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Explain velocity stack???

Discussion in 'The Garage' started by 85mudblazin, Sep 19, 2004.

  1. 85mudblazin

    85mudblazin 1/2 ton status

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    How does it work and what kind of performance gains is there??
    Thanks
    -Chris
     
  2. retroblazer

    retroblazer 1/2 ton status Premium Member

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    Re: Explain velocity stacked???

    A minor correction of terms. It's not velocity stacked, like pancakes or women's breasts, but velocity stack, like a smoke stack. Typical set-up is designed to allow clean, non turbulent air into a carb or fi inlet. By adusting length, they can be tuned to specific engine rpm use.
     
  3. 85mudblazin

    85mudblazin 1/2 ton status

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    Re: Explain velocity stacked???

    ow ok velocity stack, I was just watching top truck challenge and toby's blazer had it.
     
  4. 84gmcjimmy

    84gmcjimmy 1 ton status

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    Re: Explain velocity stacked???

    2003 TTC?
     
  5. 85mudblazin

    85mudblazin 1/2 ton status

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    Re: Explain velocity stacked???

    yup /forums/images/graemlins/thumb.gif
     
  6. 84gmcjimmy

    84gmcjimmy 1 ton status

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    Re: Explain velocity stacked???

    okay cool
    where does it mention velocity stack?
     
  7. K5er4Life

    K5er4Life 1/2 ton status

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    Re: Explain velocity stacked???

    Dont mean to go off topic but I just bought the TTC 2003 on saturday and I have seen it atleast 6 times already. There are some freakin crazy wicked bad trucks in there!
     
  8. RustBuket

    RustBuket 1/2 ton status

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    Re: Explain velocity stacked???

    Isn't it just a throttle body spacer designed to create more turbulence and therefore more atomization of fuel= more power? /forums/images/graemlins/smirk.gif
     
  9. 85mudblazin

    85mudblazin 1/2 ton status

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    Re: Explain velocity stacked???

    He says it when they are going over each truck and they are looking at the engine is his blazer. /forums/images/graemlins/thumb.gif
     
  10. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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  11. RustBuket

    RustBuket 1/2 ton status

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    Oh ok, I was thinking of something else. Yes, those are used to tune an engine so that at a certain RPM you will get an almost supercharger like effect. /forums/images/graemlins/cool.gif
     
  12. 85mudblazin

    85mudblazin 1/2 ton status

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    so do they work and would it be good for offroading??
     
  13. RustBuket

    RustBuket 1/2 ton status

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    They wouldn't be any good for off roading because I don't think you can run a filter if you run stacks.
    The incoming air hits the closed intake valve at a high velocity so the air "crams" into a small space and creates pressure. Then the pressure build forces the air back out again creating a vaccuum zone. The trick is to make your stack the exact length so that when the intake is opening again the air is rushing into the low pressure area creating the supercharger effect. There is a formula to determine the exact length but I have forgotten. I read it a long time ago in a Hot Rod article. /forums/images/graemlins/thumb.gif
     
  14. 85mudblazin

    85mudblazin 1/2 ton status

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    not sure about the filter but, toby had a filter atop his /forums/images/graemlins/screwy.gif
     
  15. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    really popular in the 70's if memory serves me...

    you can filter them to a certain extent.... thin foam filter that gets sandwiched between 2 screens at the top...

    had one on my 340 Duster, seemed to work pretty well...
     
  16. 85mudblazin

    85mudblazin 1/2 ton status

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    it cant really hurt anything right?? I mean for 20 bucks if it improved anything it would be worth it. /forums/images/graemlins/whistling.gif
     
  17. RustBuket

    RustBuket 1/2 ton status

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    BUT if you have to run a POS filter and then end up wearing out your engine quicker than you have to then thats no good either. /forums/images/graemlins/blush.gif
     
  18. 85mudblazin

    85mudblazin 1/2 ton status

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    yea your right I am just going to save myself a headache on this one /forums/images/graemlins/thumb.gif
    thanks for the info though
     
  19. RustBuket

    RustBuket 1/2 ton status

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    /forums/images/graemlins/thumb.gif
     
  20. Thunder

    Thunder 3/4 ton status

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    I have a Velocity stack on my TBI Blazer. I used it to get rid of the air choking POS spacer that goes between the air cleaner housing and the TB. Got more air flow. I have a lot better throttle responce.
    I cut a bigger hole out the bottom of stock air cleaner housing to fit the diamater of the stack. And riveted it to the bottom of the housing. Works great.
    Velocity stacks help to speed up the air flow at low RPMs
     

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