Hellcat throttle response & sensitivity

Discussion in 'SRT Hellcat General Discussions' started by SDCharger, Mar 11, 2015.

  1. SDCharger

    SDCharger Hellcat Member

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    I have a question for you current Hellcat drivers while I wait for mine.

    I had a Vortech supercharger on my current SRT Charger for a while. It was lots of fun, but one part of it needed improvement in my opinion. You could drive it around up to 1/2 throttle or so, and it acted like the supercharger didn't exist. And at WOT, it screamed.

    However, when rolling into the throttle, it seemed to "jump" at some point abruptly to WOT earlier than it should based on throttle pedal position. So in lower gears, 1st gear especially, rolling into it smoothly ended up being more like smooth to 40% throttle, then boom 100% power.

    I inquired to the wizards of the web at the time, and the consensus was it was due to the tuning limitations, and rather than take the chance of the engine going too lean on fuel, the tuning was designed on the safer side because they couldn't tune properly for partial throttle under boost due to the limitations of the PCM. So under boost, go to WOT.

    So how smooth is the throttle response on these cars? Are you able to "modulate" the power to exactly what you want in the lower gears? Picture being on an autocross or road course, down in 1st or 2nd gear and wanting 50% power, or 65% power to carry around a long sweeper, is the response smooth and predictable?
     
  2. tsc

    tsc SRT Hellcat Enthusiast

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    You can most certainly modulate and the power curve is completely linear, just look at any dyno graph. Almost a perfect 45 degree angle all the way up to redline. Nothing peaky at all about the power output and throttle response.

    Also throttle response varies by the drive mode you're in. ECO mode in A8 requires more throttle input and on the other end of the spectrum, track mode is extremely responsive.
     
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  3. Chippy

    Chippy Silver Member

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    Factory tune can deal with part throttle easy compared to your old hacked tuning due to Chrysler not playing nice with the aftermarket. I still try to avoid part throttle boost a lot even with factory tuning.
     
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  4. solo7777

    solo7777 SRT Terminator Hellcat Car Club Western Regional President HCC Charter Member

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    yea....track mode is very sensitive, kinda like a bucking bronco!:D
     
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  5. MoparPhil

    MoparPhil Gold Member

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    I had a Vortech on my '09 SRT8 Challenger. I know exactly what you're talking about. Mine was a stick car so I could easily wind it out at lower speeds so boost was right there waiting to happen. My Hellcat is totally different. It's all there right off idle. Like the Vortech it has good street manners until you mash it but there is no magic threshold that you cross before boost happens. It hits hard as soon as you stab the throttle.
     
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  6. SDCharger

    SDCharger Hellcat Member

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    Thanks, can't wait to get mine and try it out.
     
  7. RadCat

    RadCat Left Shark

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    Vortech vs this IHI, two totally different types of superchargers. Vortech is a centrifugal, IHI is twin-screw. Different personalities.
     
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  8. Bbreyer

    Bbreyer Rookie

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    i HAVE 3K MILES ON MY MANUAL HELLCAT. THE THROTTLE RESPONSE IS VERY LINEAR AND SMOOTH. VERY EASY TO DRIVE AROUND TOWN.
     
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  9. Aaron Vogel

    Aaron Vogel Silver Member

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    My Edelbrock was similar, below 1/2 throttle it drove like a stock 6.1, past half throttle or 3k rpms the boost would kick in. Idunno about Vortech, but the Edelbrock did it for emissions. So you could have the power when you wanted it, or the MPG. It was even adjustable on how the boost kicked in, mild, wild etc.
     
  10. huggytree

    huggytree Gold Member

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    no jumping....easy to control....put your foot 1/2 way down and you hear SC whine even at lower rpms

    it has none of the issues your worried about....its nice and smooth

    pedal is sensitive in sport/track modes
     
  11. CubeMan

    CubeMan Tri-State Overlord

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    it sounds like your vortech is working like a turbo and acting like it hit boost. I've never been a big fan of the prochargers i thought it was just the worst of both worlds (Super and turbo). Besides that the hellcat's power delivery is really smooth.
     
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  12. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    I love the throttle response. Compared to my 08 it's 100% better. :)
     
  13. CanuckH3llKat

    CanuckH3llKat Silver Member

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    You have supercharger boost right as soon as you push the throttle, its unbelieveable!!! Plus you get the supercharger whine at low speeds as well. It's awesome when you're going kinda slow past people in a low gear and the SC is whining, people are looking and wondering what it is!!! lol
     
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  14. FA5T CAT

    FA5T CAT Silver Member

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    Module aFe Power Sprint Booster Dodge Challenger 09-13 V6 V8 A T 77-12002 - aFe Power
     

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