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TE SmartCarb

Started by retaRD, July 26, 2020, 12:48:11 PM

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thatguy

Quote from: retaRD on July 27, 2020, 11:59:14 AM
Quote from: thatguy on July 27, 2020, 08:12:15 AM
Lectrons are tried and true. I see no reason to attempt reinventing the wheel.

They're not reinventing, just improving apparently.
There's a link in the original post explaining their carb vs Lectron.
The smartcarb was designed by the same guy who designed Lectron, Lake Injectors, etc.

This I knew. And stand by my statement.
"Don't be too timid and squeamish about your actions. All life is an experiment." – Ralph Waldo Emerson

m in sc


racerclam

Smart or lectron does nothing to make laminer air flow and linear power . A modified VM or PWK with venturi dividers and a intelajet is un beatable in performance . I have also installed venturi dividers in Lectrons . But adjustability with intelajet is awesome plus fuel is discharged atomized fro the nozzle

racerclam

one moe pic

m in sc

has anybody on here used a lake carb or a new smart carb at all, 1st hand experience? 

Jspooner

Quote from: racerclam on July 29, 2020, 10:52:19 AM
plus fuel is discharged atomized fro the nozzle

Isn't that part of what makes Lectrons work so well is that they "atomize" or "vaporize" the fuel?
"Just quit brain fucking it and get it done"

m in sc

year sgo when chuck was still heavily involved in the watercraft racing, he showed me some pics of carbs they had made with 30? annular discharge nozzle ports around the carb. that was some seriously sexy stuff right there.  Not sure if he'd share pics, and impracticable on a bike id think, but man. talk about 2 stroke carb porn.

retaRD

Quote from: m in sc on July 29, 2020, 12:33:18 PM
year sgo when chuck was still heavily involved in the watercraft racing, he showed me some pics of carbs they had made with 30? annular discharge nozzle ports around the carb. that was some seriously sexy stuff right there.  Not sure if he'd share pics, and impracticable on a bike id think, but man. talk about 2 stroke carb porn.

Yeah, that was pretty incredible.  The overall design was pretty ingenious, too. 

m in sc

that was a good night for sure.  :celebrate:

teazer

There are several variables at play with carbs.  One is air flow and that includes all the varieties of UFO's and splitters which are all about smoothing out air flow through the carb body.

The other factor  and one that is being discussed here, is fuel atomization.  Fuel is not a vapor, it's liquid, but the liquid doesn't burn.  What burns is the vapor on the surface of each duel droplet.  For a given volume (or mass) of fuel, smaller droplets have more surface area than large ones, so breaking fuel into small droplets helps to create a faster and more complete burn.

That's why needle jets in a bleed design are often called emulsion tubes because the break the large flow into smaller droplets. One of the Japanese carb manufacturers recently introduced a new version of their flatslide carbs and they have a series of tiny holes in the needle to allow fuel to better atomize. 

That's also why fuel injectors went from one single orifice to multiple holes for fines spray and smaller droplets. 

The average piston ported two stroke has a needle jet with a tall spray tube to introduce air into the fuel spray and since a two stroke has a pretty violent inlet system in terms of pressure waves, the atomization process is typically adequate if not perfect.
A reed valve changes those pressure pulses and that's why we see bleed type needle jets in RDs.  They improve atomization and reduce the amount of unburned fuel going out the pipe.

That carb design appears to bring more air into the bottom of the needle jet and then discharges fuel and air in smaller droplets through many discharge nozzles.

A flat slide significantly reduces turbulence compared to a round slide so they used that feature to improve air flow as well.

I would guess that Chuck's carb design was addressing the same droplet size issue.

I am not a big fan of air flow smoothing devices but they may reduce turbulence across the needle or idle jet outlet a little which might create a higher air flow across the jet which in turn would generate a greater pressure differential and would cause more fuel to flow at smaller throttle openings compared to s stock round slide as witnessed by the smaller pilot jets needed with those devices. 

I'd like to see a comparison of fuel flow rates and torque in back to back dyno runs though to see the real world impact. I can see that a so called stronger signal should make the motor slightly more responsive.  It won't neccessarily make any more power but if it responds faster it will feel that way.

A real improvement would be a twin injector set up with multiple orifices. 

85RZwade

 :good: speaking of two-stroke porn, that posting should have begun with: "Dear Penthouse..." Well written, I love this stuff!
I post waayyy too much

teazer

Welcome to 2strokeworld where the customer always comes first...............

sav0r

Years ago I was given one of these Tryton carbs. It wasn't very good, but the atomizing inlet reminds me of what was brought up before. You could turn the bell and depending on its position it was supposed offer different advantages.



http://www.gear.ee/shop/index.php?route=product/product&product_id=3216#.XyLCbsfQiCo
www.chrislivengood.net - for my projects and musings.

m in sc

kind of. I wish chuck would post a pic, it was pretty amazing.

racerclam

Just want to mention that venturi dividers are not air smoothers. But velicity increasers , Example on the inlet side or air filter side true the dividers eliminate air tumbling at the back of the slide , yes smoothing air flow and directing it under the slide  BUT! without a venturei divider on the oposite side of the slide air expands to the full size of the venturi thus decreasing velosity . The dividers keep air speed up all the way through . Therefore its like opening four smaller carbs in series making linear power . It allows running bigger carbs with out the down fall of the slow air speed BLAH!  If some one hasnt tried one they have no idea how well it works , I have many customers who would gladly tell you haw pleasred the are with what it does . It has actually been proven to perform better than a exaust power valve . If anyone want to talk to some of my customers give me a call and I will hook you up to talk with them. Many say its the best money they have spent on thier bike .  702-858-9711

Rich