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2.3 TVs 79mm pulley low power

Discussion in 'Engine/Tuning' started by Craig14, Aug 9, 2018.

  1. Craig14

    Craig14 New Member

    Messages:
    2
    Joined:
    Aug 25, 2016
    Location:
    Montana
    Late 14 5.0 (passenger head is a 15, 3 bolt water pump) Roush 2.3 TVs, 79mm pulley, Roush cai, cat delete, upgraded clutch back. Tuned by reputable runner, only making 485 rwhp. Blower was installed by ford and tunned originally by roush (575 package). Runs 116 in the 1/4 and 93 in the 1/8. Just did compression test, all cylinders checked out good. No codes thrown. Anybody have any ideas?
     
  2. hand-filer

    hand-filer Active Member Established Member

    Messages:
    917
    Joined:
    Dec 25, 2010
    Location:
    Winnipeg, MB, Canada
    Belt slippage? How many psi at full boost? Have you talked with your tuner or data logged?
    I'm running virtually the same setup other than an 82mm pulley and with cats and I'm at just over 600 Hp on 91 octane fuel. Mail order tune by JDM Engineering with one follow up tweak.
     
  3. rhite95

    rhite95 Member Established Member

    Messages:
    202
    Joined:
    Jun 27, 2012
    Location:
    Melbourne, FL
    Something isn't right.
    I would do some data logs and talk with your tuner.

    My stock 14 Roush RS3 A6 went 12.50 @115, did VMP mail order tune and 79mm pulley it went [email protected]
     
    Last edited: Aug 10, 2018
  4. Riddick

    Riddick MERICA Established Member

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    Oct 25, 2012
    Location:
    Haughton, LA
    Do you have a datalog you can post? What fuel are you running? What throttle body? What elevation was the car ran in?
     
  5. OX1

    OX1 Active Member Established Member

    Messages:
    108
    Joined:
    Sep 23, 2015
    Location:
    New Jersey
    My 14 auto ran 125 in good air (ATCO) with same blower, 80 mm pulley (Stg 3), closed Rousch air cleaner, VMP 93 tune and no other power mods. Almost sounds like the tune is not that much different than what Rousch supplies stock (which is a super conservative tune).........
     
  6. KG145.0

    KG145.0 Member Established Member

    Messages:
    129
    Joined:
    Nov 27, 2013
    Location:
    Arizona
    Like other have said, datalog and send to your tuner.. Something that is a factor is elevation...I notice your in montana...not sure where but if your at high elevation, thinner air less boost=less power. I noticed it when I moved from sea level to an area of around 3000ft.. I lost about 1.5-2 lbs of boost, probably around 40 Hp. I went two steps smaller pulley to compansate.. Maybe something to look at
     

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