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polishing carb internals

Agemax

Agemax

Forum Guru
i know the basic principles of fuel/air atomisation requiring a slightly rough surface to help "mix it up" but i was wondering if any body has gone to the trouble of polishing the actual inlet tracts in their carbs, and may be the slides?
if so did this help or hinder the carb settings?
just curious :?:
 
Agemax said:
i know the basic principles of fuel/air atomisation requiring a slightly rough surface to help "mix it up" but i was wondering if any body has gone to the trouble of polishing the actual inlet tracts in their carbs, and may be the slides?
if so did this help or hinder the carb settings?
just curious :?:
Click to expand...

Polishing there is probably detrimental to good atomisation, which needs to start as early as possible in the induction tract, inboard of the needle jet. You may gain some flow advantage by reshaping the carb inlet, but you need to know where to add/remove material. Without a flow testing jig, you could go backwards too.;)
 
I could see a benefit from polishing the slides, so long as you made damn sure no polishing compound or residue stayed behind before putting them back in. Polishing them to make certain they were smooth could help ensure they glide up and down in the carb bodies.
 
Polishing things such as the slides also removes materials and changes the diameters of them...leave well enough alone has its places...if you know what I mean.
 
Agemax said:
thought as much, i just like polishing lol. im like a magpie, i like shiny things
Click to expand...

If that's so then I have much parts you can polish.:)
I hate it!

No way I would touch the inside of a carb.
I agree with Chuck, leave well nuff alone!
 
Octain said:
If that's so then I have much parts you can polish.:)
I hate it!

No way I would touch the inside of a carb.
I agree with Chuck, leave well nuff alone!
Click to expand...

bring em over mate, i love it. so much satisfaction from going from a scabby old cover to a piece of mirror perfection
 
A polished bellmouth is that way for a reason. It allows the air to flow as easily and quickly as possible thru it. Where its clamped to the carb is exactly where the turbulance needs to start..at the carb and not halfway down the intake pipe.
 
chuck hahn said:
A polished bellmouth is that way for a reason. It allows the air to flow as easily and quickly as possible thru it. Where its clamped to the carb is exactly where the turbulance needs to start..at the carb and not halfway down the intake pipe.
Click to expand...

my bellmouths are spun satin aluminium so would they be better off polished?
 
not a brilliant pic, they are not as shiny as they look. they have had a wiz over with some autosol just to make sure they are clean.
100_1363.jpg

maybe a better pic
100_1366.jpg
 
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may be a site problem, i can see the pics if i scroll through the thread? ? done through photobucket. never had a problem before!
 
Just post the link and i might see them that way...dont know why i cant see them?? strange.
 
They are way smoother than the internal passages of any carb..and just as the air hits the face of the carbs theres the edges of the different passages that start the turbulance going. I think if youd like to polish the bells thats a total cosmetic decision on your part really.
 
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