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How to best clean twin SU carbs?

To: mgs@autox.team.net
Subject: How to best clean twin SU carbs?
From: Tab Julius <tab@penworks.com>
Date: Fri, 19 Sep 2003 11:45:32 -0400
My '78B has twin SU carbs; I've been having intermittent (but always at 
inconvenient times) power problems; it more often than not happens on the 
highway when it's being given some gas.  It falters, and slows, and will go 
like that for a few minutes, then will magically recover and be fine 
again.  It seems to be a fuel delivery problem.

I replaced the fuel filter; it originally seemed to make a difference on a 
quick test drive (about 10 miles @ 80 mph, no problem) except it faltered 
at the end.

I then used GumOut, and the car liked the octane boost, but it wasn't long 
before it was faltering again.

Now I'm looking at the carbs; I've no experience cleaning these (they've 
been on the car about 2 summer's worth).  I unscrewed the top "bowl" or 
whatever it's called, on one of them, but it looked spotless inside.  If I 
was to clean "gunk" out of the carbs, is this where it would 
accumulate?  If so, I'll check the other one (I only wanted to fool with 
one at a time).  I don't want to screw up the carb settings, so how can I 
safely clean them (or make sure they're not gunked) without screwing up the 
tuning?

I can find articles on tuning them, but not on cleaning them...  any 
suggestions?

Thanks

- Tab




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