Divider in hat, Yes/no???

Discussion in 'PSI Superchargers Tech Questions' started by roar, Nov 22, 2012.

  1. roar

    roar New Member

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    Hi All

    Fitting a new 3 blade carbon hat and would like to know if I should be putting a divider in it?.
    Blown SBF 358 cubes, with 8/71 standard helix LB20 and Knut 11" tall, 3 blade carbon hat with 9.5" opening that is the same size as the top blower opening.

    Is there any advantage of fitting a divider to this style of hat and if so, how far do you extend it into the hat and what distance do you keep from the rotors.

    Thanks Lyle.
     
    #1
    roar, Nov 22, 2012
  2. Mike Canter

    Mike Canter Top Dragster
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    Used to be that it was a good thing to have a divider and now it is not. Don't know what changed but racers in the know are not using a divider. When we did it was put as close to the rotors as was safe while remembering the rotors flex some. More is gained by putting a machined spacer between the blower and the hat.
     
    #2
    Mike Canter, Nov 22, 2012
  3. andy wilfong

    andy wilfong Active Member

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    If you do put a divider in, in needs to be .060-.080 from the rotors, the divider helps the air from spinning like a tornado in the injector, there is still a lot of debate on this subject, it would take someone with time, money and a good type of injector type dyno to really be conclusive, and then it would still depend on overdrive and the advantage,
     
    #3
    andy wilfong, Nov 22, 2012
  4. Mike Canter

    Mike Canter Top Dragster
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    Darren of DMPE did all that testing and that is why he doesn't use dividers anymore.
     
    #4
    Mike Canter, Nov 22, 2012
  5. TOL

    TOL Active Member

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    Does Darren still advocate the screw insert stuffer plate which sort of is the same thing/idea as the divider, or has he changed his preference to an open common space? Kind of curious. Thanks.
     
    #5
    TOL, Nov 22, 2012
  6. roar

    roar New Member

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    Thanks for the quick replies.

    Mike is there an advantage of runnung a spacer between the hat and blower if the openings are already the same size. I know I have read your post before in regards to aligning the opening's through a spacer but would like to know if there is any gain by running a spacer when both openings are the same?

    Thanks again. Lyle
     
    #6
    roar, Nov 23, 2012
  7. Mike Canter

    Mike Canter Top Dragster
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    Yes there is. The spacer moves the injector forward and lessens the angle of the air turning through the injector down into the blower and this results in more air going into the motor so more power.

    The size of the opening the shape of the shoe/insert and the spacer are all tuning tools and how much it changes your power depends a lot on what blower you have and what your overdrive is and other conditions.
     
    #7
    Last edited: Nov 23, 2012
    Mike Canter, Nov 23, 2012
  8. john348

    john348 Top Alcohol

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    Mike
    I read most everything you write with great interest, this subject i have to say maybe.
    I believe with your ADRL type injector you may are correct, but with a low profile injector that can't be raised or moved to much to see over as with a roots funny car style, there may be some thing there to be gained, yes i know that class has all but vanished but when it was around we did notice that the normal "fluff" that was stuck to much of the top of injector was almost gone with the divider and had some small gains with it. I am not positive that maybe it just redirected the "fluff back into the intake but it seemed to help on that style injector.
     
    #8
    john348, Nov 23, 2012
  9. Mike Canter

    Mike Canter Top Dragster
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    John, tell me what you mean by low profile injector on the funny car type setup. I blieve that if I remever correctly our injector is only 8" high not counting the spacer. Yes I do agree that a few years ago the injectors needed the divider but in today's injectors don't The Bird catcher did improve with a divider but one lost so much air making that sharp turn down into the blower then a sharp turn to the back of the blower. In the old style injectors it was hard to look in the butterflies and see the back of the rotors as you can with today's injectors.
     
    #9
    Mike Canter, Nov 23, 2012
  10. john348

    john348 Top Alcohol

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    #10
    Last edited: Nov 23, 2012
    john348, Nov 23, 2012
  11. Mike Canter

    Mike Canter Top Dragster
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    Beautiful car. No insult intended here but based on what I know looking at those injector hats they are based on old technology and probably do work better with a divider. The latest design injectors must be steering the airflow a lot better so they don't need the center divider. So now the question is if the 11" tall Knute injector that Lyle is using needs a center divider or not. Based on what I have seen from Knute, JBR and DMPE if the hat needed a divider then it came with one.
     
    #11
    Mike Canter, Nov 24, 2012
  12. crdafoe

    crdafoe Member

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    Great info. What about the "inlet lip" that PSI made for their low profile and deep throat injectors? Did those units gain anything from using it? And, now that the rumor is that PSI is closed up, where would one get one if needed?

    Thanks
    Chris
     
    #12
    crdafoe, Nov 24, 2012
  13. Mike Canter

    Mike Canter Top Dragster
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    From what I have seen and heard from other tuners is that the lip does help. I believe DMPE makes one. If not you will have to wait until somebody buys PSI.
     
    #13
    Mike Canter, Nov 24, 2012
  14. sniderracing

    sniderracing Member

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    Spike Gorr also builds a plastic one that works well & weighs nothing. Around $500
     
    #14
    sniderracing, Nov 24, 2012
  15. M Tigges

    M Tigges TAFC

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    PSI injector

    When we ran a roots with a psi injector adapter deal. we made out by diverting air to the front 3 inches of the rotors. Davenport made us a different endframe for out Big MERT we had. todays blowers and injectors are no comparison to what we had in 2006.
    time maybe better spent working on your setup with what you have.

    we made a raised spacer 2 inch high 2 inch forward in 1998. because the injector was under the body. we had the center of the front main at 8 inches when we built that car. being albe to see is far more important! Quote my father, if you cant see well it takes to long to react to the car.

    Mark
     
    #15
    Last edited: Nov 24, 2012
    M Tigges, Nov 24, 2012
  16. AFC357

    AFC357 New Member

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    Mark, I must say, back in the "good ole days"....I remember looking between your hat and blower and wondering what ya had going on:D You guys ran HARD and didnt hurt many parts (unlike me) always wondered what ya had "going on"??!! Ahh...the good ole days?!
     
    #16
    AFC357, Nov 24, 2012
  17. TOL

    TOL Active Member

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    So what is the deal with PSI these days? Actually closed? To be sold? Other?.....
     
    #17
    TOL, Nov 24, 2012
  18. Mike Canter

    Mike Canter Top Dragster
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    Mark is 100% correct. The Roots blowers and hats that are state of the art today are totally different that what was available in 2006. I am not going to give out any boost figures here but I will tell you that the amount of boost seen on these specialty blowers for 14.5% and 20% ODs is amazing plus it requires less HP to spin and the outlet temps are way low. The only problem is the cost $$$$$$$$$$. The cost is so high that it keeps a lot of guys who can't afford them from being competitive in NHRA and ADRL legal PM but then look at the cost of a Buck or Rehr Morrison nitrous motor or a Kaase ProStock motor. It is all horsebucks.
     
    #18
    Mike Canter, Nov 25, 2012
  19. M Tigges

    M Tigges TAFC

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    Hello Tim, We just used the same parts for a long time! theres more in working with the same parts over time than any trick of the week! my 10 cents. Dad would always keep my wacko ideas in check! perfect balance! LOL.
     
    #19
    M Tigges, Dec 11, 2012
  20. AFC357

    AFC357 New Member

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    I always admired you guys.....never saw any "flying cell phones" in yout pit:eek: Im sure you and I are the only ones that know what I'm talking about?!
     
    #20
    AFC357, Dec 11, 2012

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