Hellcat Engine vs. Trinity Engine

Discussion in 'SRT Hellcat General Discussions' started by Blackdevil77, Feb 8, 2015.

  1. Blackdevil77

    Blackdevil77 Silver Member

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    This thread has nothing to do with the GT500 or the Challenger/Charger, I simply, for conversation and entertainment purposes, want to compare these two monstrous engines. I'd like to hear from those of you who really know your stuff about engines. I can read the article and while I do understand a lot of stuff, I know that most of you out there know far more than I do about engines, engine parts etc.

    So here are the two articles I read, the first on the Trinity Engine, and the second on the hellcat engine.

    2013 Ford Shelby GT500 Trinity 5.8L V8 - Power Of Three - 5.0 Mustang Super Fords Magazine

    And here's the hellcat engine article

    We Take A Hard Look At Dodge s Paradigm-Shifting 707hp Hellcat Hemi

    The notable few things I was able to gather from this with my limited engine knowledge is, the Hellcat has a more efficient, all around "better" supercharger." The combustion chamber pressure on the Trinity engine is higher at around 2,000psi, while the Hellcat see's pressures just under 1,600 psi at max load. But the pistons in the Hellcat engine can withstand up to 22,000 psi??? Am I reading that wrong, that seems way off to me. The Hellcat engine has a higher compression ratio. Seems the Trinity engine also has an electric pump to pump coolant through the intercoolers, but it doesn't specify how much, whereas they say the Hellcat can pump 12 gallons of coolant through the intercoolers every minute.

    For those of you that know better, how would you compare these engines? Which engine do you believe is "better" built? Which do you think can withstand the most power the longest? Are there things about one that is clearly better than the other? I'd like to hear your honest thoughts and if possible, without a Hellcat bias :)
     
  2. bolivarshagnasty

    bolivarshagnasty Gold Member

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    Good luck finding an unbiased soul on this forum.:)
     
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  3. JBS$

    JBS$ Silver Member

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    Having owned one, I will tell you this first hand. They are first class bad-assed and 400 pounds lighter. If you are going to jump on one, take your "a" game or don't go.
     
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  4. X-Men Fiend

    X-Men Fiend Gold Member

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    The Hellcat engine kicks it's pure-untamed-ass, oh wait, you said UN-biased, ~my bad!
     
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  5. Blackdevil77

    Blackdevil77 Silver Member

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    I actually currently own a 2014 GT500 that I'm strongly considering trading for a Charger Hellcat :D
     
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  6. B5 Blue

    B5 Blue Platinum Member

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    I now see I need the Evelynn Wood speed reading course because it took me 10 minutes to read the first 2 pages on the 5.8 and I need a break
     
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  7. rayzazoo

    rayzazoo DRIVESRT.COM Gold Supporting Member

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    To help facilitate the discussion:

    Trinity (Mustang) / Hellcat (Challenger)
    5.8L (355 cu-in) / 6.2L (370 cu-in)
    662hp @ 6,250rpm; 631tq @ 4,000rpm / 707 @ 6,000rpm; 650tq @ 4,000rpm
    all-aluminum / cast iron block; aluminum heads
    Dual Over Head Cam / Single Over Head Cam
    4 valves per cylinder / 2 valves per cylinder
    14psi boost / 11.6 psi boost
    no variable cam timing / variable cam timing
    6,250 (7,000 overrev) rpm / 6,200prm
    5w-50 full synthetic / 0w-40 full synthetic
    2.3L TVS Eaton blower / 2.4L IHI twin-screw blower
    54.8lb injectors / 57lb injectors
    9.0:1 comp ratio / 9.5:1 comp ratio
    3.68 x 4.165 bore-stroke (long stroke) / 4.09 x 3.58 bore-stroke (short stroke)


    6.2L Raptor engine can't fit in the Mustang.
     
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  8. hellcat1

    hellcat1 Gold Member

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    I thought the gt500 made 15 pounds of boost
     
  9. Blackdevil77

    Blackdevil77 Silver Member

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    Some say 15, some say 14. I usually see about 14 on my bone stock car. I bet in cooler weather when the air is more dense, it would probably see 15 pounds.
     
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  10. hellcat1

    hellcat1 Gold Member

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    Can you imagine what the hellcat would do with 15 pounds of boost..insane
     
  11. Blackdevil77

    Blackdevil77 Silver Member

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    That would make crazy power. On top of that, it has a better supercharger that won't be near the end of it's efficiency range with 15 pounds. Only thing you'd have to worry about are maybe the rods or something holding up to that much power. You be around 800 horsepower, probably.
     
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  12. Zebug

    Zebug Gold Member

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    going to stop the discussion right here....bigger is ALWAYS better with everything in the history of the universe.
     
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  13. Blackdevil77

    Blackdevil77 Silver Member

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    I made the same thread over on another forum of GT500 owners, and the responses are very interesting, I think. Am I allowed to post a link here to read for your reading entertainment?
     
  14. FreightTrain

    FreightTrain Comfortably Numb

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    I think the hellcats engine is better built but im biased too
     
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  15. Blackdevil77

    Blackdevil77 Silver Member

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    From what I gathered from researching and from what others have been saying on the other site I'm waiting for permission to post the link to, they are both monsters. The Hellcat has a more efficient supercharger with better cooling, all while running less boost so the Hellcat should be more consistent and much less prone to heat soak. Both engines use powdered metal rods, which is the weak link in the Trinity engine and will likely be the weak link in the Hellcat engine as well. Only difference is because the Hellcat engine doesn't rev as high, and the stroke is less on the Hellcat engine, the Hellcat rods should be able to support a little more power than the Trinity engine, as long as the rev limiter isn't raised to high. The max recommended power on the Trinity with stock internationals is about 750rwhp. So with the Hellcat, assuming the rods are the same strength, which we simply don't know yet, I'd guess about 800rwhp should be okay, as long as the rev limit isn't raised substantially. Also, the Trinity engine should be able to run more boost because of it's lower compression ratio. While the Hellcats supercharger can run more boost more efficiently than the Trinitys roots style blower, the engine's higher compression ratio will keep you from being able to do so on pump gas.

    I'll post the link with that and more information as soon as a mod says I'm allowed to. I don't know if it breaks any rules or not.
     
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