cfm vs velocity

paulkish

old fart
It's been so many years ago since I was knowledgeable about carbs I think I messed up saying just 4 circuits when there may be 5. 50+ years ago I was able to recite location of fuel input to each circuit, where the passages went and where the output was for each circuit on every brand made for car companies. And also where to look for and how to remove a restriction in a passage per symptoms on each. ... :(

It's the same idea but I think it may be idle, low speed, intermediate, high speed and then THE 5th, instead of idle intermediate, high and then THE 4th. sorry messed up again but the thought and logic fix is the same. ... :(
 

paulkish

old fart
awwww since i'm lookin dumb anyhow... the 4th or 5th circuit is the accelerator circuit be it called a pump or power valve. ... :)


ok let the slings and arrows comence.
 

Ksfastman

Member
Interesting , I have a mechanical two seperate feed / butterflys , for a twin , mechanical injection setup . Never had it on an engine . So the pill is for bleeding fuel off at high rpm ?
Looking at the limitations of the current air driven carburetor, its basically a siphon tube , bowel and butterfly .
Pill and Barrel valve, is it a MRD unit?
 

Ksfastman

Member
I'd really like to get another one of those...MRD that is. Our house and my shop burnt to the ground, so I can't make pumps anymore.
 

flattop1

Dawg 89
Austin has been working on a stepper motor and aurduino for just that purpose . Still in the beginning stages , it does function , the application is the trick now .
 

flattop1

Dawg 89
For sure not mrd probably from the early 60's.
1 3/8 bore off a 500cc triumph .
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flattop1

Dawg 89
Whole assembly
 

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Ksfastman

Member
Yep, you're right...not an MRD. But very very similarly. I just ordered a 3D printer. Got to thinking about it this morning and realized the throttle body could be printed also.
 
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