[chayashi]

Numbers
Dyno: DYNOmite eddy current
Tuner: Yi and Mike @ Racing Trenz
Wheel HP: 403.0
Wheel TQ: 380.6
Ambient Temp: ~64
Elevation: 5100+

Car Info
Year: 2006
Engine Management: Open source tune
Turbo: ATP GT3076R WG (T04S comp housing, .86 A/R turbine)
Intercooler: Blitz LM FMIC
Meth Kit: n/a
Injectors: DW 850cc
Intake/Inlet: HKS powerflow filter, draw thru MAF, 4-3" reducer at inlet.
Headers: HKS GT28 Rotated kit
Uppipe: HKS GT28 with T25 flange
Downpipe: HKS GT28 Bellmouth, divorced. 3"
CBE: GReddy Spectrum Elite
Other Power Mods: 18 psig, E85 fuel, Walbro 255, HKS limited SSQV BOV, fresh Denso IKH22's, fresh O2 sensor B1S1 (happened to fail a month ago), GIZZMO IBC boost controller (as easy to adjust as a MBC)

Link to your tuner's rating thread: Racing Trenz




My scanner is down so I pinned the dyno sheet to my garage wall and took photos

My friend Chris, bought a bugeye equipped with a built EJ257 block, with EJ20 heads. This turbo kit was already installed. We were told this was an HKS GT28 kit. T25 inlet flange, IWG with a divorced, bellmouth DP. He was retuned on this same dyno due to some serious driveability issues with the current ECUtek tune, and made 327WHP and 347 lbs ft at 21 psi on 91 octane.

He blew his transmission that had an RA gearset, and we rebuilt it with a PPG tall ratio 5spd gearset. The GT28 blew, and in June of '08, he bought a new ATP GT3076R WG with the T04S compressor cover and .86 hotside.
GT3076R-WG-TURBO: atpturbo.com

He broke the turbo in with zero boost for 500 miles, added DW850 topfeeds and was retuned. Made 340ish whp and ~360 lbs ft, on the same dyno at 16 psi on 91 octane. He was unhappy with the numbers, even though I tried to explain the difference in compressor efficiency, and the much taller 4th gear ratio.

He then had severe blowby issues and his wife was fed up. I offered my "classic", Yamaha FZR400 and stock turbo setup for his setup. His wife thought that was an outstanding idea and we swapped in Oct '08.
With my old VF39, DW850's and E85 he made 317 hp and 389 lbs ft on a dynojet at a different location. He was happy...

I purchased items to fab a TMIC location liquid to air setup, but with a 2 yr old and a newborn, I never had the time to finish. Vehicle was APv1 protuned prior to my purchase so I knew I had some leeway. Drove vehicle hotpiped directly from outlet to TB with a BOV until 3-09, when I installed the Blitz FMIC that was included in the trade.

The Blitz kit is 2" to mate to the WRX's TD04, and then expands to 2.25. Just before the i/c it becomes 2.75" thru the core and to the TB. But this kit had a 2-2.5" reducer and a custom elbow to connect to the rotated setup. From the moment I put it on, the turbo was ultra loud, even below boost threshold. I started to experiment by moving the reducer in and out on the turbo outlet and found that the sound would change. To me, that indicated a restriction. I removed this portion using 2.5" silicone 90's and a few couplers and then reduced to 2.25 to mate to the hotside i/c piping. I was correct in my assumption and there is very little induction sound until about 6psi which is a bummer (I love turbo noises) but it obviously is flowing better.
Prior to the FMIC install, I never hit more than 10 psi in +30 degree weather.

I had wanted to do the AWIC for pressure drop and lag reasons. I still may. I am stuck with $1000 worth of pump, resevior, heat exchanger and i/c.

E85 is $1.79 a gallon, race gas here in Denver. Our best pump gas is 91 octane junk. I use approx 30% more fuel ,but E85 is always 30+% cheaper, so money wise it's a wash.

I am very happy and cannot believe how hard this car pulls. I can't wait to take it to Bandimere and run the fastest ET and trap I've ever done. I cannot even imagine how much faster I'll be on the long straights of the Colorado State Patrol track. I am itching to get some laps on the new High Plains Raceway as well. Too bad I'll use 8 gallons of fuel just getting to and from there. Time for a few more fuel bottles.

My last project was a Galant VR-4 (#1513) that I purchased in 1998 and owned thru '04. My GVR-4 with a Big 16g, ran a mediocre 14.01 at 98 mph. That is quicker than a Z-28 up here, and it was fun, but a stock STi will run the same or better.

Chad Hayashi

[04E85sti]

he whats goin on chad, i was reading your post and was very interested as im gettin my 2004 sti tuned for E85 at MAC autosports on tuesday and cant wait!! right now im at 303awhp and 330tq, im gettin a perrin fuel rail, DW 850cc, and boost controller, right now im only pushin apprx 16psi im goin all the way up to 24psi which i hope she dont blow!! but im hopin to get to at least 330awhp and 390tq including with all my other mods AMR TMIC, Perrin EBCS, 255fuel pump, APS TBE and CAI etc... but love the post man, im up north in Greeley,CO

[chayashi]

If you haven't already purchased your injectors I would go a little bigger. At least 1100cc. You have top feeds right? 850's were the largest side feeds I could find. The reason being, so you don't have to upgrade again when you put a bigger turbo on. I'm at 92% IDC's.
...And you will want a bigger turbo.I don't believe the VF39 can do 24 psi here. It may flow it, but not efficiently.

