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Thinking of getting a Garrett GTW3684

 
Old 08-31-2018, 07:55 AM
  #11  
 
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thanks for your review op. staying on topic on affordability, i think i have you beat LOL. i have an even cheaper garrett t3 60 trim journal bearing -58mm- turbo. It's rated at 500hp at the crank, which i've exceeded and running at 515whp. Boost comes on descent at around 5000rpm. It has a fat power band and is very responsive for a jb turbo. I'm guessing prob because of its small frame. Very cheap, very reliable turbo for those seeking to stay at 500 or less whp. might upgrade to the garrett 60-1 at some point to make 600whp.
here's my dyno graph at 499whp and 367wtq:
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Old 09-02-2018, 07:31 AM
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Originally Posted by Mijae007 View Post
thanks for your review op. staying on topic on affordability, i think i have you beat LOL. i have an even cheaper garrett t3 60 trim journal bearing -58mm- turbo. It's rated at 500hp at the crank, which i've exceeded and running at 515whp. Boost comes on descent at around 5000rpm. It has a fat power band and is very responsive for a jb turbo. I'm guessing prob because of its small frame. Very cheap, very reliable turbo for those seeking to stay at 500 or less whp. might upgrade to the garrett 60-1 at some point to make 600whp.
here's my dyno graph at 499whp and 367wtq:
Wow nice numbers!

Just a theory though, I think on pump gas an old school 58mm Garrett would struggle with 500whp on Dynojet?
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Old 09-03-2018, 10:53 AM
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Originally Posted by HPC View Post
So just an update

After 1 year of my turbo stuff lying around the shop I found the time to do the install and tuning it. All of the custom fabrication was done at my shop and tune on the ECU by me. So here are the basics of my setup:

Garrett GTW3684 journal bearing turbo
AEM Series 2 ECU
AEM fuel rail + reg
AEM 340lph fuel pump
AEM water/meth injection (50/50 on smallest jet)
ID1050X injectors
TiAL BOV and WG
ACT HD clutch
F20C bone stock except for AP2 retainers


Heres my dyno on low boost (11 psi) and high boost (16-17 psi) both on pump gas with the water/meth turned on only at high boost


Overall, I’d say the turbo isn’t spectacular nor garbage. It performed just the way I’d expect it to be and made the power expected (could have pushed maybe up to 530-540+ at same 16-17 psi). It spools a bit late (full boost comes on at 6,000-6,500) so its not something I’d call a responsive turbo on our platform. Given the price though, it’s a good option to Precisions 6262JB series and to BW S300s if youre targeting the same numbers as I did on pump gas



For your given power level, a GTW3476 would have been a better fit. It's good for 550whp or so and would probably spool 500-750rpm faster than the GTW3684 (which is a 750whp turbo).
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Old 09-12-2018, 10:08 AM
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Originally Posted by spdracerut View Post
For your given power level, a GTW3476 would have been a better fit. It's good for 550whp or so and would probably spool 500-750rpm faster than the GTW3684 (which is a 750whp turbo).
The GTW3476 is theoretically good for below 500whp on pump gas on a Dynojet. Just look at the common numbers a PTE5858 or GT3076 produce on F20C engines

On E85 3476 can go 550 or thereabouts but Im not running nor planning to go to E85 anytime soon
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Old 09-12-2018, 01:08 PM
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Originally Posted by Monozukuri View Post
I was really hoping the EFR turbos would offer us the responsiveness whilst still using turbine wheels large enough to match the flow of our motors.

Gtx30 running over 500hp is a ticking time bomb imo
i been running my gen 1 gtx3076r at 588whp for many many years now. The new gen 2 gtx3076r is ratted at about 200hp more at 750hp.
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Old 09-12-2018, 05:31 PM
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Originally Posted by HPC View Post


The GTW3476 is theoretically good for below 500whp on pump gas on a Dynojet. Just look at the common numbers a PTE5858 or GT3076 produce on F20C engines

On E85 3476 can go 550 or thereabouts but Im not running nor planning to go to E85 anytime soon
Correct, 550whp on E85. However, you're only making 500whp with the 3684 and I bet the 3476 would be damn close to 500whp with the 50/50 water meth you're using. Let's just say the 3476 only does 475whp with the water/meth, you'd still gain a ton of area under the curve and have a much faster car.
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Old 09-13-2018, 04:36 PM
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Originally Posted by spdracerut View Post
Correct, 550whp on E85. However, you're only making 500whp with the 3684 and I bet the 3476 would be damn close to 500whp with the 50/50 water meth you're using. Let's just say the 3476 only does 475whp with the water/meth, you'd still gain a ton of area under the curve and have a much faster car.
515 > 475 still as long as the car doesnt fall flat on its face when you shift at full rpm, which this doesnt thankfully. The area under the curve will be greater since youre looking at only the area from 6500 something upwards. I think this is a better choice for my application since I do mostly 3rd to 5th gear full rpm runs and I am traction limited on a turbo thats as torquey down low as a say 3076.

For track / circuit purposes this would be a stupid purchase obviously, but thats not what I do. And I also think that a 3476 would walk over this on short spurts especially when the 3684 is in the wrong gear at the wrong rpm (which sucks really).

Given my relatively traction limited setup, the less brutal punch of the quite laggy turbo is more favorable actually. But of course we all know given the right parts and budget, these cars can be setup to hook up nicey even with the punch the smaller turbos produce
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Old 11-19-2018, 02:24 PM
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OP how are you liking this turbo after having it on the car for a while? Have you upped the boost at all? T04S compressor cover correct? I am eyeing the same turbo same Tial style .82 vband in/out turbine housing - looking for an affordable option that will make north of 600 whp comfortably.
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Old 12-20-2018, 04:28 PM
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Originally Posted by MrSmith View Post
OP how are you liking this turbo after having it on the car for a while? Have you upped the boost at all? T04S compressor cover correct? I am eyeing the same turbo same Tial style .82 vband in/out turbine housing - looking for an affordable option that will make north of 600 whp comfortably.
So far everything still works just as it did before. Did numerous highway pulls with other cars and a few track day events but drove the car relatively gently only. Surprisingly spool/lag is not much of a concern as I expected around the circuit.

No sorry still on 17 peak psi only. Tried to do a bit of 20 psi pulls on the street when I got bored but brought it down again lol

Yes correct S housing cover

Honestly, I think you would be better off with the 3884 if you want to do 600 and still have a bit more elbow room in the future. By the look of things this will do 650-700ish on E85 but might be a bit pushing it already

I have currently ordered a dual pump hanger and ID2000s plus flex fuel sensor so I just might see where this turbo taps out before replacing it. That is if I find the time to install parts soon
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Old 12-21-2018, 09:51 AM
  #20  
 
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People got money. The GTW is still a $1000+ turbo. The GTX series are near $2000. You can also consider t3 60 trim and 60-1 jb garrett turbos for $750. For those on a budget. Still make +/- 500whp. Obviously, you pay to play. The more you pay the better the turbo characteristics will be. But for the average joe, best bang for the buck, can still hit a solid 500whp with <$1k turbos and still have reliability of a garrett. I'd love to run another s2k with similar hp with an expensive gtx turbo and try to see any performance differences.
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