Hydra, Hydramist, 668 whp@30 psi, 05 STI 2.5, 35R

I just got really busy and finally had a chance to post the numbers for this beast of a track car.

Dyno: Dyno Dynamics @ Pina Motorsports, WA
Tuner: Phil Grabow Element Tuning
Wheel HP: 668whp UNCORRECTED
Wheel TQ: 576wtq UNCORRECTED
Target Boost: 30 psi
Target AFR: 11.5
Fuel: Q16/92 Octane pump gas mix
Ambient Temp: 50
Elevation: 0

Year: 2005
Engine Management: Element Tuning Hydra EMS
Turbo: HTA GT35R 1.06 Twin Scroll
Intercooler: APS
Meth Kit: Hydramist 80/20 water/methanol
Injectors: 1260cc, Bosch 044 Fuel Pump
Engine: World One, Element Tuning Rods, CP Pistons, BC +1mm valves, Cosworth cams, stock block and bore.
Intake/Inlet: World One
Headers: Titek
Uppipe: World One
Downpipe: World One
CBE: Greddy Evo2
Other: Element Tuning Competition Catch Can

What else is there to say but WOW! I had tuned this car once before but we ran out of fuel and the clutch was slipping. Fast forward to a new Element Clutch Masters, larger fuel injectors, higher fuel pressure, and what do you know the FP diaphram fails. We fix it and climb to 668 whp on 50% Q16 and pump gas along with the Element Hydramist.

The car had a little more in it but given the problems with the FP regulator resulting in extended tuning time the owner felt that just about 670 whp was even too much for a road race car.

More info and discussion can be found here:  http://forums.nasioc.com/forums/showthread.php?t=1931028

Phil Grabow
Element Tuning

524 whp on 93 pump, 629 whp on Q16

Event: Phil Grabow Hydra EMS Tune
Location: Element Tuning, Gaithersburg, Maryland
Ambient Temp: 68.92 degrees
Elevation: Sea level
Weather: Raining
Track and Conditions: NA
Tires: Michelin Pilot

I wasn’t really sure what to call this turbocharger as it’s based off of what we call the GT75 but this is a GT series housing with a Garrett 75 lbs compressor wheel and a Tial 1.03 exhaust housing. This was changed from the FP HTA since that was damaged (oil seals).

We made a little more power on pump 93 hitting 524 whp up from about 503 whp. It did spool a little slower than the HTA but had more top end. Very impressive for pump gas especially on this dyno!

On VP Q16 power was very good. There was some boost taper and overall we wanted more boost but that’s all the WG had in it. Upon further inspection we pulled the WG apart to upgrade the springs and noticed the diaphragm was folded over so this could have caused some issues. We’ll get stiffer springs in there and turn up the boost!

Target boost will be 35 psi which this turbocharger should have no issues running. Tuning went well and power came easily with boost. So far no sign of detonation issues as boost was increased or any other difficult symptoms. We did have misfire issues the last time the car was on the dyno but that was corrected with very tight spark plug gaps.

Car: 2007 Subaru STi
Tuner: Phil Grabow, Element Tuning
Dyno Info: Dynajet
Peak HP at RPM: 629.02@7600 rpm Uncorrected
Peak Torque at RPM: 405.94@6600 rpm Uncorrected
Baseline: 08 WRX 184 whp Uncorrected
Target Boost: 25-28 psi
Target AFR: 11.3
Fuel: 93, VP Q16
Engine: Cosworth Long Block
Intake: Cosworth
Turbo: Element Garrett/Tial 75 lbs T3 1.03
Header: GT Spec?
Exhaust: 3”?
Fuel System: 1600cc, A1000 Fuel Regulator and pump
EMS: Hydra 2.6 Engine Management
Modifications: Exedy Triple
Suspension Modifications: Tein Coilovers

Again this setup has been similar to the other large turbochargers I’ve tuned with the Cosworth cams and or head package. It just doesn’t like variable cam timing advance but really big turbochargers like this are all about the top end.

On the next runs I may push the RPM a little further if oil pressure looks ok. For now I’m limiting the engine to 8k rpm but clearly it will make power to about 9k rpm

Phil Grabow

More information and discussion can be found here on NASIOC:  http://forums.nasioc.com/forums/showthread.php?t=1884618

GT52 + Hydra 2.6 + Hydramist + Q16 = 475 whp / 534 wtq

Built by World One Performance, Phil traveled to the Pacific Northwest to tune this beast of an 07 STI.  Utilizing a number of Element Tuning products, including a GT52 turbo, Hydra EMS 2.6, and Hydramist, the car was tuned with Q16 race gas to a powerful 475 whp and 534 wtq.  This is a full 75 whp above what a GT52 typically makes on pump gas, which instantly put a smile on the customer’s face.  For more information on this build, please see World One Performance’s blog here:


Do you have a dyno sheet to show off your car using Element Tuning products?  Please contact us with a short write-up, photos, and/or link and we’ll add it to our site!