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Thread: gt4094r

  1. #1
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    turbo e36 m3/ stock s50/e30 m3

    gt4094r

    Finally got it back on the road again. My previous set-up was a gt35r turbo. All I can say, love the sound of the gt4094r. Combined with the louvers and an electric cutout, hearing the turbo never gets old. This new set-up is a top mount divided dual wastegate manifold made by Otis with a 3.5" downpipe. I really can't tell the difference in spool between both turbos. But this turbo does hit hard and definitely has more power at the same psi as my previous turbo. I'm currently on 14psi waiting to install my W/M injection system. I'll do some road tuning before I fine tune it on a dyno. I want to see how much I can squeeze out it with 91 octane, then with 91 octane and w/m injection, and finally with VP fuel.
    IMG_1711.jpg
    IMG_1712.jpg
    IMG_1713.jpg
    IMG_1714.jpg


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  2. #2
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    Looks very clean!

    Details on those hood vents please? I'm putting together a top mount kit that I plan to track so I'd like to reduce underhood temps.

  3. #3
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    Quote Originally Posted by illmatik View Post
    Looks very clean!

    Details on those hood vents please? I'm putting together a top mount kit that I plan to track so I'd like to reduce underhood temps.
    http://trackspecmotorsports.com/shop...-m3-92-99.html


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  4. #4
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    1999 BMW M3 Coupe
    Looking real clean. Report back with numbers! I also have a w/m system going into my car so I'd liked to know the difference people are seeing on the dyno with and without meth.


    PTE6262 .63 A/R, Stock S52, Cutring/Copper Spacer/Arp Studs Combo, Water Methanol Injected
    10.9@131mph. #AngerMotorsports

  5. #5
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    The GT40/94r is a GREAT combo for any 3.0L-3.5L. If set-up on the right manifold the spool is great and the power is killer. Also it has bullet proof reliability from the Garrett.

    The other bonus is these turbo's are now being looked over for all the new GTX stuff or EFR or Precision. Let's face it though......this turbo will run for days, makes a great whistle sound the new ones don't make, and will put out 850 whp ALL IN. I see this turbo as the end all for a budget build street turbo for anyone looking to make 600 wheel on pump and 850 wheel on ethanol of race gas.
    Attention TURBO LOVERS, Great book -----> How to turbocharge and Tune your Engine

    Favorite Automotive Tuning Articles on the Internet: Engine Tuning Articles
    My Car: Custom Build Lotus Super 7

  6. #6
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    Quote Originally Posted by flexer View Post
    The GT40/94r is a GREAT combo for any 3.0L-3.5L. If set-up on the right manifold the spool is great and the power is killer. Also it has bullet proof reliability from the Garrett. The other bonus is these turbo's are now being looked over for all the new GTX stuff or EFR or Precision. Let's face it though......this turbo will run for days, makes a great whistle sound the new ones don't make, and will put out 850 whp ALL IN. I see this turbo as the end all for a budget build street turbo for anyone looking to make 600 wheel on pump and 850 wheel on ethanol of race gas.
    How do you feel the 67mm GTW 3884r stacks up against the 4094r?

  7. #7
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    Quote Originally Posted by e30kid89 View Post
    How do you feel the 67mm GTW 3884r stacks up against the 4094r?
    Does it make GT4094R sounds?

  8. #8
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    Quote Originally Posted by NOTORIOUS VR View Post
    Does it make GT4094R sounds?
    No sadly

  9. #9
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    looks beautiful sir!

  10. #10
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    Quote Originally Posted by NOTORIOUS VR View Post

    Does it make GT4094R sounds?
    I have yet to hear any turbo make 4094 sounds. They seem to have a ringing bell whistle.
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
    1/4 mile 10.84 @ 136.72
    Your 1 and only stop for all your BMW performance needs
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  11. #11
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    Even when taking off in first gear without much effort, it can be heard. I'm very pleased with this turbo. I should have just skipped the gt35r and gone with the gt4094r. Can't wait bump the boost into the 20's.


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  12. #12
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    98 Turbo M3, 04 E53 X5
    Where did you mount the cutout? any pics?

