Set off for Bowes show yesterday in Durham. I have done plenty to the car over the winter and to be honest I was rushing to get it ready in time. The last thing I did was rebuild the carbs, fitted the lot; shafts, bushes, throttle discs etc.
Rebuilt the rear carb first and all went well. Came to do the front carb and the needle valve supplied was different to the one fitted ( see photo). Both carbs originally had the lower type needle valve fitted; it has a spring loaded pin on the left, I was supplied with one bottom and one top. Also I noticed that the hole in the seat was bigger than the one taken out. I assumed the parts where supplied incorrectly and fitted the new seat with one of the old needle valves. Nothing in the manual to the contrary.
Over the preceding week to the Bowes show I refitted, balanced and tuned the carbs. The car was running really well; I went for a couple of short runs and everything was fine.
Come the morning of the show set off on the M60 did about 7 miles and turned off onto the M61 heading north towards the M6 car running very well indeed. As I decelerated to negotiate the curved slip road there was a strong smell of petrol so I pulled over. Opened the bonnet and fuel was fizzing on the exhaust down pipe; Harvey you are quite correct it doesn't just burst into flames! However when I posted about this last week I didn't expect to have the problem myself so soon!
By this time Happy Days had answered my distress call and had pulled onto the slip road behind me. We talked about it and decided to tap the carb to try and free it off which to my amazement worked. We carried on probably about another 10-15 miles close to Preston. Again slowing down to negotiate a tight bend the petrol smell returned. This time it was impossible tap free so I gave up and had the car recovered.
I contacted the supplier who kept talking about V8's but eventually we got the correct part numbers; turns out I had the right kits. So he went off to find out whether the kits had been made up incorrectly and said that the two carbs should have different needle valves fitted. They are saying front carb has the brass triangular needle valve with large seat and the rear carb has the square one with spring loaded pin and small seat.
Can anyone confirm if the needles and seats are different in the front and rear carbs ? As I said mine had smaller seats and the same needle valve fitted in both.
Also why would the carb only flood when decelerating after a fast run ?
cheers
pat
Rebuilt the rear carb first and all went well. Came to do the front carb and the needle valve supplied was different to the one fitted ( see photo). Both carbs originally had the lower type needle valve fitted; it has a spring loaded pin on the left, I was supplied with one bottom and one top. Also I noticed that the hole in the seat was bigger than the one taken out. I assumed the parts where supplied incorrectly and fitted the new seat with one of the old needle valves. Nothing in the manual to the contrary.
Over the preceding week to the Bowes show I refitted, balanced and tuned the carbs. The car was running really well; I went for a couple of short runs and everything was fine.
Come the morning of the show set off on the M60 did about 7 miles and turned off onto the M61 heading north towards the M6 car running very well indeed. As I decelerated to negotiate the curved slip road there was a strong smell of petrol so I pulled over. Opened the bonnet and fuel was fizzing on the exhaust down pipe; Harvey you are quite correct it doesn't just burst into flames! However when I posted about this last week I didn't expect to have the problem myself so soon!
By this time Happy Days had answered my distress call and had pulled onto the slip road behind me. We talked about it and decided to tap the carb to try and free it off which to my amazement worked. We carried on probably about another 10-15 miles close to Preston. Again slowing down to negotiate a tight bend the petrol smell returned. This time it was impossible tap free so I gave up and had the car recovered.
I contacted the supplier who kept talking about V8's but eventually we got the correct part numbers; turns out I had the right kits. So he went off to find out whether the kits had been made up incorrectly and said that the two carbs should have different needle valves fitted. They are saying front carb has the brass triangular needle valve with large seat and the rear carb has the square one with spring loaded pin and small seat.
Can anyone confirm if the needles and seats are different in the front and rear carbs ? As I said mine had smaller seats and the same needle valve fitted in both.
Also why would the carb only flood when decelerating after a fast run ?
cheers
pat
