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  1. #1
    Senior Member Three Rings RBSileighty's Avatar
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    Dyno'd my S4 Avant... heat soak is a... it's not cool

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    Did a few pulls the other day after work the other day (perks of our sister company having a dyno)... might take some more video in the future with a 7D, but this will work for now. I did a few pulls with the hood open then a few with it closed... with the hood open and about 5 pulls I was consistantly around 270awhp on a dynojet... 272 being the best. Once I closed the hood my first pull was 267awhp... and 3 pulls later 251 (pull in the video)... gotta love heat soak. It was about 75deg and humid that day... but the graphs are SAE corrected and smoothing was on 5 for that vid... car is 100% stock with a K&N filter (came with the car when I bought it, looks like it could be freshened up), 3k miles on Castrol 5W40 synthetic (chain rattle is gone and oil consumption went from 2qt/500mi to 2qt/~3k when I changed from Mobil 0W40) airbox flap deleted and the snorkel has been removed (playing around with some ideas and using the stock piece)



    Anyone coming out with a tasteful vented hood anytime soon? Haha

  2. #2
    Veteran Member Four Rings witwer4444's Avatar
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    Isn't the B6 S4 4.2 340HP from factory? Or is that crank horse?
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  3. #3
    Veteran Member Four Rings JimmyBones's Avatar
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    Quote Originally Posted by witwer4444 View Post
    Isn't the B6 S4 4.2 340HP from factory? Or is that crank horse?
    The factory 340HP is at the crank so then the OP has a twenty percent or so loss to the wheels. It is not bad with the mechanical all wheel drive/quattro that Audi uses.
    Former Audi dealership tech

    Current cars:
    2004 S4 6MT - JBones's Silver Bullet B6 S4
    2000 A6 2.7T 6MT - DD
    1991 BMW 850i 6MT - V12 project
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  4. #4
    Active Member Two Rings slo s4's Avatar
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    May 11 2009
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    04 S4
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    Good numbers for stock. Congrats, and the wheels look great rolling as well!
    Crank horsepower estimations are for suckers and cold air intake manufacturers

  5. #5
    Senior Member Three Rings Homer's Avatar
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    2006 A4 6MT Quattro, 1990 Volvo 240 Turbo
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    Quote Originally Posted by slo s4 View Post
    Good numbers for stock. Congrats, and the wheels look great rolling as well!
    Crank horsepower estimations are for suckers just like cold air intakes
    Reworded :D
    -Jacob
    1990 Volvo 240 Turbo-Project Car
    2006 Audi A4 6MT quattro- DD
    I've got a Hex-CAN VCDS cable if anyone needs to borrow it.

  6. #6
    Veteran Member Four Rings dparm's Avatar
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    20% loss to the wheels sounds right with 4WD. Roller dynos are not perfect either.
    now: 2011.5 BMW M3 sedan ZCP
    past: 2005 Audi S4 sedan, 2011 Audi S4 sedan

  7. #7
    Senior Member Two Rings
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    You are missing 2 key ingredients. Torque?

    And I wanna see the dyno graph (:

  8. #8
    Senior Member Three Rings RBSileighty's Avatar
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    Quote Originally Posted by FourRings4me View Post
    You are missing 2 key ingredients. Torque?

    And I wanna see the dyno graph (:
    Dyno graph is at the end of the vid... no tq or RPM b/c the engine was to hot to get to a wire for a tach pickup signal. I'll get all of that when I do the pull with the 7D filming and will post graphs, this was done "just because" when I was finished tuning our turbo Z33 mule car for work one night...

  9. #9
    Veteran Member Four Rings dparm's Avatar
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    Torque can be calculated from horsepower. It's just a formula.

