Thoughts on my build

Discussion in 'SRT Hellcat Builds' started by He11ion, Sep 4, 2016.

  1. He11ion

    He11ion Senior Hellcat Member

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    So stock we made 621/575 on a dyno jet.
    Here is a list of mods done.

    ATI 10% overdriven crank pulley with pinning kit.
    Metco 3.10 upper pulley.
    Metco idler pulleys.
    BWoody anti-slip idler with a Metco pulley.
    Ported blower snout.
    Ported 95mm Throttle body.
    JBA cat delete with Vibrant Performance mufflers (Resonators) This really helped to keep it sounding stock.
    Brisk spark plugs (ER12S)
    K&N Air filter.
    160* thermostat.
    309 rear gears.
    Aluminum drive shaft.
    Custom tune by Crucial Performance in Columbus Ohio.
    Tires ET Street SS P305/35R20 on stock rims.

    **UPDATE** as of 9/24/16
    The car made 773/735 on the same dyno jet.
    The boost has increased 5lbs with the pulley combo. We are at 15lbs now.
     
    Last edited: Sep 24, 2016
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  2. shadowsk

    shadowsk Silver Member

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    My mods are:
    10% lower pulley (Stock upper)
    Metco idlers
    180 Thermostat
    309 gears
    DSS AL DS
    DSS Axles
    20" Nitto NT05R and 18" Mickey ET Streets (havnt run the MT's yet)

    Mine made 717/631 on a Dyno Jet in Charleston SC 100 deg/47 humidity. I'm only getting 2.5 more boost with mine but I'm happy where I'm at. Demon suggested I just do the lower since I wanted to stay with the kushy OEM drive. We didn't do a baseline because of time constraints (I was out of town on a schedule) and Demon Performance's dyno guy is an hour away from their shop.

    717_DYNO.jpg
     
    Last edited: Sep 4, 2016
  3. MABBRYFL30

    MABBRYFL30 NYS President Hellcat Car Club Gold Supporting Member

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    How much did this set up cost you?
     
  4. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    I agree it appears your 50 horsepower short for that setup.
    I see you did an email tune, that could be the difference there's no substitute for a custom Dyno tune. There's no mistaking HHP's reputation but no two cars are the same. When you do an email tune you're getting a generic tune, when you do a Dyno tune you're getting one that will get the most out of your car.
     
    Last edited: Sep 4, 2016
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  5. Bstudey01

    Bstudey01 Gold Member

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    1st tune from hhp will always be on the safe side for fueling and timing. Get some logs and send em to Josh for a revision.
     
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  6. Bstudey01

    Bstudey01 Gold Member

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    Btw again for safety he will not get very aggressive with timing on pump gas.
     
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  7. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    Why waste all that time and money sending tunes back and forth through email? Just go find a reputable Dyno shop and get one dialed in for your car.
     
  8. Bstudey01

    Bstudey01 Gold Member

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    Doesn't cost anything extra for a revision on the tune from hhp to dial it in. Just log a pull up to redline and log it with the trinity and email to them. Usually he will have it nailed down by 2nd or 3rd revision. Personally I would never let just any tuner touch my car. Imo thats asking for trouble. They are some horror stories from other tuners. Hhp has a bunch of cars dialed into the 9s and Josh really knows this platform well.
     
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  9. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    I paid just over $5000 for:
    10% underdrive pulley to include pinned crank
    American Racing long tube headers
    Custom Dyno tune
    740 RWHP
     
    Last edited: Sep 5, 2016
  10. He11ion

    He11ion Senior Hellcat Member

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    So in all fairness I will see what Josh at HHP comes back with for a 2nd and 3rd tune if needed. I already sent him my log files we saved from the dyno and Trinity. The shop here in Columbus that I use has done a 2015 Charger and with meth injection on 16 lbs of boost made 780 whp. We compared the tune files on what Josh did in my car v's what my tuner did in the other charger and they are very close with the exception of timing the other car has a ton more timing through the whole pull. Josh doesn't have much timing in the lower RPM's at all. Josh has all my fuel tables stock but with this ECU and 02 sensors they can compensate for the needed fuel.

    To answer another guys question I have 8K in everything in my build list including the labor to install everything.
     
  11. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    Real good investment. I can't wait to see your final numbers when they get it all dialed in, good luck.
     
  12. Racist Cat

    Racist Cat Gold Member

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    Meth injection needs to run even less timing as the meth advances timing! Playing with fire on that one IMHO.

    Timing on timing is never good. That's like a nos tune, and the timing is advanced.

    I don't know a whole lot of things about gassers, but meth + advanced timing is asking for trouble.
     
  13. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    When you guys are saying "meth injection" are you referring to water-methanol injection or just straight meth?
     
  14. Racist Cat

    Racist Cat Gold Member

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    I'd think it's a 50/50 mix. I don't know what is actually happening.
     
  15. He11ion

    He11ion Senior Hellcat Member

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    Well Meth injection is really a band aid to achieve more timing in the motor. For an example you may only run 15* of timing WOT on 93 octane fuel without any knock, but when you add meth you can run 21* of timing at WOT without knock as this increases the octane to roughly 105 to 110. Another thing Meth does is decrease the AIT. So 6* will add a good bit of hp. The problem comes when something happens to your meth injection as you will now have to much timing for just 93 octane. I hope this clears this up for some. That is why a lot of people will switch to E85 as that equates to roughly 104 octane.
     
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