A/C cooled air charge, has it been tried?

Discussion in 'Diesel Engines' started by CDK, May 26, 2012.

  1. mydauphin
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    mydauphin Senior Member

    Par, two 1000 cfm carbs :) nice. But your either over carburate or producing a lot of HP. YOU'Re also producing a lot of pollution and consuming gas like 1969.
     
  2. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    2,300 CFM, being stuffed into a blown, 512 CID Chevy, never did a "machine pull" on it it, but in the 1,700 HP range. Not a very unusual setup, just big.
     
  3. dinoa
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    dinoa Senior Member


    SAAB used water injection on some of its blown engines in the 80's

    Dino
     
  4. WestVanHan
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    WestVanHan Not a Senior Member

    Yes...I love going out in -20 weather and winding out any turbo car...huge difference


    I have 6 SPGs, 3 900Ts,a couple 9000 Aeros,and a couple 9000Ts and not one of them has water injection...all turbocharged.

    The "blown" (meaning supercharged) SAABs with injection-are they racing cars?
     
  5. powerabout
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    powerabout Senior Member

    do the sums on temp rise and volume and you will see you need a power source as big as the one you are powering to cool the air
     
  6. MechaNik
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    MechaNik Senior Member

    This is at least true for turbo charger plus losses. Difference being one uses waste heat and the other uses hard earned shaft horsepower.
    I can't see how this could ever be any different from just putting a bigger turbo on?
    Net result more oxygen available in cylinder, less response from the engine due to parasitic loads.
     
  7. Frosty

    Frosty Previous Member

    Might be better to turbo the turbo, this can be as many as 3 turbos in tandem.

    Its possible to reach 125 psi intake but watch your bottom end.

    Ive seen many attempts at multiple turbos but always split,-- like one turbo for the front and one for the back.

    There is other probs too like holding 125 psi in the inlet manifold and pipes etc.

    But I dont think you will be going that high.

    You could also consider water injection, plenty of that on a boat and I dont mean salt.
     
  8. pistnbroke
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    pistnbroke I try

    Think on everybody engines do not run on air cool or not . If you put more air into the cylinder by cooling or compressing you will get no more power unless you add more fuel.


    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    Never listen to old people .
    When they die they take the knowledge with them and you live in ignorance.
     
  9. powerabout
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    powerabout Senior Member

    Compound turbo set ups have been around for a while
    Cummins had a genset with them in the 80's
    BMW have cars them today
     
  10. CDK
    Joined: Aug 2007
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    CDK retired engineer

    As far as I know the only water injected production car was the 1th generation Studebaker Avanti with 12.5:1 compression and a Paxton compressor.
     
  11. powerabout
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    powerabout Senior Member

    When Ford /Mazda were playing around with the 4 cyl turbos for production cars in the 80's they did long term testing like they do and they found damage from the steamcleaning effect to bores and rings thats why no manufacturer will play with it.
     
  12. Frosty

    Frosty Previous Member

    Then in that case a little too much water perhaps --its only to make the air heavy.

    Im not an aircraft man but some planes have it and cant take off without it.

    Water injection often conjures the wrong Idea,--shall we say humid air like what you get when its raining.

    Ever wondered why the car goes so well at night in the rain. Atmospheric raises to 15 and the air is humid.
     
  13. powerabout
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    powerabout Senior Member

    humid air is less dense than dry air...hard to believe ask any sailor or yacht/rig/ sail designer
    colder air is more dense so more oxygen per unit volume

    PS the water injection is just to help stop detonation in other words to cover up another problem
     
  14. pistnbroke
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    pistnbroke I try

    Spitfire used water injection on the Merlin engine in the late 30s/40s Thats 1930 and a spitfire is an areoplane for you young kids .....
     

  15. rasorinc
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    rasorinc Senior Member

    A Great Airplane.....................................................
     
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