Garrett Medium Frame Gtx Turbos

[ShiftyTys]

That sounds like a normal GT3076 that kind of power, keen to see the dyno sheet to see how much laggier it is compared to a GT3076

They stopped intentionaly as I don't have internals. They can see this doing close to 350. No worries.

Will post the sheet when I have it.

[Rolls]

Why didn't you go a GT3071 then? would have a bit less similar power on 18-20psi but with much much better response

[ShiftyTys]

Future proofing

[ShiftyTys]

There we go.

[wolverine]

100rwkw at 3900rpm is pretty late making power.

Do you have a plot of boost as well? It seems to be in quite late which makes me wonder if there is some improvements to be had with better boost control.

[ShiftyTys]

100rwkw at 3900rpm is pretty late making power.

Do you have a plot of boost as well? It seems to be in quite late which makes me wonder if there is some improvements to be had with better boost control.

I will get that chart. Definately. I'm using a gizzmo IBC. U recon a better one will bring.power on sooner.

[wolverine]

The Gizzmo should be fine but there might be issues with pre-load on the wastegate or vaccuum leaks.

It seems like there is still some room to optimise it.

[Jap_star]

thats worse than my 3076r. mine makes 270@16psi on a mainline for reference internally gated

[ShiftyTys]

thats worse than my 3076r. mine makes 270@16psi on a mainline for reference internally gated

Don't look at power every dyno is different. Shape of chart is more important. So its laggier than gt3076?

[Jap_star]

.63 or .82 rear? internally gated or external?

it 'looks' a touch laggy. how does it drive?

[Rolls]

Don't look at power every dyno is different. Shape of chart is more important. So its laggier than gt3076?

General consensus is the GTX version of all these turbos will be laggier.

[ShiftyTys]

.63 or .82 rear? internally gated or external?

it 'looks' a touch laggy. how does it drive?

.82

Drives very smooth. Have to admit. I wouldn't mind removing a big of lag. Just a bit. However im coming from stock turbo maybe om not that used to it. Wat things can reduce lag? Once it up and boogies it pulls like a freight train though. Lol

[GravyGarage]

General consensus is the GTX version of all these turbos will be laggier.

Really? Wasnt their goal to bring boost on earlier with the gtx?

[Rolls]

Really? Wasnt their goal to bring boost on earlier with the gtx?

Compare the flow maps, they flow more in the higher boost levels mainly, but also tend to be more comparable with a slightly bigger version of the same turbo. Read all of this thread, lots of pretty graphs to look at.

What made you think that?

Edited June 19, 2011 by Rolls

[R31Nismoid]

4800rpm for 200rwkw, ugh... Much lagging compared to a 3076

But its similar to a GTand that's pretty much where a GTX3076 sits for comparo.

unfortunately it seems Garretts GTX3x frame isn't living upto the claims

[GravyGarage]

Compare the flow maps, they flow more in the higher boost levels mainly, but also tend to be more comparable with a slightly bigger version of the same turbo. Read all of this thread, lots of pretty graphs to look at.

What made you think that?

Ah ok. Have read all of the thread will be looking at getting a 3076 soon.

Dont know how I got that idea, mabey just saw the new model and presumed it would be better haha.

[D_Stirls]

i would be interested to see a plot of a GT3040 (GT3082R) Vs' a GTX3076R as i think they will be pretty similar.

Really? Wasnt their goal to bring boost on earlier with the gtx?

Personally i think that that GTX range was an attempt to gain back a bit of the market share that they were beginning to lose to other performance turbo brands like Precision and Borg Warner. They seem to have been caught napping a bit and while the others were designing completely new turbos Garrett were relying on their now old GT range and didn't seem to be working on anything new.

That is also the reason why i think that the wheels are billet as the time from design to production is a lot less with a billet part than cast, and it also means that they can easily tweek the design without the expense of re tooling.

The GTX range at the end of the day is nothing more than an updated compressor, it's not a completely new turbo just a touch up on the old design.

Edited June 19, 2011 by D_Stirls

[Lithium]

I do remember the first releases on the GTX implied they would be at least as responsive as the GT, but I have been suspicious of that claim from the start... however this result looks too laggy. I suspect something isn't right somewhere, probably a leak of some sort more than boost control.

For what its worth, the GTX3076R would really be a GTX3077R if Garrett stuck to their normal naming conventions.

[ShiftyTys]

I do remember the first releases on the GTX implied they would be at least as responsive as the GT, but I have been suspicious of that claim from the start... however this result looks too laggy. I suspect something isn't right somewhere, probably a leak of some sort more than boost control.

For what its worth, the GTX3076R would really be a GTX3077R if Garrett stuck to their normal naming conventions.

Anyone else actually got one of these? So I can compare how abnormally lsggy might e is. Ugh.

[juggernaut1]

i would be interested to see a plot of a GT3040 (GT3082R) Vs' a GTX3076R as i think they will be pretty similar.

Someone previously posted on here (I think it was Ozz) on an SR20 they were virtually identical - you'd be forgiven thinking they were the same turbo on different dyno runs.

Found it on another forum - scroll down to post 37.

http://www.silviawa.com/forums/index.php?showtopic=58974&st=20