Flowbench build. Fun project that pays dividends

Discussion in 'Mopar Performance Issues' started by pittsburghracer, Aug 9, 2018 at 8:30 PM.

  1. pittsburghracer

    pittsburghracer Well-Known Member

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    Not sure I'm putting this in the right area but if you want a fun project that will help your street and strip performance and knowledge of air flow here's a fun little Winter project. Bruce at PTS Flowbench Forum - Login sells the plans to get you going. I built the 8 motor bench so it will handle more than I will ever need. These benches once calibrated are almost unbelievable in how accurate they stay. I never totally finished mine and prettied it up but its going strong with zero maintenance after 100's of flow tests. Here are a few pictures of my build but if you are really interested sign up on the above forum and do some reading.


    37423851940_dc877682eb_k.jpg flow bench 088 by John Cadamore, on Flickr


    23828869518_127d238883_k.jpg flow bench no 2 089 by John Cadamore, on Flickr


    42147176210_9f06a14fcd_b.jpg flowbench002 by John Cadamore, on Flickr

    29017890827_2866700ca2_b.jpg flowbench3-9-10005 by John Cadamore, on Flickr
     
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    • 67Dart273

      67Dart273 Well-Known Member

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      Do you REALLY need that many motors? I used to work part time maintaining equipment for a family had several laundries here locally, and a couple of car washes. Those car wash vacuum motors are nothing short of scary. I used two of them to repair a central vac in one of the laundries. Ended up unhooking one and it STILL generated so much static electricity in the hose that it was painful!!

      Anyhow this is marvelous. I've dreamed of such, but don't know much head theory LOL
       
    • famous bob

      famous bob mopar misfit

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      interesting . I built a cheapy one just to flow intake manifolds, went belly up before I got done. Ended up at a buddies shop using his real one to finish.
       
    • pittsburghracer

      pittsburghracer Well-Known Member

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      I think it maxes out at 540-560cfm@28 inches but if I think a head has an issue instead of 28 inches of depression I can crank it up to 36 inches or so to see if it is a problem. Two motors are on a veristate to adjust depression and the others are on single switches.
       
    • 67Dart273

      67Dart273 Well-Known Member

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      Interesting, how many of them are you typically running on a head flow? I assume that's " of water not mercury...................
       
    • pittsburghracer

      pittsburghracer Well-Known Member

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      If I remember right I had a total of 4 running testing my B1 heads that maxed out slightly over 420 cfm. There’s more on the table that I will go after on another set but I had to get going on that engine. I took port molds to speed porting on my next set
       
    • '63GT

      '63GT Well-Known Member

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      pittsburgracer,
      Whose software are you using? I don't recognize it.
      That's a good Idea though.. only turning on as many motors as you need..
      I take the last 2 are controlled by the software? or rheostat?
      You have a dedicated power source too, I suppose?
       
    • pittsburghracer

      pittsburghracer Well-Known Member

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      I wired in a 220 circuit just for the bench and I bought and automatic depression control from a Bruce but I will never install it because I don’t want to rewire the bench. Bruce has the software program that I use on his forum. What made me build this bench is I bought one years ago that used electronics like this but it was huge in size, and low in power. It tested at 10 inches and converted to 28 inches. l bought another bench that used two fluid manometers but being fluid it was constantly changing with weather and the barometer. So I built one that is totally electronic on reads the same at -20 degrees or 100.
       
    • '63GT

      '63GT Well-Known Member

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      ….and didn't you love it when a buddy sticks his hand over the port, to feel the air flow, and half of the fluid got sucks out of the manometer ? :(
      My machine uses electronics too. But I still have to enter weather, or it does not repeat well. (Audie)
      Love your build though... I'm jealous :)
       
    • pittsburghracer

      pittsburghracer Well-Known Member

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      I almost bought electronics for My manometer bench but I figured being a pilot style bench weather would still be an issue. Bruce has plans now for benches that flow up to 100 depression. That’s some crazy air flow. Lol. He sells some very nice calibration plates that he makes.
       
    • '63GT

      '63GT Well-Known Member

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      Like the electronics SuperFlow offers?
      I assume you meant, 'pitot'?
      If so, mine is as well. It was fairly inexpensive, start up wise... I sometimes have issues associated with not enough plenum volume. but I've managed to quell them, for the most part.
      I did add a accumulator, in line, on both sensor hoses to help dampen signal. It really calms down the readings and it actually improves repeatability.
      In all, I like my oldish machine. Tests are performed very quick.. just long enough to make lift changes. (I still use a lift fixture)
      Yes, 100 H2o is a LOT. You're gonna have to use thicker panels ! lol