    98 Fern Green M3/2 - Precision 6870/AR Designs Twin Scroll/RK/E85
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  13. #13
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    IMG_0957.jpg FullSizeRender (2).jpg Here are the two logs comparing response between the gt35r and the gt4094r. Notice the cursor is slightly more to the right on the gt40 run. As you can see, there's not much difference in response between both turbo. I did find a boost leak for the gt40 run but none the less, look at the difference. This is on a 3.23 gearing in third gear.
    Last edited by m3boost; 01-19-2017 at 05:02 PM.


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  14. #14
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    You guys have got me thinking about ditching the GT35R I have for my first build in lieu of the GT4094R

  15. #15
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    A GT4094 won't spool anywhere near a GT3582R, but it will make 800 rwhp and a GT3582R wont. The bigger turbo will likely be about 400 rpm behind the medium turbo, which could be 50+ lbs rwtq or rwhp at a given rpm. You will see this most in the 2500-4500 rpm range. From about 4500 to about 5500, the two will be comparable. From 5500 to 7000, the big turbo will make more power and torque.

    If your goal is a highway pull car, and you don't mind downshifting to get the rpm up, the big turbo is the one. Same goes if you are just a street racer, since your racing will pretty much always have you above 4000 rpm, even after a shift. But for daily driving, a responsive turbo is a lot of fun and you will spend a lot more time enjoying the boost because it is more accessible.

  16. #16
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    Quote Originally Posted by pbonsalb View Post
    A GT4094 won't spool anywhere near a GT3582R, but it will make 800 rwhp and a GT3582R wont. The bigger turbo will likely be about 400 rpm behind the medium turbo, which could be 50+ lbs rwtq or rwhp at a given rpm. You will see this most in the 2500-4500 rpm range. From about 4500 to about 5500, the two will be comparable. From 5500 to 7000, the big turbo will make more power and torque. If your goal is a highway pull car, and you don't mind downshifting to get the rpm up, the big turbo is the one. Same goes if you are just a street racer, since your racing will pretty much always have you above 4000 rpm, even after a shift. But for daily driving, a responsive turbo is a lot of fun and you will spend a lot more time enjoying the boost because it is more accessible.
    you have to remember that it's also a twin scroll with a divided manifold. Makes a bigger turbo have the response of a smaller turbo but with alot more top end. As far as daily driving, I can't tell the difference between both when it comes to response.


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  17. #17
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    Quote Originally Posted by m3boost View Post
    you have to remember that it's also a twin scroll with a divided manifold. Makes a bigger turbo have the response of a smaller turbo but with alot more top end. As far as daily driving, I can't tell the difference between both when it comes to response.
    This was my thoughts when I got a ride in a 4094r twin scroll 3.0L car.

    Dyno graphs only tell part of the story of how the car drives/responds in real life.

  18. #18
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    The EFR 9180 is pretty close in size to the GT4094R. I have my fingers crossed that it's about the same spool and transient response as the GTX35R but with mo powa.
    '97 M3, Estoril blue, 2 dr, euro 6-spd, EFR 9180 divided T4 .92 IWG, RK tuning, CP 8.5:1 pistons, Eagle rods, Schrick cams, L19 11 mm ARP studs, O-ringed block, Supertech stainless/inconel valves, Supertech springs & Ti retainers, ported head, S54 oil pump/pan, 80 lb. injectors, OBD1 intake manifold, Steedspeed twin scroll T4, 3.5" SS exhaust, eBoost2 EBC, HFS-4 W/M injection, AEM Failsafe, Zeitronix data logger, Racelogic TC, OpenOBC w. ethanol %, Ireland Eng. engine mounts, UUC black tranny mounts w. enforcers, UUC twin disc feramic, ARC-8's, MCS 2-ways, Z3 rack, Rallyroad strut bar, X brace, Eibach sway bars, Ground Control LCAB bushings, Bimmerworld RTAB's, Powerflex subframe bushings, 210 4-clutch LSD, Stoptech BBK, titainium shims, steel braided lines, brake cooling ducts.

