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Old 09-17-2016, 05:40 PM   #1
No Go
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Join Date: Jun 2003
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2004 153 MPH STI
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Default Dyno Tune: 2.5L + Blouch Dominator 1.5 XTR Makes 412 WHP and 7800 RPM

Event: Chassis Dyno
Location: PRS, Sanford, FL
Ambient Temp: 90 degrees F
Elevation: 35 feet
Weather: Sunny and 80% humidity
Tires: BFG Rival (245/40-17)

Car: 2004 STI
Tuner: Mike Adkins (MTunned)
Dyno Info: Mustang AWD (Unknown Model)
Transmission: OEM 6 speed
Gear: 3rd gear
Peak HP at RPM: 412 @ 6700
Peak Torque at RPM: 367 @ 4500
Baseline hp/tq for a stock on same dyno: Unknown
Target Boost: 20
Target AFR: 11.2
Fuel: 93 Octane
Engine/Power Modifications: Fresh engine with OEM crank, Manley 625 bolt H Beam rods, Cosworth Pistons, Cosworth Cylinder Heads (OEM cams), Blouch 1.5 XTR turbo (3 inch/10 cm), Perrin 3 inch inlet, 73 MM KSTech Intake, Process West Top Mount Intercooler, 850cc ID injectors (top feed conversion), IAG TGV Deletes, Cobb catted turbo back (3 inch connector), Cobb Up-Pipe,
Driveline Modifications: Carbon fiber driveshaft, 800 HP DSS Axles
Suspension Modifications: NA
Other Modifications: NA

This car made 262 WHP with Stage II setup (OEM turbo) on a very similar dyno (within 1%).

Prior dyno visit with 313 WHP run with original motor / same dyno:

http://forums.nasioc.com/forums/show....php?t=2730281

Turbo was out of breath and could only sustain 20 PSI boost. I elected to turn it to 7800 RPM to see the curve...obviously dropping.

Video of the fun:

https://www.youtube.com/watch?v=re1h8VCWQTA

Attachments: Dyno chart



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Old 09-17-2016, 11:08 PM   #2
02nismokiller
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Something doesn't seem right. How are you making 412whp at 20psi and the turbo is maxing out? I think you misunderstood the tuner or the tuner didn't explain something right to you. You're not running that turbo out of breath at 20psi and that's why the power is falling off. Your issue is the injectors, you have small injectors in the car! You need id1300's to really make things shine on e85.
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Old 09-17-2016, 11:09 PM   #3
02nismokiller
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And tell the tuner to tune the car in 4th gear instead, your tranny has really short gears and 3rd runs out too fast
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Old 09-18-2016, 02:29 AM   #4
Joshwrx04
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Default Dyno Tune: 2.5L + Blouch Dominator 1.5 XTR Makes 412 WHP and 7800 RPM

Mike Adkins is a decent tuner from what I've read.
But yes there's no way that 1.5 is running out of breath with 20 psi.
My last setup was a 1.5 on e85 with id1300's. @22-23 psi and wasn't out of breath yet.
I also made 412whp on a mustang dyno but that was on e85
Pretty impressive numbers you have there on 93
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Old 09-18-2016, 08:45 AM   #5
No Go
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Every dyno visit has been 3rd gear...it was his preference so stuck with it. I had a 4th gear run done at one point (in the past) and the numbers were nearly identical, dyno ops don't like it as much as the roller spin down is longer and wears their dyno out more (at least that was one owners response.)

20 PSI: I was surprised at the 20 psi sustained limit of the turbo...on a past visit he suggested 25 psi should be attainable with a fresh prepped engine. I requested it, but it was not to be on the dyno.

There maybe more going on with the boost number...ie ported heads are a reduced restriction which means boost will be lower for a given setting. I wonder if the turbo's limit will be relatively lower as well. Nonetheless, the engine made 20-30 more WHP than I expected based on limited knowledge of other combinations.

I will say the following day in cooler morning weather, Cobb AP reads 25.5 psi in a 6th gear roll on...hmm. I will have to follow up with him to determine if this is ok or not. Daytona is a heavy 6th gear track! I'd rather not toss the rods at 140 MPH!

https://www.youtube.com/watch?v=Z1ZGj9PwHzo

Additionally, it was quite hot and humid, not ideal (although numbers are standardized).

