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Go Back   IWSTI.com: Subaru STI Forums > STi Technical Discussion > Engine, Power, & Performance > Water-Meth Injection / Nitrous & Intercooler Cooling


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Old 07-27-2007, 07:32 PM   #1
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Car: 06 STI - SGM
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Default Snow Meth Injection and XXTuning Protune...

I've seen the XX guys at the tracks, shared asphalt with them, and they know how to prepare an STI for the grind. Chris spoke with me about what I'd be doing with the car...drag?street?track?...and I answered autox and roadcourse.
The roadcourse-use dictated a conservative tune, as 20 minute track sessions demand more safety than 12 second drag pulls. With that decided, off to the dyno...

My mod list:
*06 STI with the following mods:
*Fram AirHog airfilter- That's right, AirHog...K&N doesn't have an animal mascot so they lose out
*Prosport Header with included uppipe
*used Perrin catless downpipe
*used 3" exhaust...didn't know what kind but XX told me it is an old APS - picked it up for peanuts, I won't share how much because you'd all hate me then.
*Snow Performance water/meth injection kit with MAF controller
*2/3 meth...1/3 water - easy to measure with gallon containers for my 12L tank
*Cobb V2 Accessport with Stage 2 tune

That's it. Not a whole heck of alot of engine stuff, but enough for some fun...

Baseline of Cobb Stage 2:
280hp at 5300 rpm
300tq at 3600 rpm
-Chris at XXTuning asked if my car was tuned prior, I said no, because he was impressed with the numbers.

The tuning started...
Several pulls later he was done:
320hp at 5300 rpm
380tq at 3350 rpm
What is most surprising, besides the peak gains, is the area "under the curve" and how the curve shifted very much to the "left".
-At 3000 rpm the numbers went from 200tq to 320tq = +120tq
-At 3200 rpm the numbers went from 220tq to 370tq = +150tq
I don't spend much time under 4K rpm on the roadcourse, but autocross puts me down in the low 3K rpm range at times...I wonder how an extra 150tq coming out of corners is going to affect my times....(insert ****-eating grin here)

Without needing to say it, the car feels quite transformed and I am very pleased.

Be good,
TomK


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Old 07-28-2007, 02:54 AM   #2
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Default Re: Snow Meth Injection and XXTuning Protune...

very nice Tom, it has to feel like an animal on the street with all that new TQ...+150

Matt
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Old 07-31-2007, 12:22 PM   #3
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Default Re: Snow Meth Injection and XXTuning Protune...

Thanks Tom!


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