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turbocharging a 4 litre

Discussion in '2nd Gen. Tacomas (2005-2015)' started by commtrd, Jun 19, 2010.

  1. Jun 23, 2010 at 6:37 PM
    #21
    cummins6speed

    cummins6speed Well-Known Member

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    14,000ºF huh?
     
  2. Jun 23, 2010 at 7:08 PM
    #22
    df4iguy

    df4iguy Well-Known Member

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    Why rear mount there is plenty of room just behind the motor. that or put it up by the airbox. There would just have to be some crazy header work.
     
  3. Jun 23, 2010 at 7:17 PM
    #23
    dually

    dually Low and slow

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    Because building a "correct" manifold is costly and a pain in the ass.
     
  4. Jun 23, 2010 at 7:37 PM
    #24
    tacobox

    tacobox Evasive Maneuvers PMKMS

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    With our 4.0L you could run a pair of 3076 turbos (kinda small) and have crazy low end torq and have the potential to make 550whp + haha. Just a question if the engine, trans and diffs would hold together which I'm guessing... not.
    If you had 14,000* EGT's your truck would melt down to puddle of liquid metal :rofl: In non diesel turbo applications, you shouldn't be seeing more then 1,500*-1600* temps
     
  5. Jun 23, 2010 at 7:45 PM
    #25
    df4iguy

    df4iguy Well-Known Member

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    Twin 30R's would make over 600whp on pump gas (depending on our cams)....thats a little much lol
     
  6. Jun 23, 2010 at 7:53 PM
    #26
    dually

    dually Low and slow

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    Doubt the rods and pistons would hold for 500 wheel...
     
  7. Jun 23, 2010 at 7:54 PM
    #27
    tacobox

    tacobox Evasive Maneuvers PMKMS

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    HAHA right I was being conservative with the HP figures, but the point was a 4.0L would be plenty to spool a pair of pretty big turbos and have lots of usable TQ down low. Well before the rest of the engine and drivetrain exploded haha
     
  8. Jun 23, 2010 at 7:57 PM
    #28
    df4iguy

    df4iguy Well-Known Member

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    yeah but it would be a one tire fire for me lol
     
  9. Jun 23, 2010 at 8:09 PM
    #29
    ktmrider

    ktmrider Senior Member

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    :popcorn: :sitting at home with my supercharger thinking:
     
  10. Jun 23, 2010 at 8:15 PM
    #30
    cummins6speed

    cummins6speed Well-Known Member

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    And remote mount turbos are lame. Turbos are driven off of exhaust energy. It has the most energy right as it comes out of the engine. Add 5+ feet of tubing and put it under the truck and it cools off and you lose a lot of that energy to drive that turbo. Not to mention the 5+ feet of cold piping that will probably increase the time it takes to spool the thing
     
  11. Jun 24, 2010 at 4:34 AM
    #31
    buddywh1

    buddywh1 Well-Known Member

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    I think the key difference is a turbo, being exhaust driven, has turbo lag and poorly designed installations (read: aftermarket bolt-ons) result in poor drive-ability.

    VW is leading the market in using small turbo's to provide good boost on small displacement motors without killing drive-ability, but that takes front-end engineering. I imagine this big 4 litre would need a twin-turbo arrangement to provide boost and maintain drive-ability. Really difficult and expensive.

    Superchargers, being belt driven straight from the crank, give boost at low RPM's, coming on smoothly and predictably. For a truck, boosting low-end torque has to be a major advantage!

    http://www.faketurbo.com/ :rolleyes:
     
  12. Jun 24, 2010 at 9:09 AM
    #32
    thinkingman

    thinkingman Well-Known Member

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    Beat me to it
     
  13. Jun 24, 2010 at 9:10 AM
    #33
    thinkingman

    thinkingman Well-Known Member

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    Foglights are for fog, not oncoming traffic!
    Beat me to it again...heat management is the challenge here.
     
  14. Jun 24, 2010 at 10:18 AM
    #34
    Mandy3206

    Mandy3206 Well-Known Member

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    Got 2 words for turbos ........Lag Time..........

    Superchargers are way better for low end applications.

    On a side note, turbos are great for diesel engines..........
     
  15. Jun 24, 2010 at 10:59 AM
    #35
    thinkingman

    thinkingman Well-Known Member

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    Foglights are for fog, not oncoming traffic!
    Turbos are pretty solid for torque applications.
    VW is a good example.
    Flat torque even for a small displacement 1.8 liter is really a good use for a small, low-pressure turbo.
    Careful engine management and aftercooling design from the start mean great torque at low revs, and dense intake charge.
    VW is putting out some of the best engineering in the industry.
     
  16. Jun 24, 2010 at 11:31 AM
    #36
    Trapper6speed

    Trapper6speed Hacksaw engineer

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    Just a good example, do some research on the GMC Typhoons and Syclones, They didn't handle worth a flip, but a good running stock one could really be a great sleeper on the track or street.
     
  17. Jun 24, 2010 at 8:13 PM
    #37
    dually

    dually Low and slow

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    Yeah.. thats why 1000+hp rearmount cars exist..
     
  18. Jun 25, 2010 at 2:39 PM
    #38
    Trapper6speed

    Trapper6speed Hacksaw engineer

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    Its all in the size of the fins in the turbo or super charger, I remeber VW built a supercharged car, it was a turd.
     
  19. Jun 25, 2010 at 3:01 PM
    #39
    jspadaro

    jspadaro Well-Known Member

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    x2 My understanding: superchargers are belt-driven, where turbochargers are based on a turbine in your exhaust. They both blow more air into the engine, but turbochargers should cause less parasitic loss.

    However, powering it from the exhaust means you don't get a lot of airflow until you get a lot of exhaust... meaning that turbos give you a bunch of power at the top end. Superchargers, being beltdriven, should kick in a bit more uniformally.

    My limited understanding, I'm no pro. :cool:
     
  20. Jun 25, 2010 at 3:51 PM
    #40
    thinkingman

    thinkingman Well-Known Member

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    Foglights are for fog, not oncoming traffic!
    impressive amount of mis-information going in this thread.
     

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