webber carb work |
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webber carb work |
william1764 |
Jul 27 2010, 10:02 AM
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#1
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Member Group: Members Posts: 252 Joined: 11-May 10 From: maryland Member No.: 11,717 Region Association: MidAtlantic Region |
mechanic is saying that he needs to remove carbs to investigate/fix backfire issue (bad). He believes carb(s) are dumping fuel which is cause of the problem- maybe float stuck or something? There is a heavy fuel smell after running the car...heavy! How many labor hours should I expect for removal, tear down and rebuild of carbs?
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pin31 |
Jul 27 2010, 12:36 PM
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#2
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Member Group: Members Posts: 398 Joined: 30-January 07 From: Newport, Rhode Island Member No.: 7,492 Region Association: North East States |
Bill,
The last thing I would do is mess with the carbs (and if you do please read the Weber book I provided). The popping on deceleration has been there since day one when I purchased the car from Camp914. The car runs great in all gears and under all loads/RPMs. As we discussed, if I was going to keep the car I was going to do 3 things. 1. I suspect there is an exhaust leak (most likely where the SS heat exchangers bolt to the engine). I included all the proper gaskets (and copper nuts) for that and also the gaskets where the HE bolts to the Triad exhaust. 2. Replace the stock fuel pump with a CB Performance 3.5 PSI Deluxe electric fuel pump (Pelican Parts, PEL-CB3193, $69.20). When the car came from Camp914 the fuel pump was dead (most likely the car carrier guy left the key on during transit). I replaced it with what was on it (stock fuel pump). Also get rid of the pressure gauge/regulator/tee that feeds the carbs (it came that way, I believe that’s how they reduced the pressure to 3-4 PSI). I would also replace the plastic fuel lines with the SS ones from Tangerine Racing (just for good measure). 3. Replace the Bosch 050 distributor (and the Pertronics II) with the Mallory unilight distributor (tweaked with the proper advance springs) that I provided to you with the car. Also, set the timing and for good measure, adjust the valves (I haven’t touched either since I bought the car (3,000 miles). 4. Then if it still pops on deceleration, I may consider a different exhaust (or live with the popping like I did). Even though I like it, I don’t think the dual-outlet Triad exhaust was properly designed (I don’t think it provides enough back pressure ….just a guess). Tim |
Ericv1 |
Jul 27 2010, 02:09 PM
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#3
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Member Group: Members Posts: 259 Joined: 30-December 07 From: Cincinnati, Ohio Member No.: 8,518 Region Association: Upper MidWest |
Bill, The last thing I would do is mess with the carbs (and if you do please read the Weber book I provided). The popping on deceleration has been there since day one when I purchased the car from Camp914. The car runs great in all gears and under all loads/RPMs. As we discussed, if I was going to keep the car I was going to do 3 things. 1. I suspect there is an exhaust leak (most likely where the SS heat exchangers bolt to the engine). I included all the proper gaskets (and copper nuts) for that and also the gaskets where the HE bolts to the Triad exhaust. 2. Replace the stock fuel pump with a CB Performance 3.5 PSI Deluxe electric fuel pump (Pelican Parts, PEL-CB3193, $69.20). When the car came from Camp914 the fuel pump was dead (most likely the car carrier guy left the key on during transit). I replaced it with what was on it (stock fuel pump). Also get rid of the pressure gauge/regulator/tee that feeds the carbs (it came that way, I believe that’s how they reduced the pressure to 3-4 PSI). I would also replace the plastic fuel lines with the SS ones from Tangerine Racing (just for good measure). 3. Replace the Bosch 050 distributor (and the Pertronics II) with the Mallory unilight distributor (tweaked with the proper advance springs) that I provided to you with the car. Also, set the timing and for good measure, adjust the valves (I haven’t touched either since I bought the car (3,000 miles). 4. Then if it still pops on deceleration, I may consider a different exhaust (or live with the popping like I did). Even though I like it, I don’t think the dual-outlet Triad exhaust was properly designed (I don’t think it provides enough back pressure ….just a guess). Tim Every time I've had popping on decel it's been an exhaust leak. Start there first as it's the easiest and cheapest solution up front. |
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