Garrett G Series

[burn4005]

well they've completely tapped out the EFR on that car so i guess twins were next. the Gs are potentially more efficient than their EFR counterparts so worth a crack I suppose

[Lithium]

Yeah good on them for being the guinea cops at that kind of expense, that is a LOT of unproven turbo to jump into using on a 2.8litre turn-corners-car.  Will be very interesting to see how they perform in the real world, they do definitely seem to be not shy of pumping some air!

[etang789]

On 6/7/2018 at 7:36 AM, mr_rbman said:

Looks like the Integrated Motorsport Time Attack R34 GTR is going to twin Garrett new series turbos from a single EFR (9180 from memory) shall be interesting to see the differences, obviously custom everything, manifolds etc....

Nice cannot wait!

[GTScotT]

Will be fitting a 550.72wg to a very basic config SR20VET later this year. 

Low comp, P11/VET cam combo, franken DET/VE intake, hypex ex side. Will try access above 8000 RPM on Piss98. Hope to move close to 50lbm.

Yes, Lithium, I am still alive. I also have an R33 GTR. 

Posting for sake of what they look like in the flesh. This was the first one delivered to a customer in Aus (me). It is a highly finished product compared to last gen, I have handled all manner of GTX and EFR in the last 2 years and can say these are the prettiest. I hope it's pretty good rather than pretty average. 

Stay tuned. 

[Dale FZ1]

Do like the appearance of that housing, looking down the throat and the outlet.

[LaurelPWR]

This may be the integrated motorsport set up mentioned earlier... look like an amazing setup regardless, sporting a bunch of local Platinum fruit [emoji1362]?

 

 https://www.facebook.com/545029935656927/posts/989437111216205/

 

 

 

[LaurelPWR]

[Piggaz]

Garrett need to hurry up with their larger frame G series. 3582 size with decent T4 TS housings. ?

[r32-25t]

57 minutes ago, Piggaz said:

Garrett need to hurry up with their larger frame G series. 3582 size with decent T4 TS housings. ?

One of them would be very nice on the ute

[Piggaz]

5 hours ago, r32-25t said:

One of them would be very nice on the ute

And the GTR! ?

[fatz]

Is it on the dyno yet

 

how much whoosh did it make

[LaurelPWR]

Cut and paste post from Facebook:

Probably one of the easiest to compare, this shows boost, torque and power for a G25-660 (solid lines) vs a Gen2 GTX3076R on an EVO.

Very solid power from the frame, but not what you'd necessarily be expecting spool wise from a "2867 sized turbo"

[LaurelPWR]

Cut and paste from Facebook:

Same car, comparing with the GTX3582R it had on it earlier. THIS case shows a substantial spool improvement, but obviously needs more boost to make the same power - while it did match the GT30 psi for psi.

No question it flows very much like a GTX30 series turbo, but would have been nice if the boost threshold was much like the GT28 sized turbos like the naming would have you hope

[Snara]

Anyone have experience with Garrett GTW3684R ? 

[Lithium]

On 8/14/2018 at 9:01 AM, Snara said:

Anyone have experience with Garrett GTW3684R ? 

That's actually a GTW range turbo, a little off topic in here - but I've seen VERY little for the GTW range, most you can find is the GTW38s.  

[sneakey pete]

Apparently the twin G turbo engine made 1050 hp on the dyno with a little worse down low than the 9180 it replaced, 
probably not a bad result given the extra few hundred hp it picked up

[Lithium]

1 minute ago, sneakey pete said:

Apparently the twin G turbo engine made 1050 hp on the dyno with a little worse down low than the 9180 it replaced, 
probably not a bad result given the extra few hundred hp it picked up

Yep, pretty much as expected really - initially I thought they were saying they expected better spool than the EFR9180 which seemed like a tall ask... but it sounds like as you say, it's a reasonable amount laggier but makes >100hp more (not sure about a few hundred).  In the scheme of things - they are more turbo, they're laggier, and they make more power.

One of the more impressive things about the comparison for me was that apparently the twin G25s give nothing away to the Precision 6870 they tried, but makes more power and the 6870 fell on its face after 8000rpm - while the G25s hold on past 9000rpm. 

So yeah, as expected the G25s aren't really cooking until will into the 5000rpm range but if you've built it to rev like hell and they are holding up high then it sounds to match what they were looking for to a T.  

 

 

 

[RICE RACING]

Not a long term proposition (for engine life), currently doing a durability run on 9180 (~1000bhp) with 3.4. Aiming for 20 hours, which is a topic not discussed or understood by most be it by deception or ignorance?.

The higher rpm required for twins along with associated exponential drop in engine life running it this way means we pretty much shit canned the idea

[Lithium]

7 minutes ago, RICE RACING said:

Not a long term proposition (for engine life), currently doing a durability run on 9180 (~1000bhp) with 3.4. Aiming for 20 hours, which is a topic not discussed or understood by most be it by deception or ignorance?.

I am sure they know this, and I am sure a good percentage of the people discussing this realise that - I doubt it is either deception or ignorance so much as just like top level drag racing, time attack is pretty much getting the most you can out of a setup while still HOPEFULLY having it hold together long enough to get a result.  Its clearly not going to be an endurance engine... though those reasons are why I assumed when they said "more drivability/wider power delivery" that they were hoping it'd be more responsive earlier - not at the drag racing end of the rpm range.

It kind of backs up a lot of initial discussions of these turbos, considering wheel size wise they are comparable with GTX2867Rs or SMALLER than Trust T517Zs - they are not spool monsters by any stretch of the imagination, the G-series don't seem like a threat to EFRs in their realm however for this car the logic in why they went for them seems sound... so long as they can hardness the power delivery and keep the engine together long enough to achieve the results they are aiming for.

 

The RB34/EFR9180 combo sounds like fun!  What kind of rev range will that operate in?  In Evo world from memory the "more reliable" setups tended to be shorter stroke/longer rod combos (so nearer stock displacement as opposed to 20% more than stock) resulting in slightly less displacement - the bit of extra rpm needed to make a given power level usable was considered to often be a better reliability trade off from the effects come from the lower rod/stroke ratios the strokers resulted in.

Edited August 15, 2018 by Lithium

[mr_rbman]

These guys (Integrated / PMC) are building a car to be damn quick, not reliable longevity...

They have even gone to the extent of now running alloy rods purely to save weight etc...

They want to win WTAC oz, end of story...