GT3076r with 380+ whp at STM's Mustang Dyno
Jul 28, 2009, 05:38 PM
#1
GT3076r with 380+ whp at STM's Mustang Dyno
So finally I can report some dyno plots of what the new Garrett GT3076R can do on my Evo X! After a couple weeks of tuning it on the street I finally got it strapped down to the local Mustang Dyno at Street Tuned Motorsports. This is one of the "Heartbreaker" series dynos and my car with stock turbo and full bolt-ons dynoed about 289 whp / 290 wtq in the spring which was almost identical to Buschur's more infamous "Heartbreaker" dyno in the mid west.
Emery was waiting for me right at 11 am and I explained that my timing advance was already at the limits for 27 psi and that likely I would be just adjusting AFR's and testing different MIVEC combos to see what works and what doesn't. Temps were already in the 80's with above average humidity and average barometric pressure so I knew the car was going to be down a few HP.
First run out and it hits 386 whp and 325 wtq in 4th gear! At this point I'm so excited that I overlooked one minor aspect of my tuning. What was 27 psi rock solid on the street was only 26.5 psi on the dyno, similar to how 3rd gear drops the boost levels about .5 psi across the board as well.
Despite the rookie mistake I ended up testing some theories and found out that lowering Intake Mivec to 10 Degrees advance 1000 RPM's earlier in the powerband hurt power. I reset back to my Hiboost Mivec maps and tried retarding the Exhaust Mivec -5 at 6000 and -10 from 6500-8000 and had strong gains across that powerband. Next I tried -5 at 5500, -10 at 6000 and -15 from 6500-8000 and it lost power again so it appears that the -10 exhaust retard on the top end works for this size turbo.
Last run I decided to test about 1 psi less boost which is 26 psi on the street but that ended up being 25.5 psi on the dyno. Still it was a very strong pull for the boost levels and was only down about 10 whp peak and 20 wtq. Likely I'll run 25 or 26 psi for road courses and use the 27 psi setting for drag racing and street encounters.
Overall due to very little if any data being available on tuning this setup I've basically done it all from the ground up. I installed it myself, worked through the problems, tuned it all on my own after countless hours of research, finally I have some solid results under my belt. Despite the lower than expected torque hit, the car pulls very smoothly and evenly right to 8000 RPM and the higher you rev it the more horsepower it delivers despite the boost taper. Next time I'll remember to adjust the boost for the dyno and make sure that the top run is revved out to the same RPM as the lower boost run.
I want to thank Emery at STM for moving such a beautifull AWD mustang dyno setup to less than 10 minutes from my house. I'm sure I'll be back with Intake Manifold, Cosworth Cams, and race gas tunes to test in the future!
Mod list:
- Garrett GT3076R
- ETS Tubular Exhaust Manifold - DW 800 CC Inj - Walbro FP
- ETS 4" FMIC - ETS 2.5" IC Pipes - AMS Intake
- ETS 3" Dual CB - UR 3" Mini-Muffler TP & O2 DP
- Dejon Dual MBC (25 & 27 PSI) - Forge WGA - Works BOV
- ACT-ME1-HDG6 Clutch - ACT Streetlite Flywheel
Tuning Info:
13.0 -> 12.0 AFR during spoolup, ~11.5 AFR at full boost (93 octane)
8-17 degrees of timing advance @ 27 psi tapering to 24 psi (93 octane)
20 psi by 3600 in 4th, 27 psi by 4000 in 4th
Hiboost Mivec maps with -10 exhaust retard at 6500+ rpm's
Tuned by me using EcuFlash v1.42 and EvoScan v2.6b17
Summary (Dyno reads at least 10% lower than a DynoJet, stock Evo X's baseline ~210-220 whp):
289 whp / 290 wtq with Stock Turbo @ 25 psi tapering to 19 psi @ 7500
374 whp / 307 wtq with GT3076R Turbo @ 25.5 psi tapering to 24.5 psi @ 6900 and 23.5 psi @ 7400
380 whp / 323 wtq with GT3076R Turbo @ 26.5 psi tapering to 25.5 psi @ 6900 and 24.5 psi @ 7400
386 whp on this Mustang Dyno is about 420 whp on a DynoJet and an estimated 504 Crank HP. Should be good for mid 11's and 120 mph trap speeds with the right driver and ability to rev 4th gear. My future upgrades consisting of Cosworth cams, Intake manifold, and race gas at 30+ psi could potentially get me close to 600 crank HP, stay tuned!
Emery was waiting for me right at 11 am and I explained that my timing advance was already at the limits for 27 psi and that likely I would be just adjusting AFR's and testing different MIVEC combos to see what works and what doesn't. Temps were already in the 80's with above average humidity and average barometric pressure so I knew the car was going to be down a few HP.
