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What's your theory on the RS NOT giving out advertised power numbers? Disappointed.

This is a discussion on What's your theory on the RS NOT giving out advertised power numbers? Disappointed. within the Focus RS Discussions forums, part of the Focus RS Forums category; alright - so i wasn't able to find any good long empty flat roads by me to get some good long runs in. the weather ...

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Thread: What's your theory on the RS NOT giving out advertised power numbers? Disappointed.

  1. #481
    RS Member meelaud's Avatar
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    alright - so i wasn't able to find any good long empty flat roads by me to get some good long runs in. the weather was in the low 70's (70% humidity), 500ish feet above sea level around 10pm CST- but half my runs from 1st to 3rd felt AMAZING - the other half felt underwhelming. It really does feel like two different cars. with the runs that felt AMAZING, there was a noticable "overboost" surge from 4500ish to redline that really pushed you back. But when the ECU deemed that "overboost" wasn't an option - it felt super slow...very much like a VTEC Honda - lots of sounds, but not much go.

    according to the PerfExpert app - my best run yielded a 285WHP "dyno". i'll have to tinker with it somemore...as I couldn't get more than a 5.5 second run w/ WOT ...gave me super low torque numbers because of this. so take this "dyno" number with a huge grain of salt.

    but it's good to know that when the "overboost" is avaiable - the car felt like the advertised 350hp
    RocketRS likes this.
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  2. #482
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    Someone else wrote about the erratic power as well, iirc, just like you describe it.

    I don't remember whether anyone explained what was going on though.

  3. #483
    RS Senior Member MNFoRS's Avatar
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    Quote Originally Posted by meelaud View Post
    alright - so i wasn't able to find any good long empty flat roads by me to get some good long runs in. the weather was in the low 70's (70% humidity), 500ish feet above sea level around 10pm CST- but half my runs from 1st to 3rd felt AMAZING - the other half felt underwhelming. It really does feel like two different cars. with the runs that felt AMAZING, there was a noticable "overboost" surge from 4500ish to redline that really pushed you back. But when the ECU deemed that "overboost" wasn't an option - it felt super slow...very much like a VTEC Honda - lots of sounds, but not much go.

    according to the PerfExpert app - my best run yielded a 285WHP "dyno". i'll have to tinker with it somemore...as I couldn't get more than a 5.5 second run w/ WOT ...gave me super low torque numbers because of this. so take this "dyno" number with a huge grain of salt.

    but it's good to know that when the "overboost" is avaiable - the car felt like the advertised 350hp
    Quote Originally Posted by Bruno View Post
    Someone else wrote about the erratic power as well, iirc, just like you describe it.

    I don't remember whether anyone explained what was going on though.
    This is exactly what pushed me to a tune. It's no longer inconsistent on power delivery.

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  5. #484
    RS Master Basie's Avatar
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    Beat the dead horse as Chrisp has pointed out.

    Butt dyno and feelings dont count in the real world. 6k or dont bother posting stats imo. You wont see the boost until you are digging in like a mad man. At that point, for the safety of others and yourself, don't be looking at you boost gauge.


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    Last edited by Basie; 04-21-2017 at 05:07 AM.

  6. #485
    RS Specialist Chrisp's Avatar
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    Quote Originally Posted by Kung Fu English View Post
    I think it's been found if you start a WOT pull under 2500 rpm something with the ecu limits power somehow vs starting over 2500. Adam Brunson has mentioned it.

    I noticed it too and it happens on street a lot because you short shift into 2/3 and then gun it starting around 2k and it just feels so slow. But racing you always shift at redline and it feels good.

    I don't know why the ecu does it and it seems dumb to program it like that. But I digress.

    Sent from my iPhone using Tapatalk
    Maybe it's the ECU proactively trying to prevent low speed pre-ignition?


    Quote Originally Posted by meelaud View Post
    alright - so i wasn't able to find any good long empty flat roads by me to get some good long runs in. the weather was in the low 70's (70% humidity), 500ish feet above sea level around 10pm CST- but half my runs from 1st to 3rd felt AMAZING - the other half felt underwhelming. It really does feel like two different cars. with the runs that felt AMAZING, there was a noticable "overboost" surge from 4500ish to redline that really pushed you back. But when the ECU deemed that "overboost" wasn't an option - it felt super slow...very much like a VTEC Honda - lots of sounds, but not much go.

    according to the PerfExpert app - my best run yielded a 285WHP "dyno". i'll have to tinker with it somemore...as I couldn't get more than a 5.5 second run w/ WOT ...gave me super low torque numbers because of this. so take this "dyno" number with a huge grain of salt.

    but it's good to know that when the "overboost" is avaiable - the car felt like the advertised 350hp
    Despite what Ford has said in the past, @Bugasu showed that the overboost function has a countdown clock. So basically (anyone please correct me if I'm wrong) it is available for 20 seconds max and if you hit the 20 seconds it will not be available again until it counts back down so you need to wait for at least another 20 seconds.
    Last edited by Chrisp; 04-21-2017 at 07:22 AM.
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  7. #486
    RS Member meelaud's Avatar
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    Forgive me as I do not know much about dynos. But wouldn't a low gear dyno (2nd gear, 1st if possible) pull and a high gear (3rd or 4th gear) pretty much lay this argument to rest?

    From some searching here - the temporary over boost seems to provide 25ish more ft pounds at the wheels - which is something one would definitely feel (i know, i know - feelings blah blah). not complaining, as that extra surge feels great.
    2017 Focus RS - Stealth Gray - my realistic dream car
    2001 Nissan Xterra 4x4 - my high school dream car
    A bunch of fixie bicycles because Austin
    Past: 11 Subie WRX, 95 Mitsu Montero SR, 02 Subie WRX, 07 Honda Civic Si, 03 Evo VIII, 03 VW GTI 20th Ann, 03 Mini Cooper S, 01 Saab 9-5 Aero, 95 Land Rover Disco 5-speed

  8. #487
    RS Specialist Chrisp's Avatar
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    Can you calibrate your butt dyno to account for gearing? lol I kid. You want to dyno in the gear that's closest to 1:1. The torque tables showing overboost have been posted here.


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    You guys agonizing over advertised power numbers but most of you fully intend to modify yours for more power anyways so who cares that the numbers may have been exaggerated?
    I have both an R/T Hemi and a Vette in my garage for racing purposes.I play with them.My RS is a DD and performs spectacularly.It replaces an old junk 330Xi and I gave my '10 Ranger to my wife.
    In traffic this RS is AWESOME!!! And it Corners even BETTER!!
    Sikmrex and meares like this.

  10. #489
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    hey wait a min. Chrisp....you said to red line it in every gear BEFORE it reaches mile 10 or the ECU will permanently be stuck in low boost mode....soooo, apparently all these gents haven't followed your sage advice

  11. #490
    RS Senior Member Macmorgan's Avatar
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    While on this subject, I was having a talk with a old friend about oil and power. As he's built a lot of engines for varies powersports and has his own dino I take his information very seriously. He mentioned that oil temperature had a lot to do with maximum hp being achieved and that it was interesting to see how much of an increase was achieved once the oil had gotten over 200+ degrees. Probably the way the molecules link up at higher temps.

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