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Old 03-03-2010, 11:34 PM   #1
bedheadben
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Join Date: Jan 2008
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11 WRX Hatch
Stage 2

Default TD06 7cm 18G on a 2.0L WRX

What's wrong with my car?
Event: dyno pull
Location: Yimi Sport Tuning, Santa Clarita, CA
Ambient Temp: 67.44 F
Elevation: 1200 feet
Weather: night
Tires: Hankook RS2 225/45/17

Car: 2004 WRX Wagon
Tuner: Paul Leung
Dyno Info: Dynojet
Peak HP at RPM: 273.1 @ 6400rpm SAE corrected
Peak Torque at RPM: 256.71 @ 4600rpm SAE corrected
Baseline hp/tq for a stock on same dyno: unknown
Target Boost: 20psi tapering to 19psi
Target AFR: 11
Fuel: 91 unleaded
Engine/Power Modifications:
Invidia Up Pipe
HKS catless downpipe
Borla Hush
K&N Air Filter
Spec-B Blow Off Valve
eBay Top Mount Intercooler
FP 7cm 18G
Crucial Racing 160* thermostat
Gates Racing Kevlar timing belt
ACL race rod bearings
ACL race main bearings
Mahle 4032 forged pistons
08 STi oil pump (modified)
deck heads, 3 angle valve job
DW750 top feed injectors
Walbro 255lph fuel pump
Driveline Modifications:
Exedy stage 1 clutch
Suspension Modifications:
Subtle Solutions 1" lift all around
Paranoid Fabrications 1/4" lift in rear
Other Modifications:
OEM STi BBS
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Last edited by bedheadben; 03-03-2010 at 11:57 PM.
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Old 03-04-2010, 12:24 AM   #2
reddevil
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goes 12.387 @ 116.5

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Nothing actually looks wrong....

what does a stock wrx run? Scaling issue for the dyno?
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Old 03-04-2010, 12:37 AM   #3
bedheadben
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Stage 2

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I don't know but I've seen very similar setups but with stock motors run 295/290 on his dyno. Maybe my car's just super weak.
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Old 03-04-2010, 02:03 AM   #4
Fierysun
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Stock exhaust manifold?
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Old 03-04-2010, 02:08 AM   #5
howfast?
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Subaru Stars

^My 03 wag tuned by Tim with vf39, pinks/pump, PWR tmic, inlet, sri, koyo, sti up, hfcatted 3" turboback, stock ebcs made 285/275 @ 20psi on that dyno in temps exceeding 100 degrees about a year ago fyi... maybe recalibration?

how does the car feel though...

maybe bad gas?

Last edited by howfast?; 03-04-2010 at 02:33 AM.
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Old 03-04-2010, 02:11 AM   #6
bedheadben
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Stage 2

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Yes stock exhaust manifold, and those numbers are further evidence that something may not be right.
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Old 03-04-2010, 02:15 AM   #7
howfast?
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yea should be 315+ easy... nice parts list btw
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Old 03-04-2010, 02:17 AM   #8
bedheadben
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It's definitely not a 300hp car by feel, I don't think anything was re-calibrated. Thanks for the compliment.
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Old 03-04-2010, 02:28 AM   #9
Thran
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i am actually going to get retuned and have a similar setup
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Old 03-04-2010, 02:28 AM   #10
nolanator
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342whp/317wtq on 91

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i made 273/267 at Yimi with a ported VF39 2 weeks ago
you and i have basically the same bolt on power modifications other than my short ram intake and 650cc injectors.
i also would think you would make a little more power

Last edited by nolanator; 03-04-2010 at 02:52 AM.
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Old 03-04-2010, 03:15 AM   #11
socalLGT
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It is what it is. I have made over 300whp with similar cars/mods, but individual cars are as unique as fingerprints and they will all behave differently and see different results. As the tuner, all I can do is determine the optimal set of operating parameters and allow the car to make as much power as it can repeatably. Sometimes it ends up being more than I would normally expect, some times unfortunately it is less.

About the only things I can point to on Ben's car would be the Ebay TMIC and the stock airbox. I typically see about 5-10 whp more on cars with intakes and I have never been a fan of the Ebay TMIC's. While they are large, the quality and design of the cores leaves a lot to be desired. I doubt that they are costing 25+whp but at the very least they aren't helping. Of course I respect Ben wanting to keep the stock airbox after a near disaster involving some deep standing water and his old CAI, but there is power in a good intake.
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Old 03-04-2010, 03:22 AM   #12
Fierysun
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Quote:
Originally Posted by bedheadben View Post
Yes stock exhaust manifold, and those numbers are further evidence that something may not be right.
The stock exhaust manifold and crosspipe is quite restrictive. I think that is where you are losing your power. Have you considered EL headers?
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Old 03-04-2010, 03:26 AM   #13
bedheadben
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Stage 2

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Hey Paul, although the power may not be as much as I was expecting those curves are still nice and flat and I am very happy with the way it drives. There's a reason why that was my 4th tune I've got from you and I'm sure I will be coming back again when I need another. Thanks for always staying past closing time to make sure the tune goes right . Anyways, I got the car for 7k so I can't complain too much

Quote:
Originally Posted by Fierysun View Post
The stock exhaust manifold and crosspipe is quite restrictive. I think that is where you are losing your power. Have you considered EL headers?
I love the Suby rumble too much to go to equal length. This is not my track car. I've set it up to have the most amount of fun, and sounding the way I want it to is a large part of that. Now if there were any good aftermarket unequal length headers out there I may reconsider.
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Old 03-04-2010, 03:42 AM   #14
Fierysun
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Quote:
Originally Posted by bedheadben View Post

I love the Suby rumble too much to go to equal length. This is not my track car. I've set it up to have the most amount of fun, and sounding the way I want it to is a large part of that. Now if there were any good aftermarket unequal length headers out there I may reconsider.
Tomei makes a good UEL headers.

