500hp is down!!!

Discussion in 'F/I Mods & Tuning' started by rexrunner, Sep 24, 2009.

  1. CaliKnightRider

    CaliKnightRider New Member

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    what im saying is that maybe he gets by with 440's bc he has a good fuel flow and a turbo wont burn as much fuel to make 400-450 rwhp than a s/c would burn to make 400-450 rwhp. because the turbo has virtually no parasitic loss. i see what ur saying but i like making theories. they are fun:crinklehair:
     
  2. ntinhri

    ntinhri Active Member

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    I think dyno was on incorrect setting.......... here we go again...

    However you will love your new clutch!

    500 hp or not something to watch, hp doesnt always mean fastest...

    the little probe that could... all over a corbra..
    http://www.youtube.com/watch?v=WKLfXncIvnM
     
  3. 5H4D0WD347H

    5H4D0WD347H New Member

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    Yes but the HP produced is still the same (in very general terms at least for the purpose of this conversation).

    if you have 400 at the crank you may see 360 at the wheel with a turbo and 330 at the wheel with the supercharger (all things being equalized for the sake of going on forever).

    The power is still produced but gets hidden amongst the higher parasitic loss of the supercharger.

    Regardless you still need to feed those 400 ponies (they get hungry).
     
  4. CaliKnightRider

    CaliKnightRider New Member

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    yes but see now u proved my point. maybe thats how gets gets away putting down higher numbers on a dyno with smaller injectors. the turbo is more efficient so it doesnt burn as much fuel and is easier for a turbo to make those bigger power numbers. if u thin what it takes to get a s/c to 422 rwhp. well he did the same thing but is a turbo, custom intake, full exhaust, tubular manifolds, injectors, fuel pump, its like if he had a s/c with every mod in the book but instead he rolling with a turbo that pushes more cfm and is more efficient. so why is it so far fetched that he can be putting down big numbers. sorry for adding this long post. but its a forum, enjoy the read lol
     
  5. 5H4D0WD347H

    5H4D0WD347H New Member

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    Ryan. :banghead:
     
  6. CaliKnightRider

    CaliKnightRider New Member

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    deathshadow<Caliknightrider lol:smile:
     
  7. 5H4D0WD347H

    5H4D0WD347H New Member

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    With all things being equalized.

    If you have 350 cfm from a supercharger, and 350 cfm from a turbo.

    Crank HP from both is 400 HP.

    how much fuel is needed for both setups?
     
  8. CaliKnightRider

    CaliKnightRider New Member

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    how would crak hp be equal if the parasitic loss would be at the crank from having to spin the pulley?????
     
  9. 5H4D0WD347H

    5H4D0WD347H New Member

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    the loss is after we have fueled the mass of air ingested.
     
  10. Grumpy

    Grumpy New Member

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    Please correct me if I'm wrong. All things being equal, turbo get less tax (parasitic lose) than supercharger. Hence turbo being more efficient. So it would take less fuel to put down xxx HP to the ground for turbo-equiped vehicle that supercharger-equip vehicle.


    Back on topic. Get that clutch in and make some dyno/stripe video.:top:
     
  11. CaliKnightRider

    CaliKnightRider New Member

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    hmmmm..... ill have to think this one a little longer before i have a rebuttle
     
  12. 5H4D0WD347H

    5H4D0WD347H New Member

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    How do you create more crank HP with the same volume of air with a turbo over a supercharger is what im asking you.
     
  13. CaliKnightRider

    CaliKnightRider New Member

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    bc the s/c engine has to spin a pulley and a shaft to keep the air coming in making the engine work harder. so in theory making a percentage less hp
     
  14. 5H4D0WD347H

    5H4D0WD347H New Member

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    Ok so it uses the power produced less efficiently we have established that.

    But how does that affect the fuel consumption for the same volume of air whether it comes from a turbo or a supercharger?
     
  15. DC29

    DC29 New Member

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    heat is another effiecnt adavntage over a sc, its not sitting directly on top of a hot motor which brings the housing temps down, (cooler air= more power), and the air entering doesnt have to get compressed by the hot rotors in a sc which makes intake temps lower..
     
  16. trd_sport

    trd_sport Active Member

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    its all because smurfs are blue and not green........ think about it.
     
  17. 5H4D0WD347H

    5H4D0WD347H New Member

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    That is irrelevant to this conversation as there are way too many variables when you start negating differences as these (such as specific compressor efficiencies, ambient conditions, and intercooler efficiencies.

    Once you start boosting that air moves through the system very quickly and stagnant air is quickly gone.

    Lets keep all external variables equalized for the sake of sanity and the basic principal behind this conversation.

    Back to the premise:

    Assuming the same AFR, you will need X amount of air to make enough combustion pressure to make 500hp at the crank, regardless of how its made, or how much makes it to the wheels.

    500 crank HP is 500 HP crank HP and requires the same fueling turbo or supercharger, how efficiently its used is a different conversation.

    Fuel demand for 500 HP is the same given equal AFRs and air mass.

    The computer does not care if its a turbo or a supercharger.
     
  18. Grey Ghost

    Grey Ghost New Member

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    Im with DeathShadow
     
  19. Super Werty

    Super Werty Active Member

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    I still have to say that isnt enough fuel for that power


    A good way to find out if you've really got that much power is to take it to the track. If you dont trap over 110mph then I would bet its safe to say your dyno operator is full of bean dip.
     
  20. off-road taco06

    off-road taco06 New Member

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    So your saying a centrifugal S/C sits on top of the motor? Hmmm... i guess the shop installed mine wrong then... no wonder im having all these problems! :stupid:

    EDIT: How about we just wait for the dyno. instead of speculating all day which eventually turns into chaos. or how about someone goes with him when he dyno's.. lol.

    Either way, GET IT DONE, SON!
     

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