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Old 02-24-2010, 10:32 AM   #1
Element Tuning
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Join Date: Feb 2004
Location: 673 WHP Element ProComp Engine
Default Element Tuning GT65 Bolt On, Hydra, 452whp@22 psi, 07 STI 2.5 Pump Gas

This is really impressive for a bolt on turbocharger running pump gas and only at 22 psi. The plot didn’t turn out as smooth as I like but the AFR was within .1 and timing was smooth. I think we just had a little boost oscillation going on. I also find it difficult on the Dyno Dynamic dyno to load and unload just right resulting in a boost spike and then a little oscillation (too many buttons to press. LOL!).


Numbers
Dyno: Dyno Dynamics @ Pina Motorsports, WA
Tuner: Phil Grabow Element Tuning
Wheel HP: 452whp UNCORRECTED
Wheel TQ: 482wtq UNCORRECTED
Target Boost: 22 psi
Target AFR: 11.1
Fuel: 92 Octane pump gas Ambient Temp: 50
Elevation: 0



Initially we tuned the car at OEM fuel pressure but the DW 1000cc injectors were maxing out so we bumped the fuel pressure to 50 psi just to get the car tuned safely. The plan is to get some larger 1260cc injectors and the Hydramist system to turn things up.

Car Info
Year: 2007
Engine Management: Element Tuning Hydra EMS
Turbo: Element GT65 Bolt On
Intercooler: APS
Meth Kit: None
Injectors: 1000cc DW, Bosch 044 Fuel Pump
Engine: World One, Element Tuning Rods, CP Pistons, Cosworth cams, stock block and bore.
Intake/Inlet: Magnus, APS
Headers: ?
Uppipe: ?
Downpipe: ?
CBE: Invidia
Other:



I honestly couldn’t believe the power we hit with the Element GT65 Bolt-on especially given the car didn’t have anything done to the heads but a set of cams. I was tuning other cars this same day with rotated 35R kits and head work that were making the same power at this boost level. This car has had a rough past with bad tuning and engines but World One Performance sorted out the car so I could do my job. I was really happy for the customer this turned out so well.

With larger fuel injectors I think we could have turned up the boost a little (maybe 1-2 psi) for another 30 whp or so. With the Element Hydramist we should be able to add an additional 4 psi and get this car close to 500 whp on pump gas.

Check back as I’ll try to update with some photos!

Thanks,
Phil Grabow
Element Tuning
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Last edited by Element Tuning; 02-25-2010 at 05:34 PM.
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Old 02-24-2010, 10:47 AM   #2
stretchedk7
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thats pretty stout
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Old 02-24-2010, 10:49 AM   #3
Element Tuning
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Yeah I was impressed and that doesn't happen that often. LOL! 400 whp by about 4300 RPM with a bolt-on!

The more I look at the plot the more the torque dip looks like what I've seen when the BOV burst open at peak boost. I'm going to have to look into this before I tune the car again with additional mods.
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Old 02-24-2010, 10:54 AM   #4
CatfaceType-R
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vote stock location in 2014 great numbers, whatever setup
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Old 02-24-2010, 03:45 PM   #5
Element Tuning
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Yeah a GT65 Bolt On will have most people's HP goals covered.

Added pictures to the original post.
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Old 02-24-2010, 05:14 PM   #6
carterholt
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yyaaaaa! good work phil, cant wait for round two. haha
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Old 02-24-2010, 07:20 PM   #7
Phatron
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I would expect a much flatter tq curve at 22psi......what did it spike to at the beginning? 30 psi?

And is this car running speed density? Its not using that 70mm MAF right?

maxing out 1000cc injectors on pump gas at 22 psi? That doesnt sound right?

Dont most rotated gt35 cars run 1000cc injectors?

Mikey has done 28-29psi with his t60r on 850cc's and i did 32 psi tapering to 29psi on 740's yesterday with a dom4xtr....but i have meth.

Its just hard to imagine this similarly sized turbo is outflowing both of ours at 6-8 psi less.....

