Carbs sucking air, carbs sucked air so I rebuilt them |
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Carbs sucking air, carbs sucked air so I rebuilt them |
mikelsr |
Aug 29 2005, 02:59 PM
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#1
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Senior Member Group: Members Posts: 657 Joined: 2-January 05 From: Mahomet, IL Member No.: 3,390 Region Association: Southwest Region |
I have a carb'ed teener that is having some problems. Every since I bought the car I have had problems with the carbs (40mm Dellortos). A friend of mine let me borrow his until I get my fixed (his run great on my car). Well it has been a while and I want to get them back to him. So I am looking for words of wisdom.
I am getting a lot of carb backfiring so I rebuilt the carbs and had exactly the same problem. I found a couple of places they were sucking air and replaced the O-rings with another set and that fixed those leaks but I am still backfiring. I assume that it is still sucking air (need to test it again) or an air passage is blocked. Tonight I will tear them down again and let them soak for a day or two and then blow them out really well. I thought I had cleaned them well enough but you ever know. I also think that the jets may need to be replaced with different sizes (I am going to start out with the same size jets my friend has since I know they work with this engine). I don't have the sizes with me here at work. What size jets do most people use? From what I know the cam is original so it was designed for FI. This winter I will replace the cam and most likely rebuilt the engine. TIA |
MecGen |
Aug 31 2005, 05:48 AM
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#2
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8 Easy Steps Group: Members Posts: 848 Joined: 8-January 05 From: Laval, Canada Member No.: 3,421 |
Had my Dells for 10 years, love em
PugBug hit it on the nose...syncro - ization and throttle linkage. When it pops thru the carb is a lean condition, if your carbs are not synked or linkages are not tuned causing one side to be leaner/later, on a accelleration/off idle. When I first put them on, it took a while to figure out the sync. These carbs are nutorious for "whistle" under accelleration, not a vacume leak. If anything check your intake gaskets, I have had problems with jobber gaskets. A carb overhaul is never lost, just good maintenance ! I will be doin my baby Dells shortly, gonna check out that update kit from CB Keep us informed ! later (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) |
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