Honeywell GTX Gen2

[mrf]

Found this article on MotoIQ and was surprised by how much the compressor map has grown especially to the left/surgeline. Are all new turbos this good?
http://www.motoiq.com/MagazineArticl...-GTX-Gen2.aspx

Also some nice intuitive math to show how to select the correct turbo.

Anyone want to calculate what turbo we need for a a 3.0L that spools adquately by 3000RPM?

Thanks.

[PEI330Ci]

Also some nice intuitive math to show how to select the correct turbo.

Anyone want to calculate what turbo we need for a a 3.0L that spools adquately by 3000RPM?

Thanks.

GTX55

Or you could use the "nice intuitive math"...


Does BoostAdvisor work for you on the Honeywell website? (Legitimate question)

[e30polak]

Anyone want to calculate what turbo we need for a a 3.0L that spools adquately by 3000RPM?

Thanks.

Depends on your definition of spool and the power goals you have. Full boost by 3k, or starts making boost/ "spooling" at 3k?

[FromSVTtoM3]

I may end up considering changing out my turbo, Comp Turbo CT-4 Billet Triplex Ceramic BB 6065 with .81 T4 V-band exit. My power goal is 400-450whp and no more than 500. This is on an autox car that also does track days. Good response/spool with the desired power is my goal. I'm ok with going a little bigger turbo than necessary so that I can run less boost to achieve my power (ie less overheating on longer track day sessions). My current turbo isn't bad. 430whp on 12psi, but peak torque was around 4,500.

[wazzu70]

The GTX gen2 is a Honeywell answer to BorgWarners EFR. If the Gen2 is not a lot cheaper I'd go with the Borg as the Garrett still uses old turbine tech.

[pbonsalb]

Consider an EFR8374. If using the steedspeed twinscroll manifold you will need the internal gate version to supplement the external gate. If on an open manifold the external gate version will be fine. Good for more power than your goal but very responsive.

I may end up considering changing out my turbo, Comp Turbo CT-4 Billet Triplex Ceramic BB 6065 with .81 T4 V-band exit. My power goal is 400-450whp and no more than 500. This is on an autox car that also does track days. Good response/spool with the desired power is my goal. I'm ok with going a little bigger turbo than necessary so that I can run less boost to achieve my power (ie less overheating on longer track day sessions). My current turbo isn't bad. 430whp on 12psi, but peak torque was around 4,500.

[FromSVTtoM3]

Consider an EFR8374. If using the steedspeed twinscroll manifold you will need the internal gate version to supplement the external gate. If on an open manifold the external gate version will be fine. Good for more power than your goal but very responsive.

I'm running the Spa T4 manifold in a bottom mount setup. I'm assuming that manifold would not work and I've heard that Borg Warners can be physically bigger (too big for bottom mount setups).

The GTX gen2 is a Honeywell answer to BorgWarners EFR. If the Gen2 is not a lot cheaper I'd go with the Borg as the Garrett still uses old turbine tech.

I was curious if a traditional ball bearing GT3582R would be an improvement. Also, I considered trying a different housing size .63 vs .81. If not, I was liking the specs on the GTX3576R (even gen 1).

[pbonsalb]

I don't know about the EFR8374 on a SPA. It was a tight fit on the original steedspeed open, at the fcab eyeball.

The GT3582R is a great turbo even today. I ran a 0.82 for years and liked it a lot. A 0.63 would be more responsive and should still make 500 rwhp. The newer turbos may be the better choice today. GTW6262, PT6262 if the new gtx is too expensive.

[FromSVTtoM3]

I don't know about the EFR8374 on a SPA. It was a tight fit on the original steedspeed open, at the fcab eyeball.

The GT3582R is a great turbo even today. I ran a 0.82 for years and liked it a lot. A 0.63 would be more responsive and should still make 500 rwhp. The newer turbos may be the better choice today. GTW6262, PT6262 if the new gtx is too expensive.

My only hesitation with a Precision is that I've heard they are less reliable than a Garret or BW. Since I will be doing track days with the car, I'm willing to sacrifice some power for reliability. Also, I heard the Garret/BW offerings tend to be more robust/durable than the Presicion/Comp counterparts and less finicky with smoking issues when bottom mounted. However, I don't know if that assumption is actually true or if it still applies to the newer turbos on the market. Basically, if I can get better response and have less bottom mount woes with a new turbo I would strongly consider biting the bullet on a different turbo.

[Butters Stoch]

Gtw6262 is a Garrett turbo. It was made to compete with the Precision line. It is robust, you get water cooling and much cheaper than the other models.

[pbonsalb]

For smoking issues, and I am not sure why your motor is smoking, a ball bearing turbo is easier to deal with since it uses less oil so there is less to drain. You are already using one and a -3 line so I am not sure why you have issues, but if you want to buy a new turbo, get the BB version if you think you will still need to minimize smoking.

[FromSVTtoM3]

Gtw6262 is a Garrett turbo. It was made to compete with the Precision line. It is robust, you get water cooling and much cheaper than the other models.

I just looked at that turbo. It may be a little big for my goals, but it sounds very promising based on the info on it. I see that it's physically larger than the smaller frame GT/GTX lineup. Would it be too large for a Spa bottom mount setup?

