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Absolutely fascinating carbs. nothing to them Just another carb, all the extra little tubes etc make them a little more time consuming to clean, but once cleaned properly, great carbs. The most important thing I learned over the years about cleaning carbs, is you have to have flow as in liquid. Not just be able to blow air through the little passages. You must be able to move liquid, not just air.
Its just like overhauling any other carb: disassemble, clean-clean-clean, reassemble. You don't have to actually understand how everything works or what it does ! Interesting carbs, though. The jets, emulsion tubes, even the venturis and throats can be removed and serviced with the carbs still on the car, if the need arose. Everything is accessible by taking the top cover off.
Cheers
DD
And Weber's are very well designed, such that it is difficult or impossible to put them together with parts in the wrong place. I've rebuilt several 40 IDA 3C Weber's for Porsche, and found them very straight forward. Tuning a stock Weber was very straight forward also, and long as you followed the steps in the right order. Tuning them for performance applications was another matter, as there is a dizzying array of emulsion tubes, intermediate and primary jets, not all of which are straight forward in their effects.
Unfortunately most Weber's need to be rejetted, especially idle jets, for today's gasoline. Its characteristics are very different from what they were initially tuned for. Typically going up one size on the idle jets will fix idle and transition issues, but not always.
It's funny, when electronic fuel injection came out, nobody wanted to deal with it because they understood carbs. Now the opposite seems to be true.
I rebuild carbs on motorbikes and have a ultrasonic bath, night and day difference to cleaning carb bodies.
Did the spray and blow option but still had issues.
Might be a bit late but if you have on going problems this is the stuff.... label says in California this stuff causes cancer... so you know it good LOL
Its hard to remove the varnish left from the new fuels when left in carbs for months... terrible stuff. I always drain my carbs if not be used for a month or more.
Even my hedge trimmer, learned that the hard way!
I'm nowhere near done with the first Ferrari when I've been tasked with resurrecting another. Gah !
This one is a 1967 330GTC. I just had to chuckle out loud when I pulled the wheel and saw the parking brake set-up. This will look totally familiar to anyone with an inboard brake Jag :-)
I'm nowhere near done with the first Ferrari when I've been tasked with resurrecting another. Gah !
This one is a 1967 330GTC. I just had to chuckle out loud when I pulled the wheel and saw the parking brake set-up. This will look totally familiar to anyone with an inboard brake Jag :-)
Cheers
DD
My Alvis TD had the same setup, and all you had to do to adjust it was poke a screwdriver through the spokes and turn the large slotted screw! No worrying about does the automatic adjuster work!
Been a year since I updated this thread. Haven't had a lot of time to devote to this project but an hour here and an hour there eventually yields results!
Believe it or not....I was a bit amazed, personally....the engine actually starts and runs ! Now comes the fun part: getting six carburetors and two distributors singing in perfect harmony. Wish me luck !