Last edited by Phatron; 02-24-2010 at 07:27 PM.
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Old 02-24-2010, 10:13 PM   #8
Element Tuning
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The more I look at the plot the more I realize that bov is blowing open which is a common problem with this brand.

DW 1000cc injectors don't actually flow 1000cc so this didn't surprise me. Another car I tuned was using them also ran out fuel at a similar level but was using a 35r. With water injection it made 500+ on pump so you really can't compare since it displaces fuel with water. Now if you're using Meth it burns so you're adding a 5th or 6th fuel injector depending on how many nozzles you have.

Injector duty cycle is independant of boost so it doesn't matter if you're making 450 whp at 22psi or at 28 psi it will take the same amount of fuel.

As for the power equalling what you got with less boost all I can say is that this whole package is better. This synopsis was used to publish a comparison test in one of the magazines and reads fairly.

This car works as I mentioned and surprised me making the same power as full rotated setups I tuned with more headwork on the same synopsis on the same day.
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Old 02-24-2010, 10:15 PM   #9
Element Tuning
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Oh he's using a Hydra ems so it's speed density tuning.
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Old 02-24-2010, 10:29 PM   #10
Phatron
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Quote:
Originally Posted by Element Tuning View Post
The more I look at the plot the more I realize that bov is blowing open which is a common problem with this brand.
.
i just went through that on the stocker. i was stuck at 26psi, replaced it with a forge and wham....32psi. amazing how much air can leak through....

ahh....i didnt notice the cams either.

pretty much disregard everything i said
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Old 02-24-2010, 11:03 PM   #11
Demon2003
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Quote:
Originally Posted by Element Tuning View Post
The more I look at the plot the more I realize that bov is blowing open which is a common problem with this brand.
Is that a Aps 50/50? What are you doing to fix the problem? spring? shims?
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Old 02-25-2010, 09:35 AM   #12
Element Tuning
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I'm going to recommend he changes the APS bov to a Turbosmart as it has a proven track record on our race car and project cars.
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Old 02-25-2010, 03:58 PM   #13
carterholt
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heres my actual mod list

Block:
CP pistons
Element tuning rods

Heads:
Brian crower valves and valve springs and retainers
Cosworth cams: 278 Intake / 274 Exhaust
(no porting)

Power Mods:
APS 725 fmic
APS 3 Inlet hose
APS 70mm intake
APS Fuel rails
APS B.O.V
Element tuning GT65 stock location turbo ( jet hot coated turbine housing )
Gruppe-s exhaust manifold ( jet hot coated )
unorothox racing, stock diameter pulley set
Magnus intake manifold, (longrunner) ( jet hot coated )
SBR up-pipe with 44mm tial ewg ( jet hot coated )
Invidia 3inch TBE
Bosch 300lph intank fuel pump
DW 1000cc injectors
greddy racing radiator and oil cooler
Hydra EMS


i had no idea about the bov.. haha

besides that im gonna put in the ultimate racing 1260'scc, amr exhaust manifold, and the hydramist..
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Old 02-25-2010, 05:36 PM   #14
Element Tuning
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Thanks. Those mods should work in nicely next time and let's upgrade that BOV. Let me know if you need me to source you one.

I still can't believe you drove that car non stop from Seattle to Colorado. LOL!
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Old 06-16-2010, 11:33 AM   #15
blackhawk07
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i know this is old as hell...but how much was this build and who do i contact? and how reliable is this build, i dont want another busted piston like i have now (waitin to have it repaired) lookin to do essentially the same thing to my 07 sti
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Old 06-16-2010, 01:45 PM   #16
project_skyline
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2011 STI

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Quote:
Originally Posted by Element Tuning View Post
I'm going to recommend he changes the APS bov to a Turbosmart as it has a proven track record on our race car and project cars.
I've had no problem with the APS holding 35 psi let alone 22 psi. It must not have a good vacuum line reference to it.

Great work regardless phil. Thats a good looking power band even with the rocky mountain look lol.
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