First run out and it hits 386 whp and 325 wtq in 4th gear! At this point I'm so excited that I overlooked one minor aspect of my tuning. What was 27 psi rock solid on the street was only 26.5 psi on the dyno, similar to how 3rd gear drops the boost levels about .5 psi across the board as well.
Despite the rookie mistake I ended up testing some theories and found out that lowering Intake Mivec to 10 Degrees advance 1000 RPM's earlier in the powerband hurt power. I reset back to my Hiboost Mivec maps and tried retarding the Exhaust Mivec -5 at 6000 and -10 from 6500-8000 and had strong gains across that powerband. Next I tried -5 at 5500, -10 at 6000 and -15 from 6500-8000 and it lost power again so it appears that the -10 exhaust retard on the top end works for this size turbo.
Last run I decided to test about 1 psi less boost which is 26 psi on the street but that ended up being 25.5 psi on the dyno. Still it was a very strong pull for the boost levels and was only down about 10 whp peak and 20 wtq. Likely I'll run 25 or 26 psi for road courses and use the 27 psi setting for drag racing and street encounters.
Overall due to very little if any data being available on tuning this setup I've basically done it all from the ground up. I installed it myself, worked through the problems, tuned it all on my own after countless hours of research, finally I have some solid results under my belt. Despite the lower than expected torque hit, the car pulls very smoothly and evenly right to 8000 RPM and the higher you rev it the more horsepower it delivers despite the boost taper. Next time I'll remember to adjust the boost for the dyno and make sure that the top run is revved out to the same RPM as the lower boost run.
I want to thank Emery at STM for moving such a beautifull AWD mustang dyno setup to less than 10 minutes from my house. I'm sure I'll be back with Intake Manifold, Cosworth Cams, and race gas tunes to test in the future!
Mod list:
- Garrett GT3076R
- ETS Tubular Exhaust Manifold - DW 800 CC Inj - Walbro FP
- ETS 4" FMIC - ETS 2.5" IC Pipes - AMS Intake
- ETS 3" Dual CB - UR 3" Mini-Muffler TP & O2 DP
- Dejon Dual MBC (25 & 27 PSI) - Forge WGA - Works BOV
- ACT-ME1-HDG6 Clutch - ACT Streetlite Flywheel
Tuning Info:
13.0 -> 12.0 AFR during spoolup, ~11.5 AFR at full boost (93 octane)
8-17 degrees of timing advance @ 27 psi tapering to 24 psi (93 octane)
20 psi by 3600 in 4th, 27 psi by 4000 in 4th
Hiboost Mivec maps with -10 exhaust retard at 6500+ rpm's
Tuned by me using EcuFlash v1.42 and EvoScan v2.6b17
Summary (Dyno reads at least 10% lower than a DynoJet, stock Evo X's baseline ~210-220 whp):
289 whp / 290 wtq with Stock Turbo @ 25 psi tapering to 19 psi @ 7500
374 whp / 307 wtq with GT3076R Turbo @ 25.5 psi tapering to 24.5 psi @ 6900 and 23.5 psi @ 7400
380 whp / 323 wtq with GT3076R Turbo @ 26.5 psi tapering to 25.5 psi @ 6900 and 24.5 psi @ 7400
386 whp on this Mustang Dyno is about 420 whp on a DynoJet and an estimated 504 Crank HP. Should be good for mid 11's and 120 mph trap speeds with the right driver and ability to rev 4th gear. My future upgrades consisting of Cosworth cams, Intake manifold, and race gas at 30+ psi could potentially get me close to 600 crank HP, stay tuned!
Last edited by Hiboost; Mar 9, 2010 at 09:39 PM.
Jul 28, 2009, 06:28 PM
#4
Thanks guys, It hasn't been an easy path to take but it definitely has some nice potential as I add mods down the road.
Here is what I used for tuning:
EcuFlash 1.42 (for editing the ecu maps)
EvoScan 2.6 b17 (great datalogger once you setup mode23)
Virtual Dyno Room 5.5 (to get a rough idea if changes are positive)
Here is what I used for tuning:
EcuFlash 1.42 (for editing the ecu maps)
EvoScan 2.6 b17 (great datalogger once you setup mode23)
Virtual Dyno Room 5.5 (to get a rough idea if changes are positive)
Jul 28, 2009, 06:38 PM
#5
Glad to finally see some results that are positive. You definitely have a lot of your time into this so its nice to see the strong numbers. Looks like its still making power up to where you ended the pull. With some cams, that should really open things up for you.
Wonder what a 3071 makes in terms of torque compared to the 3076. I would give up some power up top for more torque, or atleast a flatter torque curve.
