polishing carb internals

[Agemax]

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

[49er]

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

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.

[MisterCinders]

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.

[Agemax]

thought as much, i just like polishing lol. im like a magpie, i like shiny things

[chuck hahn]

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]

what about a polished bellmouth compared to a spun satin finish aluminium?

[Guest]

thought as much, i just like polishing lol. im like a magpie, i like shiny things

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!

[Agemax]

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!

bring em over mate, i love it. so much satisfaction from going from a scabby old cover to a piece of mirror perfection

[chuck hahn]

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.

[Agemax]

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.

my bellmouths are spun satin aluminium so would they be better off polished?

[chuck hahn]

Post pics of the critters..just how smooth is the interior surfaces??

[Agemax]

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.

maybe a better pic

[chuck hahn]

Not seeing a picture???

[Agemax]

there is 2 pics on now, they show up on my thread?

[chuck hahn]

2 boxes with red Xs is all i see??