Anyone try Thompson powerblast plate

Fuel and Air Systems

  1. pishta

    pishta I know I'm right....

    Messages:
    16,215
    Likes Received:
    5936
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    6:08 AM
    Great discussion but I think your last point is gonna be the hardest to prove. Where is the highest output in motorsports and how could a carb(s) feed that much HP? 2015 US Army Dragster may have topped 11,000 HP. How else are you going to feed that besides fuel injection? Not enough air to carry that much fuel into the cylinders. Here is ONE injector from a 2008 video, and they already have gone faster...
     
    • Like Like x 1
    • rumblefish360

      rumblefish360 So close, yet so far away

      Messages:
      36,989
      Likes Received:
      8809
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      Local Time:
      9:08 AM
      Going to the extreme end of the spectrum does t prove your point nor does the extreme pumping power of that pump since the pump must pressurize the system that isn’t using all of what is pumped on a street or lower level strip car Nor the top fuel car.

      True, the TF car will gobble up ridiculous amount of fuel.
      How does this apply to today’s topic.
       
    • pishta

      pishta I know I'm right....

      Messages:
      16,215
      Likes Received:
      5936
      Joined:
      Oct 13, 2004
      Location:
      Tustin, CA
      Local Time:
      6:08 AM
      Your last statement was what it was. I just showed you some evidence contradicting that.
       
      • Agree Agree x 1
      • TT5.9mag

        TT5.9mag Two atmospheres are better than one

        Messages:
        161
        Likes Received:
        160
        Joined:
        May 5, 2016
        Location:
        So cal
        Local Time:
        6:08 AM
        Rumble, while you are spot on most of the time I disagree with the statement you made regarding carb vs mpfi and hp. In today’s world a properly tuned mpfi with individual cylinder fuel and timing control will make more power than a carb every single time.
         
        • Agree Agree x 2
        • rumblefish360

          rumblefish360 So close, yet so far away

          Messages:
          36,989
          Likes Received:
          8809
          Joined:
          Jun 21, 2005
          Location:
          New York, on a Island
          Local Time:
          9:08 AM
          Thanks. OK then, cool. And I can find this on an average hot rod?
          Ummmm, no. You showed an extreme environment. Not in the same league being discussed. Your off topic. What we’re talking about is a street bound N/A carburetor engine.
           
          • Agree Agree x 1
          • my68barracuda

            my68barracuda Well-Known Member

            Messages:
            1,036
            Likes Received:
            703
            Joined:
            Dec 6, 2009
            Location:
            Indianapolis IN
            Local Time:
            9:08 AM
            Rumblefish, go back and read your last sentence from your post #74
            I believe that is what pishta is responding to.
             
          • TT5.9mag

            TT5.9mag Two atmospheres are better than one

            Messages:
            161
            Likes Received:
            160
            Joined:
            May 5, 2016
            Location:
            So cal
            Local Time:
            6:08 AM
            Well average is a completely subjective term open to many interpretations. Here in so cal at the 3 or 4 tracks I frequent it is not uncommon at all. In fact more and more average hot rods built nowadays are going that route.
             
          • rumblefish360

            rumblefish360 So close, yet so far away

            Messages:
            36,989
            Likes Received:
            8809
            Joined:
            Jun 21, 2005
            Location:
            New York, on a Island
            Local Time:
            9:08 AM
            OK, thanks. I think this is off track anyways.
            I’m wrong? OK, no problem.
            I just do see how a fuel injected blown top fuel type fuel pump and engine fit into the topic. I guess I’m missing something. I’m certainly not going to fight about this with my ol’buddy pishta.

            Also re thanking @TT5.9mag , @pishta and yourself.
            I must be on a different rail track in my head.
            Anyways.... back to the power blast plate....
             
            • Like Like x 1
            • pishta

              pishta I know I'm right....

              Messages:
              16,215
              Likes Received:
              5936
              Joined:
              Oct 13, 2004
              Location:
              Tustin, CA
              Local Time:
              6:08 AM
              Its all good. I just wish we were having this conversation playing pool! :)
               
            • rumblefish360

              rumblefish360 So close, yet so far away

              Messages:
              36,989
              Likes Received:
              8809
              Joined:
              Jun 21, 2005
              Location:
              New York, on a Island
              Local Time:
              9:08 AM
              Well, the beer and pool part is great. The intelligent conversation will steadily drop after a few beers and I’ll be to busy joking around talkin shit that is truly meaningless but probably funny as hell. I’ll be honest and say I’ll probably top the night but ether getting slap by a girl or punched by her other half.

              Atter that, I am not responsible for any injuries you incur due to unstoppable laughter up to and including death due to my Shenanigans.

              (PS, the wife just concurred....)

              (PSS, Don’t listen for her when she says “He’s had enough, he is slurring his words.”)

              :rofl:
               
            • TT5.9mag

              TT5.9mag Two atmospheres are better than one

              Messages:
              161
              Likes Received:
              160
              Joined:
              May 5, 2016
              Location:
              So cal
              Local Time:
              6:08 AM
              Back to the powerblast plate, I really cannot see how those can effect WOT horsepower production. Really they are on a completely different circuit. The squirters are there to cover up a momentary lean dead spot on tip in right? So on a properly tuned carb set up there is really no power to be gained. Now how can we test drivability? That’s the question here. I can see them making a difference in how the engine reacts on the street in average (there’s that word again Rumble) driving scenarios. Johnny will you be street driving this car at all? I know it’s a bracket car, but any road time?
               
            • yellow rose

              yellow rose Doctor of Thinkology.

