Project Hatch (aka project grocery getter part II) - Page 9
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This is a discussion on Project Hatch (aka project grocery getter part II) within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; thought you guys might be interested in a stock 09 dyno run (dynojet, 3rd gear pull)- I saw slightly underrated ...

  1. #121
    Moderating on the run! Big Sky WRX's Avatar
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    thought you guys might be interested in a stock 09 dyno run (dynojet, 3rd gear pull)- I saw slightly underrated from the factory- look at the torque #'s

    pic courtesy of subytek


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  3. #122
    Moderator   Sasquatch's Avatar
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    Wow ... stage 2 will make it a monster.
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    Registered User 05Wrex's Avatar
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    Nice numbers especially for stock. Did you do a reflash while out there or are you gonna leave the map stock.
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    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by 05Wrex View Post
    Nice numbers especially for stock. Did you do a reflash while out there or are you gonna leave the map stock.
    that's not my run, rather subtek's,- mine only has 350 miles on it

    I plan on getting a base dyno run w/ mine after 1000 miles- I'm going to run D Stock next year- so no flash. I am going to get a few runs stock and then bolt on my catback/panel filter and see if there is any bump
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  6. #125
    Registered User wrx wagone's Avatar
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    Those are some seriously crazy numbers. What is the 08-09 STi doing stock?

    Also, this car is going to be a monster in DS.
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    Moderating on the run! Big Sky WRX's Avatar
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    my understanding is slightly higher, considering the vf52 is essentially the vf48 squeezed into a LGT style housing and they share the same block- makes sense that the #'s are going to be somewhat close

    clearly they underrated the #'s on the 09 WRX, probably much less underrated on the STi
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  8. #127
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by Big Sky WRX View Post
    my understanding is slightly higher, considering the vf52 is essentially the vf48 squeezed into a LGT style housing and they share the same block- makes sense that the #'s are going to be somewhat close
    That's what I was wondering. I'll have to look to see what the stock boost is for these two. Depending on the gearing, (5MT usually better for AX) I'm curious if this thing could give the STi a run in STU.
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    Registered User 05Wrex's Avatar
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    Quote Originally Posted by Big Sky WRX View Post
    that's not my run, rather subtek's,- mine only has 350 miles on it
    Yeah don't know what I was thinking.
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    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by wrx wagone View Post
    That's what I was wondering. I'll have to look to see what the stock boost is for these two. Depending on the gearing, (5MT usually better for AX) I'm curious if this thing could give the STi a run in STU.
    stock boost for the 09's WRx is reportedly 13.3 psi, STi reportedly 14.7

    the 08 WRX was 11.3 IIRC
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    Why such a big variance among the 3 dyno runs? Heat soak?

    Impressive torque numbers, though. It would be nice if the torque curve were flatter instead of dropping off after 4000 rpm, but still pretty awesome with over 200 ft-lbs from 3000 to 5500rpm.
    Last edited by jabrabu; 10-27-2008 at 08:15 AM.

  12. #131
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by Big Sky WRX View Post
    stock boost for the 09's WRx is reportedly 13.3 psi, STi reportedly 14.7

    the 08 WRX was 11.3 IIRC
    The lower boost on the 09 WRX, would hurt it against the STi. It is only a pound or so... this may be interesting,
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    I am a little confused, max power from that 09 is 230 hp, but I thought that 09 had 265 hp. I thought that the 265 hp was at the wheels, but it sounds like that must be at the crank.

    Just seems weird because the stock values are 265 hp and 244 ft.lbs of torque; and yet the numbers that you provided the torque is higher than the power. Am I missing something?

  14. #133
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by gearhead364 View Post
    Am I missing something?
    Welcome to the world of fabricated, or at least underrated, power numbers from the manufacturer. Subaru states numbers at the crank, where the dyno numbers are at the wheels.
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    Quote Originally Posted by wrx wagone View Post
    Welcome to the world of fabricated, or at least underrated, power numbers from the manufacturer. Subaru states numbers at the crank, where the dyno numbers are at the wheels.
    In that case, WOW, those numbers are good 272 ft.lbs at the wheel, just a little underrated.

    Question, does anybody know how torque and power losses scale with relation to each other? Is it simply a linear relationship since Tq = P * revs?

  16. #135
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by jabrabu View Post
    Why such a big variance among the 3 dyno runs? Heat soak?

    Impressive torque numbers, though. It would be nice if the torque curve were flatter instead of dropping off after 4000 rpm, but still pretty awesome with over 200 ft-lbs from 3000 to 5500rpm.
    yes heat soak, he stated it was pretty bad

    those numbers are at the wheels (whp)- figure roughly a 20% drivetrain loss for an awd Impreza vs crank (chp)

    not sure on the torque equation- I'll let someone else to a stab at that
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