Maybe another 10+whp with UEL.
Around 5-10+whp with aftermarket intake.
Another 5-10+whp with either a Spearco/Turbo XS TMIC.

That should get you close or over 300whp.
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Old 03-04-2010, 03:45 AM   #15
socalLGT
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SWP

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Quote:
Originally Posted by Fierysun View Post
Tomei makes a good UEL headers.

Maybe another 10whp with UEL.
Around 5-10whp with aftermarket intake.
Another 5-10whp with either a Spearco/Turbo XS TMIC.

That should get you close or over 300whp.
That is some FINE ricer math! Although in this case it might actually be true
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Old 03-04-2010, 03:53 AM   #16
Fierysun
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Quote:
Originally Posted by socalLGT View Post
That is some FINE ricer math! Although in this case it might actually be true
Have you ever (during your non-busy days) dyno-ed and tuned certain parts combo just to see what power it will make? Such as testing each one of these components (intake, headers, and tmic) separately and then adding them one at a time.
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Old 03-04-2010, 03:55 AM   #17
07wrxwagon
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Quote:
Originally Posted by socalLGT View Post
That is some FINE ricer math! Although in this case it might actually be true
LOL, this made my night.
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Old 03-04-2010, 04:06 AM   #18
socalLGT
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SWP

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Quote:
Originally Posted by Fierysun View Post
Have you ever (during your non-busy days) dyno-ed and tuned certain parts combo just to see what power it will make? Such as testing each one of these components (intake, headers, and tmic) separately and then adding them one at a time.
Non-busy days... I did a dedicated header test for Full-Race a while ago and found VERY solid gains attributable to the header/uppipe alone. As for the other parts my estimates and expectations for the power gained by each part are largely inferential. For instance, most stage 2 STI's with the stock airbox usually clock in around 290-300 whp. With intakes, I find most are between 300-310. From that I can infer that the intake is worth about 5-10 whp. I know that is hardly scientific, but the trend is definite and convincing enough to me to pretty conclusively say that a good intake will add to the power potential of a given setup.

Similarly, I have found a good set of EL header is worth 10-15whp and 15-20wtq. I do remember adding only Tomei EL headers to one 08 STI and that is pretty much exactly what it gained.
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Old 03-04-2010, 04:26 AM   #19
Fierysun
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Quote:
Originally Posted by socalLGT View Post
Non-busy days... I did a dedicated header test for Full-Race a while ago and found VERY solid gains attributable to the header/uppipe alone. As for the other parts my estimates and expectations for the power gained by each part are largely inferential. For instance, most stage 2 STI's with the stock airbox usually clock in around 290-300 whp. With intakes, I find most are between 300-310. From that I can infer that the intake is worth about 5-10 whp. I know that is hardly scientific, but the trend is definite and convincing enough to me to pretty conclusively say that a good intake will add to the power potential of a given setup.

Similarly, I have found a good set of EL header is worth 10-15whp and 15-20wtq. I do remember adding only Tomei EL headers to one 08 STI and that is pretty much exactly what it gained.
Good info...and my ricer math isn't too far off.
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Old 03-04-2010, 09:55 AM   #20
bedheadben
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Quote:
Originally Posted by socalLGT View Post
That is some FINE ricer math! Although in this case it might actually be true

Ya but I'm not going to be spending 800 bucks on headers any time soon. I'm pretty happy with the car the way it is.
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Old 03-04-2010, 10:52 AM   #21
WMCCook29
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Is the downpipe the bellmouth or flat flange? If it's the later, could this be causing some restriction?
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Old 03-04-2010, 11:20 AM   #22
MENU
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stop running **** gas, either 93 or e85 and you will be over 300whp easily
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Old 03-04-2010, 02:26 PM   #23
nolanator
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Quote:
Originally Posted by MENU View Post
stop running **** gas, either 93 or e85 and you will be over 300whp easily
thats CA for you.
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Old 03-04-2010, 02:54 PM   #24
Concillian
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Quote:
Originally Posted by MENU View Post
stop running **** gas, either 93 or e85 and you will be over 300whp easily
Maybe you can send him a couple 55 gallon drums so he can run one of these fuels. Think you could hook that up for him since you want him to do it so badly?

93 is completely unavailable in CA, and there's like one e85 station in a 300 mile radius of Los Angeles.
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Old 03-04-2010, 05:01 PM   #25
bedheadben
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Yup unfortunately I'm stuck with crap Cali gas. Feel free to send me some 93 though. It's the flat flange HKS downpipe.
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