    Wheels look nice.
    now: 2011.5 BMW M3 sedan ZCP
    past: 2005 Audi S4 sedan, 2011 Audi S4 sedan

  10. #10
    Veteran Member Four Rings SquiddyB6S4's Avatar
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    Quote Originally Posted by RBSileighty View Post
    Did a few pulls the other day after work the other day (perks of our sister company having a dyno)... might take some more video in the future with a 7D, but this will work for now. I did a few pulls with the hood open then a few with it closed... with the hood open and about 5 pulls I was consistantly around 270awhp on a dynojet... 272 being the best. Once I closed the hood my first pull was 267awhp... and 3 pulls later 251 (pull in the video)... gotta love heat soak. It was about 75deg and humid that day... but the graphs are SAE corrected and smoothing was on 5 for that vid... car is 100% stock with a K&N filter (came with the car when I bought it, looks like it could be freshened up), 3k miles on Castrol 5W40 synthetic (chain rattle is gone and oil consumption went from 2qt/500mi to 2qt/~3k when I changed from Mobil 0W40) airbox flap deleted and the snorkel has been removed (playing around with some ideas and using the stock piece)
    Good numbers. I hit 269awhp when I got mine at 56k, with absolutely zero mods. Sounds like a relatively efficient driveline IMO. Considering new it probably made a few more ponies . . .
    -Jason
    2004 B6S4 6MT - Apikol Snub Mount, Piggie Pipes, Magnaflow Cat-Back, JHM Tune with Launch Assist, Squid Rear LSD #01 20lb wheels + Michelin PSS
    2013 Veloster Turbo 6MT - For sale
    1996 Miata - DE car; every moving part new or rebuilt, almost stock
    1995 Accord Wagon - Beautiful, stock, DD Duty, trip-mobile, track day support wagon
    LifeWithSquid

  11. #11
    Senior Member Three Rings RBSileighty's Avatar
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    Quote Originally Posted by SquiddyB6S4 View Post
    Good numbers. I hit 269awhp when I got mine at 56k, with absolutely zero mods. Sounds like a relatively efficient driveline IMO. Considering new it probably made a few more ponies . . .
    Nice! Just curious... was that hood open or closed? Seemed to make a big diff on my car...

  12. #12
    Senior Member Two Rings
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    congrats buddy!! just what a healthy running s4 should dyno at

  13. #13
    Veteran Member Four Rings sean1.8t's Avatar
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    Quote Originally Posted by dparm View Post
    Torque can be calculated from horsepower. It's just a formula.

    Wheels look nice.
    torque is measured. horsepower is a formula from the torque that is measured. you can't have a formula without a variable

  14. #14
    Veteran Member Four Rings drew's Avatar
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    if you know horsepower relative to MPH you can calculate torque....

  15. #15
    Veteran Member Four Rings sean1.8t's Avatar
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    if im wrong please school me. but horsepower is a dirivative of torque. how can you find the horsepower of something if you don't have the torque? it doesn't make sense to me but i'd love to know if there is a way

  16. #16
    Veteran Member Four Rings drew's Avatar
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    i am pretty sure its: T = (5252 x HP)/RPM

  17. #17
    Veteran Member Four Rings sean1.8t's Avatar
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    yes, that is the equation. i already knew that. im saying, where are you getting the HP figure from?

  18. #18
    Veteran Member Four Rings drew's Avatar
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    Quote Originally Posted by sean1.8t View Post
    yes, that is the equation. i already knew that. im saying, where are you getting the HP figure from?
    oh i hear ya, i was just going off his post that he got 272 whp, so then we can just guestimate the rpm to fill in the blank...

  19. #19
    Veteran Member Four Rings jfunkey's Avatar
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    Quote Originally Posted by drew View Post
    i am pretty sure its: T = (5252 x HP)/RPM
    FTW.....I think the actual saying is work/time

    and yes you need to dyno with the hood open there isn't enough flow due to the car not actually moviung to cool the motor down.
    JHM war machine. Total transformation. JHM/Tune/headers/intake manifold.
    My B7S4. Faster then my old RS4 and First B7 S4 in the 12's

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  20. #20
    Veteran Member Four Rings sean1.8t's Avatar
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    oh i get it now. we're debating about two different things. carry on

