 951 however I guess he didnt do his job. I originally wanted the gt35r, but he insisted that since I only redline at 6500 I would get a better response from a 30R. Anyways so now we have ordered a .63 A/R.

95ONE

Tony at T-1 is fantastic.
the 1.06A/R is basically trying to reach the lower power levels of a GT35 without all the lag. (GT30R rated at 600rwhp)
Tony is also used to whiny little kids complaining that their Honda isn't making 750hp like their buddy's Civic Hatch. So... take it anyway you want. But Tony knows def knows what he is doing, but making customers happy is another thing all together sometimes. He's probably pleased your going with a smaller A/R.
you stated that he talked you into the smaller GT30 and probably ordered the larger A/R as a compromise for YOU!
Spooling. I understand you're listening to these guys on here and our comments (including my own) are sometimes extreme. Using words like NEVER, and Can't. But. like I said, I think Tony did his job by talking you into the smaller GT30 - even if it was with the larger A/R. (Which I think he did because you were asking for the larger turbo)

your'e in good hands and are lucky to have him down the street.
Is the Silver Widebody NSX still sitting in corner?

spoolin51

950ne: Well that is good news for me. And actually you are probably right about the whole gt35r thing. If I had my way and got that 35R I would probably be disappointed. So it makes sense. I am still going to keep my 1.06 housing maybe I'll give it to Tony and he can have some use for it. As for the NSX, the last time I was there I did see it . Once I get all my stuff my original plan was to take the car to Tony and get it tuned by him. (since he is such a bad *** tuner) Plus he seems to be freinds with my brother.

Porschefile

Yep, 1.06a/r is definitely overkill. A .82a/r would work just fine and wouldn't be laggy, though the 951 really doesn't have the rpm to take advantage of that extra flow on the top end. A .63a/r would be a better match for a 951 considering the low rpm range.

Just make sure the shop doesn't screw you and that they get you a TRUE Garrett GT series v-band hotside. Many shops cheap out and just go with a standard T series hotside. Either will work fine, and the difference probably isn't that substantial, but IMO personally I'd rather have it all true GT series than any hybrid crap. YMMV