Fuel injectors: I have 1000 CC ID's in hand and due to some miscommunication, I didn't get an appropriate map to drive it to the dyno (2 hours!). I was not going to risk ring damage (it is pulling 10% currently on 850 for cruise) driving on an 850 map. Nonetheless, he was specific that they were not needed at this level of HP.

He mentioned the drop off is also due to stock cams...I chose to stick with OEMs at this point. Some concern over the aftermarket quality had me spooked and besides this was a pretty big project for myself...quite content to make it back home after the event!

I'm not all knowing on Subaru's...I consider Mike A the most reputable tuner in central Florida...why the 4 hour round trip (and to use the same dyno) each time.

Thanks for the comments.

Last edited by No Go; 10-06-2016 at 07:17 PM.
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Old 09-18-2016, 10:35 AM   #6
Rizen
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850s are probably fine on pump. I went with 1700s for tuning on E85 lol. Same price as 1300s and I have a fully built motor + heads on a Dom 2.5.

Those are excellent numbers, how does she feel? You're the guy who took their 04 out @ Daytona right? I remember that thread.
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Old 09-18-2016, 04:13 PM   #7
No Go
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Yes...I did take it to Daytona among others. Will again in two weeks.



In hindsight, I should have gone with 1000 cc when I bought my 850's (same price as well), but my knowledge/background suggested to stay with the smallest injector for a good idle (guess now days that is not necessarily the case).

Josh: that is a great data point if you made same power, but on E85. Possibly the difference were the heads. I'd looked at getting a barrel of E85 as access here is not good when you consider I use this car 330 miles a week.
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Old 10-06-2016, 05:15 PM   #8
No Go
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Here is the engine in action...

LINK

Unfortunately, the intercooler coupling kept popping off and bleeding 10 psi of boost...so really the car was back to 390 CHP.

Responsibly, I should have called it a day, but no knock, AFR looked ok...so continued to cane it!

I never got over 7000 rpm as it would not pull up there due to the issues.

The top mount (in the nearly 90 degree heat) was working hard...hitting 180 degrees on the long straight (WOT for a considerable distance).

It consumed .75 of Mobil 1 0W-40 oil...it was expected.

Got just over 6 mpg too!

Motor now has nearly 3000 miles on it-cool.

Car is a riot!
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Old 10-06-2016, 06:08 PM   #9
04fpgreensti
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Why are you running mobil 1?????

If your tuner did not suggest running a better oil then I would personally question that. That oil is terrible for these engines
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Old 10-06-2016, 06:39 PM   #10
point78
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Quote:
Originally Posted by 04fpgreensti View Post
Why are you running mobil 1?????

If your tuner did not suggest running a better oil then I would personally question that. That oil is terrible for these engines
My motor seems to like the mobil 1 he's using.

I was gonna go to Walmart & pick up a new jug this week.

(I would probably choose a different oil if I was on a track though.)
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Old 10-06-2016, 07:02 PM   #11
No Go
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04fpgreensti: The only comment on this post is the oil type?

Please don't derail the thread-M1 has suited me fine on the previous 190,000 mile original motor too. Next will be the fact you should never do high gear pulls on Subarus...

Break Break...

Quite happy my skills and much thanks to this forum assisting my attempt on assembling a foreign motor.

I wish I had the full HP available...guess I will have to make another go of it next time Daytona becomes available-about 3 times a year...most expensive track day I've paid for ($450).
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Old 01-15-2017, 07:04 PM   #12
No Go
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Update: Since the engine was tested on the dyno and road course, my schedule finally permitted a drag visit and autocross run...

Drag: Bradenton, Florida quarter mile.

Only 2 runs as the lanes were full:

12.44 @ 111 mph
12.28 @ 112 mph

I iced the intercooler to 60 odd degrees, but by the time I was up for the 'burn out' box, it was touching 100-not ideal.

Temps were 70 degrees and medium humidity.

4500 rpm clutch engagement...with a 60 foot of 1.8. I've done 1.73 before, so possibly more left in it along with cooler weather/intercooler...maybe a 12 flat?

I also noticed max boost during the runs was 20 psi...unsure of why the lower threshold (24 is more typical).