  21. #21
    Veteran Member Four Rings MMMB00ST_A4's Avatar
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    Quote Originally Posted by drew View Post
    oh i hear ya, i was just going off his post that he got 272 whp, so then we can just guestimate the rpm to fill in the blank...
    Quote Originally Posted by sean1.8t View Post
    oh i get it now. we're debating about two different things. carry on
    Lol, I was wondering when you guys were going to figure out you weren't arguing the same topic. Almost sounded like "what came first? The chicken, or the egg?" And looks like i'll be dynoing with the hood open next time around...
    -Brandon

    APR | Oettinger | KW | iForged | Evolution Racewerks | Labree | Carbinio

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  22. #22
    Veteran Member Four Rings SquiddyB6S4's Avatar
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    Quote Originally Posted by RBSileighty View Post
    Nice! Just curious... was that hood open or closed? Seemed to make a big diff on my car...
    Hood closed, car moving = GTech.

    Just further proof for those out there that still don't believe that an accelerometer can be accurate. And for what it's worth, if I set out to make several passes in a row, they do get lower and lower, but not as pronounced as yours. First two or three might be within a few hp, but eventually it'll fall ~10hp, maybe 20hp on a hot day. On a really cold day, it might only fall a few hp. I will say that my new Pro RR reads a LOT lower, but it's just as consistent, and provides complete graphs. I just correct the numbers back to my old runs from my original GTech if I want "real" data (i.e. DynoJet-like numbers).
    -Jason
    2004 B6S4 6MT - Apikol Snub Mount, Piggie Pipes, Magnaflow Cat-Back, JHM Tune with Launch Assist, Squid Rear LSD #01 20lb wheels + Michelin PSS
    2013 Veloster Turbo 6MT - For sale
    1996 Miata - DE car; every moving part new or rebuilt, almost stock
    1995 Accord Wagon - Beautiful, stock, DD Duty, trip-mobile, track day support wagon
    LifeWithSquid

  23. #23
    Veteran Member Four Rings Justincredible's Avatar
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    They should take more time and set up your car better on the dyno. Its not suposed to be moving like that. Not bad for stock. Where was this place at in Mi?
    If you don't have haters, then you're not kicking enough ass.

    JHM powered 12.2 On the JHM Tune With Launch Assist for the Automatic JHM Nitrous kit/JHM headers all this in a Automatic.

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    I came here from Germany in the 6th grade. I could not read or write a lick of English. I am working to get better. Thanks and sorry. I always try to edit my posts for the best grammar and easiest reading.

  24. #24
    Senior Member Three Rings RBSileighty's Avatar
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    Quote Originally Posted by Justincredible View Post
    They should take more time and set up your car better on the dyno. Its not suposed to be moving like that. Not bad for stock. Where was this place at in Mi?
    I was the one who set my car up on the dyno... the car is in North Carolina now (as I moved here for a new job)... the shop is our sister company National Speed in Wilmington, NC. I think I mentioned earlier that it was a last min thing after tuning our Z33 Mule car on the dyno for a few hours, so when I couldn't easily get a tach pickup, I just did it without it... I'll do it again sometime soon, and get a better video with the 7D we have in our marketing dept...

  25. #25
    Veteran Member Four Rings sean1.8t's Avatar
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    ^crank those ratchet straps like a man!

  26. #26
    Established Member Two Rings dmanisgnarly's Avatar
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    Thread resurrection! RB are you still in wilmywood? Been here since 2013 and don't see many euros

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    2005 S4//K&N/Pod filter/Carbon MAF extension/APR Carbon NACA ram-air duct/JHM intake-mani spacers/Gutted piggies/Custom Catback/034 Motorsport billet engine mounts/19 Peelers/034 Snub/Neuspeed lowering springs/JHM stage 4 Kevlar clutch/Rallyarmor mudflaps/Rocketbunny V2 front diffuser/canards/HIDs/DRLs/LEDs/trailer hitch

    02' A4 1.8T Quattro

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