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Dyno run - Good, Bad or Ugly??? - Page 4
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Thread: Dyno run - Good, Bad or Ugly???

  1. #31
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    Hey Retroguy and welcome to the forum (excuse the kids, things used to be a little more relaxed here). Great mods, dont sweat the dyno, if youre happy with the power then its all good. Did you get to drive the car without any mods or did it come that way?? Id say that difference would be much more important than one stand alone dyno run. I had my car for about 1500km before I added pretty much the same stuff as you. I noticed a MASSIVE difference in performance from a reasonably nippy motor to what I describe as "violent" acceleration for such a small car. So much so I recommend a suspension upgrade to keep it all in check!

    Im approaching 38k on the clock now at the year of ownership point, no problems, no engine lights just happy motoring. The MM boxes have been very good to me (no remotes for me-always on full and always drive with SPORT on), I borrowed a TMC box for a weekend ``just to see`` and the MM felt faster off the mark. Not tested the RRM so cant comment on that as such. All in the ECMs are great bang for buck, the MM PP is a nice touch but loses a little when added with an ECM and the EuroComp intake is an excellent addition too...

    Haters gonna hate and all that, youll get used to the `noise`but enjoy the car and let us know how it goes

  2. #32
    Senior Member Ryephile's Avatar
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    Quote Originally Posted by Retroguy View Post
    ....Ryephile, you know that's a really astute observation. I know that the technician shut the car down for 5 minutes before the second run, and maybe he just plain forgot to press the sport button. In any case, I do not notice any difference between pulls on the street. Seems the same to me, so that's why I scratched my head when he talked about heat soak. And you are right, torque is noticeably improved according to my butt dyno.

    Does anyone think that adding a blow off valve would make any significant difference to these curves?

    Thanks all

    Doug
    You're welcome. Knowing the operator shut down the car, it's very plausible the 2nd run is in normal mode. It matches up cleanly.

    A BOV would not change the power curve unless yours is leaking for some reason. A higher flowing BOV would reduce turbo compressor surge, which allows for quicker boost response during gear changes.

  3. #33
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    Quote Originally Posted by sfhpawel View Post
    -

    - The MM unit, has had nothing but terrible review all accross the board. You see them in the classified section all the time. The only good thing about them is you can show up at the Studio with it installed since its a MOPAR accessorie...
    Just to be clear, the MM piggie back unit(s) are not Mopar Accessories.

    Mike

  4. #34
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    Quote Originally Posted by Ryephile View Post
    Knowing the operator shut down the car, it's very plausible the 2nd run is in normal mode.
    Yup. That's where I would place a paycheck bet. Right there.

  5. #35
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    Hey guys, just wanted to try and help out. I'd highly suggest comparing to our most recent dyno testing, the link provided is outdated, new one is here:

    http://www.fiat500usaforum.com/showt...highlight=dyno

    Reason being, we worked with MM to help figure out the best % numbers for their programming. It isn't just "crank it higher for more power" type of situation, diminishing returns show up pretty fast. To me it seems like maybe the sport button was off on the second run, heat soak wouldn't bring the numbers down that much in that short of a time. Also these MultiAir engines run different than most of us old-school tuners are used to. If you don't have enough air coming from the fan it will detune itself somewhat, very picky. As far as the MM boxes not being that good, and people getting rid of them, I don't see that. We sell so many of these boxes, we get shipments of 25-50 boxes at a time and they get sold almost right away, we've sold and installed 100s of them, very very few hit the resale market, you must remember that as much as we love the forums, and the great community it builds it only represents a very small portion of FIAT 500 owners. With your set-up you should be smiling every time you hit the throttle!
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  6. #36
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    Here's a thought... It's possible something caused the car to go to safe mode. Wouldn't that cause big loss??

    As for the MM, there's been a conspiracy for a while and this happened in the UK but folk blaming the TMC for issues. My MM has never caused any issues or CELs. They aren't junk - FACT.

    Enjoy the car!

  7. #37
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    Quote Originally Posted by Ryephile View Post
    You're welcome. Knowing the operator shut down the car, it's very plausible the 2nd run is in normal mode. It matches up cleanly.

    A BOV would not change the power curve unless yours is leaking for some reason. A higher flowing BOV would reduce turbo compressor surge, which allows for quicker boost response during gear changes.

    I've even forgotten to re-hit the sport button between auto-cross runs before... with all the excitement and adrenaline, it's not that hard to do. Another buddy tried getting his Ab dyno'd recently and had a host of challenges... they said the car was too short of a wheelbase, they said the ABS was messing things up, they said the ECU thought the e-brake was on, etc. etc. etc. Apparently lots of things can go wrong on a dyno. I was wondering if pulling the ABS/ECS fuse out before a run might help with some of these issues...something we used to do back in the day.
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