  19. #19
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    Maybe open 35r vs TS 4094. But, I agree with Phil, apples to apples 35r will crush the 4094 in spool up.
    On the other hand, a 35r with a big back housing on pump gas and a open manifold will probably be beaten in spool by a 4094 twin scroll on race gas.

    No magic, twin scroll will move both graphs to the left.
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
    1/4 mile 10.84 @ 136.72
    Your 1 and only stop for all your BMW performance needs
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  20. #20
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    Quote Originally Posted by Butters Stoch View Post
    Maybe open 35r vs TS 4094. But, I agree with Phil, apples to apples 35r will crush the 4094 in spool up. On the other hand, a 35r with a big back housing on pump gas and a open manifold will probably be beaten in spool by a 4094 twin scroll on race gas. No magic, twin scroll will move both graphs to the left.
    My gt35r was t3 open with a .82 a/r. The gt4094r is t4 with a 1.06 a/r....also, with the gt35r I used a ported AA turbo manifold
    Last edited by m3boost; 01-19-2017 at 08:36 PM.


    96 M3, GT4094R, Arrow Rods, CP Pistons, Elring HG, cutring 87mm, 10 mm ARP studs,MS3pro, EMC Intercooler, n54 6 speed with Motiv twin disk, ZT-2 wideband, Zionsville Radiator, X-brace, H&R springs with bilstien shocks, QTP electronic cutout, Line Locks, stock exhaust 455rwtq, 453rwhp at 14 psi 91 octane.......684rwtq, 681rwhp at 24 psi running flex fuel E60 at time of dyno tune.

  21. #21
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    I went from a 0.82 T4 GT3582R to a 0.95 GTX4088R, both on open Boostlogic. Lost about 500 rpm in spool but gained a lot of top end power. For my driving style, I did not like it as much. Run a twinscroll manifold and/or E85 and the big turbo response will improve. I am copying chikinhed now, with the twinscroll manifold and EFR9180 -- should be a responsive big turbo combination.

  22. #22
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    Another thing to take into consideration is, at 13 psi both of those turbos are just starting to spool up. The 35r will be a rocketship from 13 to 20 where the 4094 will be more linear.
    So, hitting 13 psi at 4k is good, hopefully 20 won't take much more time.

    Either way, looking at your logs, that does seem to be an awesome setup. Logs look great. Now just slowly creep that boost up.

    This is just another perfect example how important running a TS Manny is. I can't wait to get mine in. I may want a bigger turbo.
    Gt4202 or 6870 + steed speed would be killer.
    I've been eyeing that new gtx3584, but I don't think it would really do much up top for me. Spool maybe, but being limited to 93+meth sucks.
    Last edited by Butters Stoch; 01-19-2017 at 09:19 PM.
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
    1/4 mile 10.84 @ 136.72
    Your 1 and only stop for all your BMW performance needs
    WWW.CESMOTORSPORT.COM

  23. #23
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    I can't wait to hear the noise the 40/94 makes with no muffler, open dump on 25+ psi with the twin scroll Steed !
    Last edited by Mod Addict; 01-19-2017 at 11:11 PM.
    1997 Cosmos E36 M3/4/5 Boost Logic GT40/94r .85 Technique Tuning
    Stock motor

    1998 Estoril E36 M3/4/c4 Steed Speed2 Gt40/94r 1.06 Technique Tuning,
    Built motor, Best ET ( 9.63 @ 142.61 mph MS100+meth ) 10/08/21
    Best mph ( 10.08 @ 144.66mph MS100+meth ) 9/18/19
    build thread:
    http://www.bimmerforums.com/forum/showthread.php?2269817-Habbit-continued-Turbo-build-V



  24. #24
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    gt4094r

    Quote Originally Posted by Mod Addict View Post
    I can't wait to hear the noise the 40/94 makes with no muffler, open dump on 25+ psi with the twin scroll Steed !
    can't wait to hear it

    On the other hand, perfect example of the blue beast and 4094 would be like this

    https://youtu.be/rjR8niNrByU

  25. #25
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    Quote Originally Posted by Mzfhartge View Post
    can't wait to hear it

    On the other hand, perfect example of the blue beast and 4094 would be like this

    https://youtu.be/rjR8niNrByU
    Edited: i want those bars don't sell them

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