The guy Chris I refered to in the above post was tuned there and was told he was "pretty much maxed out" at 21psi. Personally, I think he's already past "maxed". Our elevation kind of burns us IMO. Less manifold vacuum and more lag due to the decreased atmospheric pressure. Not to mention that a turbo then runs out of breath earlier. VF39's must be sick at sea level. My car made boost at 2100 rpm here.

I drove my Galant to San Francisco, for Christmas of '99, with the B16g. My manifold vacuum increased from 18 inHg to 24 inHg. Boost threshold dropped at least 500 rpm, down to below 2000 rpm.

I was running 17 psi here. When I got to the bay, I could not run more than 12 psi w/o getting an ignition misfire, which turned out to be a bad OEM plug wire I did not diagnose until after I returned, and was back at 18 psi.
It pulled harder at 12 than it did here at 18. I was pissed about living here for the next six months after I came home. I almost moved.

Also, I remember back in '01 or '02 it was a BIG deal when one of the DSM guys hit 12's at Bandmere on the TD04 14B on a 1G Talon. That car was lightened as well. Bushur can do it quicker all day long at his home track in a daily driver.

If for no other reason, the timing inceases that E85 allow are worth it alone. Wednesday, my turbo I could not build boost below 3500 rpm. My boost threshold is now 450-500 lower.

I'm not trying to act like I know it all. Just try to help, and save you some aggrevation if possible.

Best of all, yet another carbon footprint friendly, STi roaming Colorado...

Chad

[praha-sti]

Do you fill the whole tank up with E85 or mix it? Is there anything special one need sto use E85 or you can just dump it straight into the tank?

[chayashi]

I actually ran the tank as low as possible that morning. I started to run out of gas 5 miles from work, dumped in .3 gallons or so. (had a 2 gal gas can with me.)

I swapped in fresh Denso's and the 850's and filled the tank with 15 gallons of E85.( 3-5 gal cans filled the day before) Car fired right up and drove to get retuned.

With E85 you use approx 30% more fuel so you will need the capability to flow that much, and you need to tune for it.

I believe I make at least 30+hp more due to E85. Before the retune, my 1st gear was essentially useless. I had so much lag that it would not start to boost until 6000rpm. Now with the increases in timing, I have a useable 1st gear again and my boost threshold dropped to below 3000 rpm in 4th gear.

E85 has an octane equivalent of 105 and chemical cooling effects similar to meth injection.

I was going to buy a methanol kit and tune for our crappy 91, but decided to go E85. $500 buys alot of fuel and I don't need to find methanol.

[armyssoldierboy]

this is the closest to my projected setup except ill be using the ewg instead, tgv deletes and meth + 93oct instead of e85. nice numbers.

[chayashi]

Thank you. 93 + meth, you will have good numbers as well.

[armyssoldierboy]

because of the ewg ang tgv delete, i'm hoping for around 410/410ish. u running equal lengths or un equal lengths? i thought the atp 3076 would hit faster than your depicts? 300tq @ 4200rpms? shouldn't it be more like 3600ish?

**edit** im sure elevation is the playing factor as tx is damn near at sea level

[04E85sti]

hey chad sorry for late reply, yea i had already purchased my injectors by the time we talked, im not really going for monster power at the moment plus im trying to go sleeper style and i wanna just keep my AMR top mount and forget about the front mount that way no one will know if you gettin my drift, i might just upgrade to a 20g and throw on some un-equal headers so i keep the rumble that should put me over 380hp easy, i ended up puttin down 328awhp and 415lbs torque on 22psi, I LOVE E85 i was really happy with what Nick from MAC had got me, now i just have to find a way to post my dyno sheet as im not that smart with this yet. and yes livin up here in colorado does suck with the altitude situation, it sucks so much power.

[chayashi]

Originally Posted by armyssoldierboy

because of the ewg ang tgv delete, i'm hoping for around 410/410ish. u running equal lengths or un equal lengths? i thought the atp 3076 would hit faster than your depicts? 300tq @ 4200rpms? shouldn't it be more like 3600ish?

**edit** im sure elevation is the playing factor as tx is damn near at sea level

I'm sure elevation is the main factor. I have alot of lag. It's like an old school Porsche. Elevation kills all here. Stock C5 Vettes and STi's run about 14.0 secs here. The fastest, stock, 1st gen Viper pass I ever saw was 13.1.

I have HKS headers from a GT28 kit. Closer to equal length than OEM, but not equal. It's funny you should ask, I was actually thinking about measuring all the primaries to determine their true lengths. I do like the STi rumble, but I'm not one of those who think 4g63's and Hondas sound like crap so I actually think it sounds better.

As far as the torque, I'm sure I could gain some more and more hp, but this is an ultra conservative tune as far as the timing and I'm already at 92% IDC's. But, I can run the 18 psig, all year long with our 100 degree ambient temp swings with no worries or changes.

Yesterday, a friend of mine from work and I, tested his piped '07 GSXR 600 against my car. If I started in 3rd, he would sneak by due to the shift. On our only good run when I started in 4th at 4k, I pulled away. We filmed with a helmet mounted go-pro hero. Something happened and the camera shutoff and then back on during the 4th gear pull. I was kind of bummed. He is going to post the one file we got on youtube. I just checked and did not find it yet. I'll post into Vid's section when it's up.

I don't think I'm even to the most efficient part of the compressor's flow yet. If I can ever get a built shortblock, I am going to convert to 1200cc minimum topfeeds, with modded TGV's, and crank it up some. On the local forum, a built STi with a GT35 and E85 recently made 466whp at ~24 psi.