Wanting to dyno my ecoboost tomorrow tips

Discussion in 'Mustang S550 General Forums' started by FreePenguin, Oct 12, 2019.

  1. FreePenguin

    FreePenguin Well-Known Member

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    I have a 2017 ecoboost premium 6 speed manual with 3.31 gearing and ford performance tune.

    I was told to have it dyno’d in 5th because of 1.1 ratio in gear, will it be successfully able to be dyno’d with my long 3.31 gears and a speed limiter of 120 (ford tune)

    and what speed do I need to have it started off at to dyno? Do they just put it at like 1500r in 5th and wot?

    tips. I need to know what to expect and tell the guy. Because he said it prob won’t work due to he thinks car will be hitting speed limiter.
     
  2. NoVaGT

    NoVaGT Well-Known Member

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    I'd ask why you're dynoing it.

    It sounds like there's technical issues with doing so, since the Ford tune continues the 120MPH top speed, and your trans doesn't have a 1:1 gear.

    So, results might be questionable.
     
  3. Silver Bullitt

    Silver Bullitt Well-Known Member

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    You're going to have to dyno it in 4th. Not sure your redline, but 6500 rpm in 4th would be right at the limiter. Shift through the gears and then bring it up to 2000 rpm and hold it there until he gives you the nod. Mash it to the floor and let off at redline or if it hits the limiter. Clutch in, shift to neutral, clutch out and just let it coast until it stops. Do not apply the brakes when you are still spinning the drum. I honestly don't think 4th vs 5th is going to yield significantly different results, so someone correct me here if I'm wrong.
     
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  4. OP
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    FreePenguin

    FreePenguin Well-Known Member

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    I just read there's a fuse or a plug or something someone can unplug from engine bay that disables all traction control etc, for a dyno, but im not sure exactly what it is. No pics or anything.
     
  5. Bikeman315

    Bikeman315 Well-Known Member

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  6. ForYourOwnGood

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    Ford PP1 tune removes the speed limiter. I dyno'd my ecoboost with the same setup in 5th with no issues. Unplug the TCS plug by the drivers front strut tower.
     
  7. TicTocTach

    TicTocTach Well-Known Member

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    Lots of airflow through the front. Wait a few minutes between pulls if you don't have an aftermarket intercooler. I recommend making sure you (if you can) or the dyno operator (most likely) start your pull at 2K rpm. The EB makes a lot of low RPM torque, and you'll miss that grunt if you start at 3K or higher. I didn't realize that the operator running my car was starting at 3K, so I've got to make sure they start at 2K next time. Mine has 3.55 gears, and was able to pull to redline or around 145mph. Here are the results of my stone-stock '18 A10 EBPP tested in 7th (1:1 in the A10).

    48888250807_d11814e570_c.jpg2019-08-22_Baseline_Dyno by clair_davis, on Flickr

    The lowest pull on mine was done about 30 seconds after the previous pull, so the IC was heat soaked.
     
  8. OP
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    FreePenguin

    FreePenguin Well-Known Member

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    This was on a mustang dyno, which I guess reads generally 10% lower than dynojet. If that holds true to this, that puts my eco at 292hp and 411tq at the wheels.

    All I have is catback and ford performance tune. I’d didnt pull the fuse or unplug it, I figured would be fine. I just disabled advance traffic via toggle.

    6859D9EF-1AAC-4969-B5F1-1EAA65CDBEA6.jpeg
     
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  9. BlackandBlue

    BlackandBlue Well-Known Member

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    Those are good looking numbers.
     
  10. OP
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    FreePenguin

    FreePenguin Well-Known Member

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    I don’t understand why my car is dying off in power, unless it’s due to speed limiter. It just nose dive while the ford one keeps going while mine does at 4500. My guess- speed limiter.

    I have 3.31 gears too, I don’t know if they have 3.55 or 3.73 but i bet there’s isn’t a non performance pack and limiter isn’t kicking in. D4423061-9E61-45AE-9B8C-BD5D73BA9C40.png 8D179CB3-58CD-45B1-9A51-1DBEDACAD63C.jpeg
     
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  11. TicTocTach

    TicTocTach Well-Known Member

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    If my tune ends up with those numbers, I’ll be an extremely happy camper. Great results!
     
  12. OP
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    FreePenguin

    FreePenguin Well-Known Member

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    I used stock airbox w drop kn finter.

    ford perf sent me an email saying it’s perfectly fine and they will honor warranty because I didn’t have it installed with tune

    Paid 550 for kit, sold intake for 200.
    Purchased kn drop in Filter for 50 and ford tuned my car for 85, so warranty is remained for 22k and 2 more years

    just thought oem box looked better under my hood.

    So the tune and install ran me 450 in the end. 08C38B4E-6FA7-4E37-9CAC-939C2C57190A.jpeg
     
  13. ForYourOwnGood

    ForYourOwnGood Well-Known Member

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    There is NO speed limiter with the FPP tune. It is removed. My 16 ecoboost with FPP 1 looked exactly like yours on a mustang dyno, it made 276/322. Fords advertisement graph is weird af don't pay any attention to it.

    Note that if you have the stock intercooler you will drop off FAST if you do a couple of pulls, it heat soaks quickly and pulls out a lot of timing. Also a mustang dyno needs the exact weight of the car to show the correct numbers, its an eddy current dyno which means it loads the drum with an electric motor to provide resistance. Dynojets use a weighted drum which is why they're easier to compare, its not as reliant on the operator inputs.
     
  14. OP
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    FreePenguin

    FreePenguin Well-Known Member

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    The dyno charts for my car at 117-118 completely falls down, literally almost straight drop.

    I do believe I have a limiter, Atleast operator did too. I read the tune does and doesn’t remove limiter. I just know 120is the cap for non perf car and 145 for perf, and my lines nose dive approaching 120. Like literally almost a hard cut

    it either my car has no power after or it got cut

    yeah, his mustang dyno it took my car, did all the weight resistance etc. it shows on the charts bottom right. The mustang manufacture had the inputs and everything for my car.

    quite amazing really.
     
  15. OP
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    FreePenguin

    FreePenguin Well-Known Member

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