New to the challenger realm looking for general hp ratings

Discussion in 'Challenger R/T Engine and Performance Modifcations' started by Wickdgtr, Jul 4, 2018.

  1. Wickdgtr

    Wickdgtr Member

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    Hey there all. I recently purchased a gorgeous 09 Challenger. It has the 5.7 along with a magnuson supercharger, long tube headers, flow masters, 3" exhaust with the cats taken out. Any rough guestimates on how power numbers?
     
  2. 70-426_10-SRT

    70-426_10-SRT Full Access Member

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    DINO

    Dude, I have traction problems with a stock 6.1

    What you doing for tires?
     
  3. Wickdgtr

    Wickdgtr Member

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    I have Pirrelli Pzeros 245-45-20s on all 4. Like your saying traction is gonna be an issue even with traction control on when I put my foot into it. I was thinking going to like an ET Street drag radial. But so far fairly happy with the pzeros. The 6.1 has to be just a beast tho. Im estimating mine to be about around the hp your getting. My next tire purchase was looking at like a 245-35 on the rear to see how that works out.
     
  4. 70-426_10-SRT

    70-426_10-SRT Full Access Member

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    Check out SRT-Tom’s post of his new 275/40/20
    Think that I is where I am going.

    Think 245/35’s are going to be to short.
    My SRT came with 255/45/20’s on the rear and I still have to be carful in 2nd
     
  5. Diehard

    Diehard Full Access Member

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    My questimate would be about 480 HP with 6 lb boost.
    Drag radials if you plan on getting traction.:D
     
  6. Wickdgtr

    Wickdgtr Member

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    Kool. I will look into that size. The other day I was kinda looking at some MT drag radials 295-31 but wasnt sure if that would throw speedometer or be tall gearing for the auto tranny.
     
  7. Wickdgtr

    Wickdgtr Member

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    Thank you for your guestimate man. I was thinking somewhere in that ball park.
    Another question for you if you dont mind. The supercharger has a 3" diam. pulley on it. Do you think I could squeeze out more power with a smaller pulley such as like 2.8?
     
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  8. 10DYRT

    10DYRT Full Access Member

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    I'm going to say about closer to 450 Hp. as the 2009 did not come with the Eagle heads.
    Mine is at 472 RWHP with the Eagle heads and another guy here has an 09 tuned by the same shop is at 450.
    That is with about 4.5lbs of boost.
     
    Last edited: Jul 5, 2018
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  9. 10DYRT

    10DYRT Full Access Member

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    If I remember correctly the 2010 5.7 was rated at 372 hp and the 6.1 was 405 hp or 425 hp.
    These were the numbers that Dodge had listed hp at the crank not the rear wheels
     
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  10. Shaggy

    Shaggy Administrator Staff Member

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    Welcome to the forum! If you haven't yet, post up some pics of your Challenger.
     

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