GTX 2863R

[OjiGeorge]

I've been looking at some turbo maps and wanted to get some forum feedback.

What do you guys think of the GTX 2863R?
http://www.atpturbo.com/root/release...365-1_comp.jpg

I've been looking at its maps and it seems very well suited for the low boost many of us are planning to run on pump gas. Also this turbo looks to have a lot more potential than the disco potato for future upgrades if the user wants to get a little crazy.
http://www.atpturbo.com/root/release...s-GT2860RS.jpg

How come the GT2871R is getting more love?
http://www.maptun.com/shopProduct.php?pid=2443

Doesn't seem near as well suited for those planning to stay on stock internals & pump.

Thoughts?

[ft_sjo]

What about the turbine maps?

[Outlawstar98]

GT2871R gets more love due to the fact that turbo has been around for awhile. The GTX series is awesome though! GTX2863R Is a nice turbo IMHO.

[FullBlown]

We have tested the GTX2863r vs the GTX2867r and GT2871r. Spool wise there isn't enough gain from the GTX2863 vs the GTX2867 to make it worth going with the smaller compressor wheel. All three turbo's run the same turbine wheel and that is going to dictate most of your spool characteristics on a small turbo like this.

[OrbitalEllipses]

Originally Posted by FullBlown

We have tested the GTX2863r vs the GTX2867r and GT2871r. Spool wise there isn't enough gain from the GTX2863 vs the GTX2867 to make it worth going with the smaller compressor wheel. All three turbo's run the same turbine wheel and that is going to dictate most of your spool characteristics on a small turbo like this.

I've heard this about quite a few of the GTX series turbos.

[Coheed]

The GT2871r is a dog compared to the response you get from a 2860rs. If I could have the response of the disco, with potential for 400whp, I'd jump on the GTX2860 or the 2863r.

300rpm spool increase from the 2867 to the 2863 is quite substantial. Even though the 67 will make more power on less boost, depending on setup. If you are wanting max power potential from the 2867r, you might as well step up to the 3071r.

[OjiGeorge]

Would the spool difference between the 2860rs and the 2867r be even greater than 300RPM?

[SkullWorks]

I haven't played with any GTX's yet but I run a FP HTA wheel in my GT28's (they call it a 2868) it is a billet compressor wheel, and probably a good part of the reason Garrett started making the GTX line up, the turbine and CHA are pure Garrett GT28


I absolutely LOVE the spool of the 2868 and the flow is better than the GT2871 it replaced, I would tend to believe that with the TiAl V-Band Housing and billet compressor wheel that this combo out spools a 2860rs ALL DAY LONG, My 2.0l SR20VET puts 450 to the wheels (not hubs) on a big Dynojet known for breaking hearts, (god knows it has broken mine time and again)

I wouldn't expect anything less from these new Factory wheels in the GTX lineup,

According to my sources at Garrett the 63mm wheel still flows almost the same as an old 71...

[Coheed]

Originally Posted by SkullWorks

I haven't played with any GTX's yet but I run a FP HTA wheel in my GT28's (they call it a 2868) it is a billet compressor wheel, and probably a good part of the reason Garrett started making the GTX line up, the turbine and CHA are pure Garrett GT28


I absolutely LOVE the spool of the 2868 and the flow is better than the GT2871 it replaced, I would tend to believe that with the TiAl V-Band Housing and billet compressor wheel that this combo out spools a 2860rs ALL DAY LONG, My 2.0l SR20VET puts 450 to the wheels (not hubs) on a big Dynojet known for breaking hearts, (god knows it has broken mine time and again)

I wouldn't expect anything less from these new Factory wheels in the GTX lineup,

According to my sources at Garrett the 63mm wheel still flows almost the same as an old 71...

Ah, a fellow SR20VET guy. Nice to see I'm not the only convert on this site! I built my SR20VE-T over the course of 7 years. I did tons of R&D for the platform and contributed heavily to the SR community (FWD though).

I am hoping what you say about your billet turbo is true, though I am skeptical the response of the Garrett will be as good. Mostly because there are more full-length blades than the HTA stuff. That means more weight towards the outside of the moment, and likely more lag. Even enough more to offset any gains the lighter wheel may have.

I love the RS turbo. Great little turbo, and goes like crazy. Its like a lightswitch. Cruising around is economical, but sweeping past 3500rpm results in V8 power output instantaneously.

I'm hoping the 63r will have a little more oomph up top. And it seems to match the turbine a little better. Perhaps the 67r is the one to go with, but realistically it is much easier on the engine to make 67r-power-levels with the T30 turbine.

But the spool difference between the two is really close! I would expect the smaller compressors to offer better transient response though. The GTx2860r looks like a disco on steroids!

Of course, I like the turbos capable of higher pressure ratios, not because I plan on pushing a ton of boost... but rather, I live at high elevation as well. And it is important to maintain high compressor efficiency in those higher PR regions where I'm at. Otherwise, the turbo cooks the air instead of moving it.