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Anyone seen these and know the website or have a link?
What is a "shooter?"
Something like this? Thompson Performance, LLC
Carburetors already vaporize fuel. That's their whole design.
Gotta disagree. They atomize, which aids vaporization. Same as fuel injection.
The stream of fuel leaving the acc pump nozzle is solid fuel, no air mixed in. Fuel leaving the booster has air mixed in via the air bleeds. Most carbs aim the pump shot at the booster to force it to break up into smaller particles that can mix with air because raw fuel does not burn. I wouldn't use the 'gadget' shown in post #3. While it might help break up the fuel stream, it will reduce air flow & also re-direct the air flow. Could lose significant HP by causing rich/lean conditions in some cyls.
Seems a bit gimmicky to me. In their video they are holding the throttle open much wider and longer in the with video then in the without part.
Thanks John, I was thinking of the elongated tubes that come out the shooters. Not sure where I saw them. If the plates work, that would be great. Do you have a link to any reviews or know how I could find some on it? (That are not on their web page.)
I have dynoed the plates on a 602 gm crate motor and 650 holley. Circle track application. The customer said he had a hesitation when picking up the throttle. Someone recomended the plates to him and he tried them. He said they fixed his problem. I was skeptical so I tested with the plates first and saw no hesitation. Next I removed the plates and noticed a hesitation as I picked up the throttle when testing . Also I noticed it made more power without the plates. I think it was in the 3-5 HP range if I recall correctly. That's Average HP from 4000 to 6200 rpm on a motor that makes around 350 HP. peak. I checked and the nozzles were aimed right at the boosters. So to double check I repeated the test and got the same results. The plates seem to cover up the lean spot with less fuel. Unfortunately they also seemed to restrict air flow through the carb at wide open throttle. Not to surprising as they take up alot of space in the venturi. I ended up increasing the nozzle I think around .004" and fixed the hesitation without the plate and kept the power. i might have left the plate in on a street application where mileage was more of a priority than the 3-5 HP gained.
Thanks 92b, That was my suspicion, They are in the way of full intake flow at WOT.
Let me ask you something then... because.. I always find this type of explanation almost irritating....So... if you plug the air bleed on the idle circuit....will fuel come out and idle still... Think about its function.
What almost irritates you in particular about his explanation?
This whole damn thread is irritating.
I think they make a elixir for that
I don't subscribe to David Jizzard but he had a very good point about people misappropriating terminologies. Let's just say i think a stoner might have better grasp on a carburetor than your average motorhead. How much fuel can be siphoned out.. is dependent on the bleed size, right? Boosters.. what do they do, is it mix the air n fuel?
Sounds like it may have had a transfer slot issue and the plate masked the issue. The fuel in the T-slot is quicker at reacting to the initial movement of the throttle than the shooters and is constantly exposed to vacuum or should be when closed.
Depends if the accelerator was clearanced .050 gap from contact or depressed .050 from full diaphragm bottoming out. More than not...people get that wrong. As soon as you breath on the throttle..the shooter should be activated. Pump cam, nozzle size as well could be issues. And are we talking wot from idle or from cruise as well.
Lie down on the couch and lets talk about why your feeling irritated. I'm sorry it looks like our time is up for this week. We can pick up where we left off next week. Until then remember to practice taking a deep breath and finding your safe place. Hesitation was on rapid movement of throttle from completely off throttle to wide open throttle.
In neutral , clutch or in gear from a stop. What trans? You can crack the throttle wot as fast as you can on a perfectly tuned motor in neutral and it will do the wuh.. ahhhhhh. Normal.
Well hello "Vaporized fuel", good to see you.. may I interest you is some 'vapor lock'.
Manual transmission in gear picking up throttle hard and fast exiting the corner on a heavy race track. Customer said it was working fine after I changed the nozzle. Also was working fine with the Thompson plates.
So are we comparing as to understand the why behind the Thompson plate? I have a massive head cold , focus isn't strong today.
What's a heavy race track? I'm sure they're all heavy with all that dirt and asphalt.
I'm just answering your questions. I don't know what we're doing. lol