dealer installed roush supercharger

Discussion in 'Mustang S550 General Forums' started by okitsme, Aug 27, 2019.

  1. okitsme

    okitsme Member

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    Last week I bought a brand new 2019 Mustang GT with a Roush supercharger installed by the dealer. Today I took it to a shop and put it on a dyno, and it only put out 380hp and 335lb/ft torque at the wheel on a Land and Sea dyno. The dealer told me there is a "break in period" programmed into the computer, so the car will not output full power until after 1500 miles. Has anyone bought a similar mustang before and experienced the same thing?
     
  2. kluke15

    kluke15 Well-Known Member

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    those arent even stock numbers...sounds fishy to me but i have 0 experience with FI
     
  3. robwlf

    robwlf Well-Known Member

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    i would assume they would be correct there not gunna just let ya rip it right off the floor with a new motor.. like you just tried to do.. my car had miles on it when the s/c was put on so i didn't have that problem.. but my buddy bought a new 19 scat pack daytona charger and his was limited till 1200 miles

    and also id check to see if they had the dyno brake on too high.. i've had this happen to me a few times taking my car to a dyno the guy didn't adjust the brake or whatever its called and it put out crappy numbers.. till he realized it

    and roush is all about safe so i wouldn't doubt there's a safe mod till 1500
     
  4. RugbyRef

    RugbyRef Well-Known Member

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    I bought a brand new 2015 Roush Stage 3 right off the floor a few years back and, other than the normal break-in period for the car/motor itself, I was not informed of a specific period of time to break-in the SC. To be sure, I contacted Roush Performance and the technician explained to me, that although there was no official break-in period for the SC, to follow the Ford break-in period just to be on the safe side. As far as the numbers you saw on the dyno, Kenny is right...the numbers sound very suspect. Perhaps Rob is right and there was an issue with the dyno itself?
     
  5. IceAge

    IceAge Well-Known Member

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    The SC Corvettes I believe have the same technology of not unlocking full power till x amount of miles as well. Just call Roush directly and they will tell you the real story and congrats she’s gonna fly when she’s a legal.
     
  6. hossman

    hossman Well-Known Member

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    At worst case scenario you should be upper 500’s to low 600’s
     
  7. Gplus

    Gplus Member

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    You should be at least at 600plus. The Roush program releases 2psi of boost after 1000 miles but the numbers you are showing aren’t even consistent with a stock coyote.
     
  8. IronG

    IronG Well-Known Member

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    Can you share a pic of the your engine bay?
     
  9. Bikeman315

    Bikeman315 Well-Known Member

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    How many miles did you have when you put it on the Dyno?
     
  10. DuRsT

    DuRsT Well-Known Member

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    I'm not sure how the tune would pull power until a certain mileage.

    When it was on the dyno, what rpm was it run to?
     
  11. Gplus

    Gplus Member

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    2E7F59A2-B2A0-418E-9AE5-E6109217347B.jpeg 5E6AB6D5-5CEB-4CA2-A7F5-CBD199B048CA.jpeg 2DC663D6-B4A4-4262-9929-5F9B422523AA.jpeg
     
  12. OP
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    okitsme

    okitsme Member

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    Thanks for all the feedback! So I decided to call Roush instead of the dealer, and they informed me of a connector that needs to be disconnected in the engine bay behind the airbox. It disables traction control completely. I'm going to try to find some time to dyno it again today and see if that was in fact the problem. Roush also confirmed there is no computerized break in period.
     
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  13. OP
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    okitsme

    okitsme Member

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    20190827_094639.jpg 20190827_094651.jpg 20190827_094702.jpg
     
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  14. Bikeman315

    Bikeman315 Well-Known Member

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    A word to the wise, check with your mod manufacturers before throwing your car on a dyno. Better safe than sorry.
     
  15. Bluelightning

    Bluelightning Bluelightning

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    Yeah, you've got to turn off the advancetrac and traction control by pulling that plug on the dyno or traction control will go nuts as it thinks you are just spinning the wheels.
     
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