On a related note: Autocross validation...scored 5th of 99 cars...mostly sideways with the new found power!


Motor mileage now near 8000 miles covered.

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Old 01-15-2017, 07:24 PM   #13
2slofouru
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Stock cams and 93 pump?!?!?! Very nice
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Old 01-15-2017, 07:46 PM   #14
No Go
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Stock cams and 93 octane pump gas.

Drag runs were shifted at 7500 rpm...I wonder if an early shift point might also benefit. Nonetheless-car is a hoot with 21 mpg on the commute daily.
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Old 01-15-2017, 09:02 PM   #15
2slofouru
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My heads are getting worked at Larry's and I'm deciding on cams. They are getting larger valves and upgraded springs with a solid bucket conversion as well. I'm hoping the haltech elite and larger injectors will coax more out of the turbo, going to see what it can do and decide on the next turbo after the engine's been tuned and running a while.
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Old 01-16-2017, 01:13 PM   #16
Zcypot
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Was the turbo struggling to keep 20psi issue solved? Strong numbers!
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Old 01-16-2017, 01:26 PM   #17
No Go
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I reset the ECU thru the Cobb AP on the way home...and 24.5 psi illuminated.

Unsure of the issue...possibly temp related or possibly I just need to reset the ECU before starting the runs.

The autocross following was no issue...even hitting 25.5 on the first run-likely not advisable.

Thanks.
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Old 01-16-2017, 07:33 PM   #18
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Nice work. It is definitely possible for the turbo to run out of puff the if the heads are flowing really well. I havent seen many people run more than 22psi on stock 2.5's.

Looks to me like a step up in turbo would really shine and still have good response. I think thats why your mph is quite low for your et.

850's are fine for a 1.5XTR on 93. But you wont be able to run E85 on them.

Where are you measuring the boost signal, perhaps you are measuring before the intercooler?
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Old 01-16-2017, 09:08 PM   #19
Rizen
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I put down 450whp on a Dom 2.5 XT-R and was trapping 124.5 so I think 412WHP is probably a bit optimistic. But every dyno reads differently, all that really matters is you enjoy the car.
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Old 01-17-2017, 11:43 AM   #20
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I have a very similar setup on my 13 wrx, breaking in the engine build now and hope to put up similar numbers. I do however, have larger fuel pump, 1200cc injectors, and e85 setup. How to make more on the e85.
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Old 01-17-2017, 02:35 PM   #21
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I suspect that's a very high reading Mustang dyno. I would've expected trap speeds 10-11mph higher than that.

With that high rpm power drop, shift at 7300 at the latest.

Last edited by Noize; 01-17-2017 at 06:35 PM.
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Old 01-17-2017, 05:35 PM   #22
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Agreed the dyno figure is way too high, should be somewhere around 350whp. I agree with changing gears earlier, perhaps even 7000.
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Old 01-17-2017, 06:54 PM   #23
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well, aren't those cosworth heads the ones with a large valve job? can't imagine what it'll take to feed them properly, a 1.5xtr isn't a good match for them heads I would think, just hit the knowledge limitation here, lol
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Old 01-17-2017, 07:23 PM   #24
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Quote:
Originally Posted by snake32 View Post
well, aren't those cosworth heads the ones with a large valve job? can't imagine what it'll take to feed them properly, a 1.5xtr isn't a good match for them heads I would think, just hit the knowledge limitation here, lol
Exactly, need at least a 2.5XTR sized turbo.

1.5XTR's were originally designed for ej20s but they turned out to be a great responsive street turbo for a stock ej25. Definitely too small for a ej25 with high flowing heads, especially one that sees track time.

Last edited by Harey; 01-17-2017 at 07:33 PM.
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Old 01-17-2017, 09:02 PM   #25
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I'm not sure about that. Having easy flow from the heads into the turbo and out seems like it would allow it to work way better, especially considering the power band he seems to be using. Wouldn't the air be cooler at the lower boost level and more efficient?

My heads are getting some serious cnc work and I will be running my stx20g-r and maxing it out, I have the killerB holyheader and 3" all the way back. There will be no excuse for my turbo to show what it can do. Mine is a slightly smaller turbo but we shall see. Obviously dynos read differently so it could be inflated, maybe he could check on a dyno dynamics somewhere to be more accurate?
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