The 5857 may be more appropriate for my setup, but it doesn't appear to come in an undivided T4/v band like the 6262.

For smoking issues, and I am not sure why your motor is smoking, a ball bearing turbo is easier to deal with since it uses less oil so there is less to drain. You are already using one and a -3 line so I am not sure why you have issues, but if you want to buy a new turbo, get the BB version if you think you will still need to minimize smoking.

I'm thinking the smoking may be related to the scavenge pump location or lack of vent/check valves. After I exhaust those options I may change turbos if I'm still not happy with it.

[rajicase]

6262 is a small turbo, I definitely wouldn't suggest upgrading to anything smaller than that. 5857 would be tapped out around 450whp and leave you no room for growth. Personally I'd get a 6266 if I were you, quick spool and room for growth. Yes it should fit a spa no problem.

[mboor]

Fwiw, i run a 64mm comp ct4 on a spa T4. I had to put a 1" spacer between the manifold and turbo flange, and grind down the rib on the engine block, but it fits. No scavenge pump, it smoke a little under boost but not enough for me to put a pump in it.

[FromSVTtoM3]

6262 is a small turbo, I definitely wouldn't suggest upgrading to anything smaller than that. 5857 would be tapped out around 450whp and leave you no room for growth. Personally I'd get a 6266 if I were you, quick spool and room for growth. Yes it should fit a spa no problem.

Turbo Model Comp.
Wheel
Inducer
(mm) Comp.
Wheel
Exducer
(mm) Comp.
Wheel
Trim Turbine
Wheel
Inducer
(mm) Turbine
Wheel
Exducer
(mm) Turbine
Wheel
Trim Bearing
Type Flow
Capacity
GTW3476R (aka
GTW5857R) 58.3 76.4 58 65.0 56.6 76 BB 700 HP
GTW3684R (aka
GTW6262R) 62.3 84.4 54 71.0 61.9 76 BB 750 HP
GTW3884R (aka
GTW6265R) 62.3 84.4 54 74.2 64.6 76 BB 800 HP
GTW3884R (aka
GTW6465R) 64.3 84.4 58 74.2 64.6 76 BB 900 HP
GTW3884R (aka
GTW6765R) 67.3 84.4 64 74.2 64.6 76 BB 950 HP

I'm surprised because the info here rates a GTW3476R (5857) as a 700hp turbo. Even with 20% drivetrain loss that would put it at 560whp maxed out. I would have no intention of pushing it to that point.

[vr6dubny]

I can confirm the gtw3684 (6262) fits great on a spa manifold, though I am running a T3. I would imagine the 6266 would fit with no problem, seems to be plenty of room around mine. The pricing on the GTW's is excellent and i'm hoping for precision performance with garrett quality.

I feel you are looking for something different than a lot of the people on here. You are basing everything on auto-x/track use. For someone that doesn't want to push over the 500 mark I would think the gt35, gtw3684, or a 6262 would be more than enough.

Have you considered swapping to a different housing on your turbo maybe would move the torque curve?

[rajicase]

I'll suck my own dick the day that 5857 makes 560whp on an s52.

[e30kid89]

Fwiw, i run a 64mm comp ct4 on a spa T4. I had to put a 1" spacer between the manifold and turbo flange, and grind down the rib on the engine block, but it fits. No scavenge pump, it smoke a little under boost but not enough for me to put a pump in it.

Strange....I have a efr9180 on a spa t4 and it fits mint, no smoking on a gravity drain


Sent from my iPhone using Tapatalk

[wazzu70]

I'll suck my own dick the day that 5857 makes 560whp on an s52.

OK someone make 560whp on an S52 with a 5857. I know hes getting tired of greasy truckers.


On a different note, I was thinking today if Garrett has come out with any real new technology since the brand was owned by Allied Signal. Seems they have been using the same turbines and bearing housings since back then.

[FromSVTtoM3]

I'll suck my own dick the day that 5857 makes 560whp on an s52.

I may get this turbo just so you can make good on your promise. Pucker up buttercup!

[Mklock]

My 57 mm makes 500whp I bet I could 60 more with cams and meth prepare to "eat" them words lol.

[rajicase]

My 57 mm makes 500whp I bet I could 60 more with cams and meth prepare to "eat" them words lol.

That borg I think could do 560 but it'd be pushing it.

[Mklock]

I agree, it does have 61mm turbine wheel which is why it does so well anyways. If i get a dyno tune i think that would net me some more too. BW 4 lyfe.

[FromSVTtoM3]

So it appears as though the center section on my current turbo is failing so I'm going to get a new turbo. I decided on a GT3582R for price , reliability and ability to drop right in with my current setup. My debate is which housing size....a .63 or .82. My primary focus is 1)autox followed by 2)track days and then 3)drag strip/street. The power goal is 400-450whp and no more than 500. I assume the .63 housing will spool quicker (great for autox), but hopefully it doesn't choke in the upper power band. Anyone had experience with both housing sizes?

[Butters Stoch]

It will choke up top. The 35r spools hard so get the .82.
I could probably save u a few 100 if buying new. Let me know.

I personally would buy the gtw6262 tho. Which a Garrett gt3582r is basically a 6162 but outdated wheels. At least the GTW has updated compressor wheel. Your basically getting the gtx wheel on the GTW.