Good Job
Wonder what a 3071 makes in terms of torque compared to the 3076. I would give up some power up top for more torque, or atleast a flatter torque curve.
Good Job
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Jul 28, 2009, 07:01 PM
#8
It all depends on how low a typical stock Evo X baselines, the Mustang Dynos are very repeatable on the same dyno but can vary depending on their individual calibration. I think Buschur's Mustang Dyno baselines 210-220 whp while STM's might be even slightly below that.
Emery overlayed a GT35R that dynoed 427 whp at a conservative 24 psi on 93 octane and they had almost identical peak torque as mine about 500 RPM's later (5000 vs 4500). Of course the graph climbed steeper to reach higher numbers but with Cosworth cams I bet I would give him a run for his money and have a wider power band with my torque peak hitting as early as 4000 rpm
Of course if he upped his boost he has quite a bit more potential left but I'm really happy how the car turned out now. The car has a little less spool and torque hit compared to the FP Red and Dom 2 but doesn't seem to level out as much on the top end in exchange. Time will tell what additional mods bring but it looks promising.
I'm betting the torque is much more similar to the FP Red and Dom 2 turbos, transient response should be really good with the bb center cartridge as well and you could still get within ~50 crank HP of my setup using the right mods.
I think part of my lower torque is that the larger .94 AR housing is more for top end flow and the boost spike is almost non existant according to my logging. I may test out some different mivec and timing settings down low to see if I can boost that number but right now the car just pulls very evenly to 8000 rpm like a scaled down 35R would.
Emery overlayed a GT35R that dynoed 427 whp at a conservative 24 psi on 93 octane and they had almost identical peak torque as mine about 500 RPM's later (5000 vs 4500). Of course the graph climbed steeper to reach higher numbers but with Cosworth cams I bet I would give him a run for his money and have a wider power band with my torque peak hitting as early as 4000 rpm
Of course if he upped his boost he has quite a bit more potential left but I'm really happy how the car turned out now. The car has a little less spool and torque hit compared to the FP Red and Dom 2 but doesn't seem to level out as much on the top end in exchange. Time will tell what additional mods bring but it looks promising.
Glad to finally see some results that are positive. You definitely have a lot of your time into this so its nice to see the strong numbers. Looks like its still making power up to where you ended the pull. With some cams, that should really open things up for you.
Wonder what a 3071 makes in terms of torque compared to the 3076. I would give up some power up top for more torque, or atleast a flatter torque curve.
Good Job
Wonder what a 3071 makes in terms of torque compared to the 3076. I would give up some power up top for more torque, or atleast a flatter torque curve.
Good Job
I think part of my lower torque is that the larger .94 AR housing is more for top end flow and the boost spike is almost non existant according to my logging. I may test out some different mivec and timing settings down low to see if I can boost that number but right now the car just pulls very evenly to 8000 rpm like a scaled down 35R would.
Last edited by Hiboost; Jul 28, 2009 at 07:04 PM.
Jul 28, 2009, 08:10 PM
#9
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Hiboost,
I normally don’t make these types of posts but ever since I met you at last years Shootout (I had the White X if you recall) I have followed your build. You deserve a big thumbs up so here you go……
Your perseverance and patients with this build has been very impressive and something we all could learn something from. I am sure it’s very gratifying that all the hard work is paying off!
Thanks for all your contribution to the community.
Hope to see you at the Shootout.
~Ryan
I normally don’t make these types of posts but ever since I met you at last years Shootout (I had the White X if you recall) I have followed your build. You deserve a big thumbs up so here you go……
Your perseverance and patients with this build has been very impressive and something we all could learn something from. I am sure it’s very gratifying that all the hard work is paying off!
Thanks for all your contribution to the community.
Hope to see you at the Shootout.
~Ryan
Jul 28, 2009, 08:34 PM
#10
Hey Ryan, good to hear from you again!
I'll definitely be there with the STM crew again this year and hopefully will run some competitive numbers. I would imagine there will be quite a bit more competition in the Evo X Stock Appearing class but I'm still going to give it my best shot.
I'm thinking I should contact Garrett about sending me some Cosworth cams to test out since I've posted more positive info than any vendor so far on their GT30 turbo!
Thanks for the thumbs up, I figure the more info I provide, the more I will get in return and we all win that way.
I'll definitely be there with the STM crew again this year and hopefully will run some competitive numbers. I would imagine there will be quite a bit more competition in the Evo X Stock Appearing class but I'm still going to give it my best shot.
I'm thinking I should contact Garrett about sending me some Cosworth cams to test out since I've posted more positive info than any vendor so far on their GT30 turbo!
Thanks for the thumbs up, I figure the more info I provide, the more I will get in return and we all win that way.
