We have sold a couple turbo kits now, the turbo kit on our car should be completed shortly so hopefully we can get some results out for everyone.

Thanks!

Micahel

 

If I could get them to throw me a hookup on one of their kits I would be willing to pay around 75% of it, but I can't afford a full kit. I guess I'll have to get the 3076r.

 

I would really like to see someone do a direct comparison between the 3071R, 3076R, Blouch Dom 2, and FP Red. Of course dyno results on the gt30s would be a nice first step.

 

There's a guy in Japan that has good data on the stock turbo and Dom 2. He's putting on the 3076 shortly.

My best guess:
Dom 2 uses the same wheels as the 3076R. So it'll spool up faster due to the small stock turbine housing compared to the much bigger turbine housing of the 3076R, but that small turbine housing will choke the flow up top. So the 3076R will make more power. Also, you'll probably get some compressor surge with the Dom 2 whereas both Garrett turbos have a ported shroud to prevent surge.

As for Dom 2 vs. 3071R. They use the same turbine wheel, but the Dom 2 has the 76mm compressor wheel vs the 71mm wheel in the 3071R. I think the 3071R has a bigger turbine housing. Now, the Garrett housing is optimally designed for it's turbine wheel whereas the Dom 2 stuffs the 60mm wheel in the stock housing, so non-optimal as the 60mm Garrett wheel has significantly different geometry than the stock turbine wheel. So... I think the 3071R will spool faster and make the same power as the Dom 2.

As for the FP Red, I'm not sure what turbine wheel it uses, but it seems the Dom 2 makes more power on pump gas. So I'm guessing the Dom 2 with the Garrett turbine wheel flows better than whatever turbine wheel is in the FP Red. So I think the 3071R will spool as fast or faster than the Red and make more power on pump. And the Red gets surge too.

 

I would be shocked if that(more power) was the case.

The red flows a good bit more air than a 30R, either 3071 or 3076, the red is only a couple lbs per minute behind a 35R.


Scorke

 

Well, that's why I said 'pump' gas Especially the 91 crap out here in Cali. I'm guessing that the turbine wheel of the Red doesn't flow as well as the 60mm Garrett wheel based on the observation that the Dom 2 seems to make more power than the Red. You can put a on a 100mm compressor wheel, but if you pair it with a 20mm turbine wheel, it's not going to do squat.

If I'm right, then the Red is creating a lot of backpressure in the exhaust manifold which is limiting it's effectiveness on pump gas.

But it's all just speculation at this point! No real data either way.

 

The FP Red uses a 35r sized turbine wheel and an HTA76 compressor wheel. The compressor flows more than the standard Garrett 30R (60 lb/min for the Red vs. 52-53 lb/min in the Garrett 3076R. Guessing the small stock turbine housing with that size wheel is choking the exhaust flow on pump gas. Honestly I want to see someone take advantage of the bigger turbine housing on the Evo X 3076R upgrade and fit new turbine/compressor wheels in that and see what it will do. With no data though it's really hard to tell if it is even necessary ...

 

Does anyone have a link to something I can read to learn about turbo selections and what the numbers mean in all of them? I'm getting some just through this discussion, but want to complete the puzzle.

 

If the FP Red for the Evo X uses the stock housing then the compressor side is the biggest chokepoint on the turbo no matter what wheel it uses. Of course if power was somehow "not enough" then modifying the new GT3076R housing for larger internals should also be possible down the road as there is plenty of meat there.

I really like the anti-surge compressor inlet on the GT3076R and only the evo 8/9 has that option now for the FP Red. The changes I made to my MIVEC maps for an extra 300 rpm spool will actually let me use the spoolup without hitting the surge line and get some decent low end torque. For pump gas I think this is going to be a really great turbo as running 35 psi on race gas to get big numbers isn't what everyone is wanting to do.

 

Excalibur this may help:

A Guide To Garrett’s "GT" Model Numbers

GTxxyyzz:

Positions "xx" refers to the frame size of the turbine wheel inducer.
For example the "GT28" in "GT2860RS" refers to its turbine wheel frame size family. All GT28 units use a turbine wheel with 53.85mm inducer diameter
As a rule of thumb, the larger the number, the larger the turbine wheel.
Positions "yy" designate the compressor wheel exducer (major) diameter in millimeters
The "60" in the GT2860RS example above has a 60mm compressor wheel exducer diameter.
Note: Wheel sizes 100mm and over omit the "1" (hundreds digit)
Example: the 02 in a GT4202 refers to its 102mm compressor wheel exducer diameter
Positions "zz" may be used to designate special features of a particular turbocharger where applicable
Example: GT2860RS
"R" = this is a Ball Bearing unit
"S" = used for units which require some differentiation from units in the same family
Compare a GT2860R to a GT2860RS. While both are ball bearing and externally similar, the GT2860RS is better suited for higher-flow applications than the GT2860R. In this case, the S reflects the higher-flowing nature of the GT2860RS

 

Here is the link with a lot of good info on the basics of a turbo systems/selection:

http://www.turbobygarrett.com/turbob...ch_center.html

 

Which turbo do you think will support 500whp easier?

 

On pump gas you probably going to have to go with 35R. The others are all too small I believe.

 

Thank you sir.

 

Tomorrow is the big day...dyno sheets soon!