New Garrett GTX2867r

[codyace]

Originally Posted by jpost

why didnt u go topmount?

A few reasons, but most of them involving the fact thta top mount setups aren't responsive enough for the track usage my car sees and my style of driving.

To me, there is no reason for top mount if you're staying at 425 whp and below. Better spool up, good power, ease of install, stock part usage etc etc. Top mount setups (in my eyes) should (at minimum) make 485-500whp or they aren't worth the hassle or cost in my eyes, as a 400-425 whp T2 bottom mount car will out perform a 450whp top mount larger frame turbo car in every aspect this side of top speed.

Cliffs: K.I.S.S.

Originally Posted by Slide~or~die

What i was really thinking about was running a T3 Turbine (Non-TS) housing with the EWG (1) Mounted like in the picture shown on a TS Manifold.

Now from what you said above i understand running a TS manifold with out a TS turbine housing isnt proper, but are there no added advantages in running a TS Manifold on a non-TS Turbine housing? In terms of spool(being the only advantage i would assume there'd be).

My though is getting an added bonus from a TS manifold (If any w/o TS Turbine Housing) and bypassing the need to run 2 EWGs by Mounting 1 on the Turbine housing as shown in earlier post. (so saving money on EWG's while decreasing spool up time)

Set-up would be top mount. Again im not an expert just thinking of something wild for my next set-up, obviously i want it to be effective this isnt for looks.(No baby shit here)


Motor is a RB25Neo.

In the grand scheme of things, running a non-TS turbine housing on a TS manifold isn't going to ever hurt performance, however to really take advantage of a 'twin scroll' setup you should have a TS turbine housing as well, as the entire point of it is to keep pulses divided to aid in performance.

The other thing you need to consider is how much the gate needs to work on your setup. While technically you always want 'priority of flow' towards the wastegate (of which 90* to flow is not priority) for optimal performance, that is not to say that doing it that way will hurt it either (other than it could limit the effectiveness of the gate)

To me, if you're spending the bucks on a TS manifold, I'd be sure to have a TS turbine housing to take advantage of it all.

Originally Posted by Seraphim38

Anyway, in principle, running a twin scroll manifold with a single scroll turbine housing may produce better results than single/single, but my guess is that in the real world the observed difference would be minimal.

........

The best setup, money no object, is a twin scroll manifold with dual wastegates and a twin scroll turbine housing. The manifold and dual wastegates are where the expense is: the turbine housings are the same price whether dual or single scroll.

Totally agree, couldn't have said it better myself.

Originally Posted by Slide~or~die

My limited understanding is Smaller AR will = quicker spool but then again its based on set up and motor so whats the deal on this?

Small A/R can generally does reduce lag, but at the time time it can also effect power in a way that negates any advantage in spooling up to a specific boost level faster. Certainly a fine art IMO. Even on my setup I give up certain stuff...such as if I had a stock intake manifold I'd have more low end, but I'd rather have the elongated powerband from the Greddy.

Originally Posted by gotta240

Is doing this to a stock .64 (on a gtx) turbo a bad idea? I have a quality turbo manifold that I want to keep, but just got a new GTX turbo and a TIAL EWG to go with it. I DO NOT want to go with the stock manifold set-up(YET) but Im also not looking forward to trying to modify my tubular manifold and somehow fit/plumb the EWG in. The above pic seems like a good concept but is that going to be bad for the turbo? IE: weaken housing, warp housing?

Thanks in advance.

It won't hurt anything, but will require some specific fabrication to angle the gate to fit in that area. It will certainly require a 90* bend, and another v band clamp/flanges to make that work too.

Originally Posted by rbs14kouki

FYI guys ; Fullrace makes a twin scroll mani with no ewg provision ... they do this as an option of course because of the efr turbo they sale !

True, but EFR sucks :P