              Messages:
              20,023
              Likes Received:
              16128
              Joined:
              Jun 19, 2015
              Location:
              Living on the razors edge
              Local Time:
              6:08 AM

              It's not about power. Here is a what if?

              What if they actually allow the tuner to use a smaller pump nozzle and maybe a less aggressive pump cam and not lose driveability?

              That's a big deal. When you touch the throttle and the vacuum falls, any and most all of the fuel mixed with air will reform as a liquid and fall onto the floor and walls of the intake (wet flow or wall flow) and that includes some of the pump shot.

              95% (or more) of that fuel that falls out of suspension never gets back into the air stream (regardless of port finish) and just runs into the combustion chamber, stratifies and ends up as partially burned fuel out the pipe.

              So, if you can reduce some fuel from the accelerator pump, you help the wet flow conditions.

              That's a big deal.
               
              • Like Like x 1
              • TT5.9mag

                TT5.9mag Two atmospheres are better than one

                Messages:
                161
                Likes Received:
                160
                Joined:
                May 5, 2016
                Location:
                So cal
                Local Time:
                6:08 AM
                YR, that makes much more sense to me. I see this making a difference in drivability and now that you’ve explained it, making a difference in efficiency as well.
                 
              • mderoy340

                mderoy340 Well-Known Member

                Messages:
                2,180
                Likes Received:
                930
                Joined:
                Aug 2, 2012
                Location:
                Melbourne FL
                Local Time:
                9:08 AM
                I use the Demon nozzles because they are drilled at the correct angle to shoot fuel into the center of a down leg booster venturi. Holley nozzle hits the side and drips at low rpm.
                IMO 60' is the only way to tell if pump shot is correct. Butt dyno is fine on a street car.
                Demon Carburetion Accelerator Pump Discharge Nozzles 122131
                 
              • 71_dart_swinger

                71_dart_swinger Well-Known Member

                Messages:
                206
                Likes Received:
                38
                Joined:
                Apr 6, 2007
                Location:
                central valley cali
                Local Time:
                6:08 AM
                So this post escalated quickly off into left field. So I got a pretty good idea how ally of you guys feel and think of them. I’m actually scheduled for some dyno time beginning of January. I’ll do a run with and without the plates to see if there is any difference on the set up I have . . Won’t know until January.
                 
                • Like Like x 2
                • RustyRatRod

                  RustyRatRod Weenie idiot loser. FABO Gold Member

                  Messages:
                  58,037
                  Likes Received:
                  28179
                  Joined:
                  Jun 7, 2010
                  Location:
                  Georgia
                  Local Time:
                  9:08 AM
                  Is this 100%?

                  BIG ASS.jpg
                   
                  • Thanks! Thanks! x 1
                  • Jadaharabi

                    Jadaharabi FABO Gold Member FABO Gold Member

                    Messages:
                    6,741
                    Likes Received:
                    7059
                    Joined:
                    Jan 8, 2016
                    Location:
                    Peoria, Illinois
                    Local Time:
                    8:08 AM
                  • fez440

                    fez440 Well-Known Member

                    Messages:
                    763
                    Likes Received:
                    85
                    Joined:
                    Jun 19, 2006
                    Location:
                    bc canada
                    Local Time:
                    8:08 AM
                    Just wondering when will you be dyno testing this month? Very curious to see how these work. Please post results :)
                     
                  • 71_dart_swinger

                    71_dart_swinger Well-Known Member

                    Messages:
                    206
                    Likes Received:
                    38
                    Joined:
                    Apr 6, 2007
                    Location:
                    central valley cali
                    Local Time:
                    6:08 AM
                    Had to postpone. He had to go to Colorado. Just waiting for him to get back
                     
                    • Like Like x 1
                    • 92b

                      92b FABO Gold Member FABO Gold Member

                      Messages:
                      44
                      Likes Received:
                      18
                      Joined:
                      Oct 25, 2013
                      Location:
                      Breda,Iowa
                      Local Time:
                      8:08 AM
                      I tested these on my dyno about a year ago. Motor was a 602 crate with a 650 track warrior no spacer. Base lined the motor with plates in and then took plates out and picked up a couple hp. Also picked up a hesitation when hammering the throttle. Which is why the customer put them on to begin with. Went up 3 or 4 sizes on nozzel and got rid of the hesitation and kept power the same (couple better than with the plates). So the motor seemed to require less pump shot with the plates . I can't say why it lost power for sure but they kind of hang in the venturis a little bit. Might be hurting airflow or possibly changing fuel distribution a little and the motor didn't like it. The air fuel ratio stayed the same at WOT. Only lost a couple horse on a 350 hp engine. I think their sweet spot would be for driveability issues. That being said under the right conditions on the right motor that change in fuel distribution ( if that's what it was) might pick up a couple horse.
                       
                    • Hemioutlaw

                      Hemioutlaw Make America Great Again! FABO Gold Member

                      Messages:
                      1,214
                      Likes Received:
                      582
                      Joined:
                      Feb 4, 2014
                      Location:
                      The Great State of Texas
                      Local Time:
                      8:08 AM
                      I bought em after having a couple few too many beers one night and after arrival I put them on the mildest motored car in the stable, 65' Cuda (318' w/ 650 cfm Holley and mild cam), from about all I could tell they made more noise. I mean you can see the fuel atomizing differently off the plates but when romping on it I didn't detect any noticeable difference in performance and they actually caused a bit of a stumble. Since the 65' in my avatar is just my sometimes putt around town car I don't like effing with it much since my other High Performance rides keep me busy enough.

                      Save your $$$ ...
                       
                      Last edited: Feb 3, 2020
                    1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                      By continuing to use this site, you are consenting to our use of cookies.