HP without supercharger

Discussion in 'Dodge Challenger SRT Hellcat' started by Slowpoke387, May 2, 2016.

  1. Slowpoke387

    Slowpoke387 Gold Member

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    So i roll up with the new cat Friday and start answering questions from curious people who want to know all the juicy details, and someone asks me how much power the supercharger actually adds. But in a way that made me curious. They asked how much power would the 6.2 have with no supercharger. I seemed to have never come across this before and now im curious too.
     
  2. bighit2883

    bighit2883 Gold Member

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    Well the 6.4 pushes 485 hp. So the 6.2 id say would be 475 meaning the blower adds an additional 232 hp
     
  3. TNCHARGER

    TNCHARGER SRT Hellcat Supporter Gold Supporting Member

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    The 6.2 was designed for a blower (lower CR, cam, etc) so I would bet the HP would be closer to 400 or less...if the 6.2 was built for N/A probably close to the 6.4...
     
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  4. Heavy Metal

    Heavy Metal Silver Member

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    Are there superchargers available for the 6.4? If so, where?
     
  5. Toolman_42

    Toolman_42 Gold Member

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    So if it takes 80 HP to run the blower, what is the base and how much does the supercharger add up and above that to produce 707 HP at the shaft?
     
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  6. Slowpoke387

    Slowpoke387 Gold Member

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    My question was basically if you were to remove the supercharger, what would the 6.2 make for power?
     
  7. DShatzer

    DShatzer Gold Member

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    Arrington, Kenne-Belle, Procharger, many folks make superchargers for the 6.4. Tread carefully supercharging the 6.4. There is a reason Chrysler did not just supercharge the 6.4...........
     
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  8. Slowpoke387

    Slowpoke387 Gold Member

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    Yep, saw a few vids comparing the internals. 6.2 is beefed up quite a bit internally to accomodate the extra power. Not to mention the cooling issues you would run into. I'd never do this.
     
  9. BODUKE

    BODUKE Gold Member

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    You would have a 12 second car.
     
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  10. usmc341

    usmc341 Gold Member

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    Using the 392 as comparison slight decrease in stroke and compression ratio plus a slightly milder cam I'm thinking about 440-450 crank HP.

    From a good article I came across:

    "Assuming an engine with a compression ratio of around 9:1 running pump gas,if a supercharger gives your engine 14.7 psi of boost (another atmosphere) that will essentially double the output of your engine, everything else being equal. After adjusting for thermal and mechanical energy transfer, if an efficient centrifugal supercharger is generating 7.5 psi (approx. 1/2 an atmosphere), you will see around a 35-40% gain in horsepower and torque at your non-supercharged maximum horsepower rpm."
     
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  11. Slowpoke387

    Slowpoke387 Gold Member

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    Ok so that second paragraph - i dont see any wiki posts on how to translate that into English...
     
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  12. DShatzer

    DShatzer Gold Member

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    Funny, but true.
     
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  13. usmc341

    usmc341 Gold Member

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    Not wiki but it's pretty self explanatory. In thoery 14.7 psi will basically double your hp output. Just giving you a frame of reference.
     
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  14. DShatzer

    DShatzer Gold Member

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    Basically USMC341 said the supercharger doubles the horsepower of a properly designed, efficient supercharger system. Simply put, divide 707 by 2 to reverse the doubling effect of the supercharger, and that gives you 353.5 "advertised" horsepower. More details...Reversing the post from USMC341, if the properly designed supercharger adds 100 percent extra horsepower (doubling), removing the supercharger, intake and replacing with a fuel injection intake would probably net you 350-400 horsepower, with all the other factors remaining the same. (Same cam, compression ratio, exhaust manifolds, etcetera). Hope this helps. Oh yes, because it has a different cam, it would be on the lower side of horsepower.
     
    Last edited: May 2, 2016
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  15. DShatzer

    DShatzer Gold Member

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    I agree, the concept is simple. The halving of double can get confusing, I guess.....
     
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