Thanks Roger. Here's more pieces to the puzzle. Owner put on the original fuel pump and no more overflow! Yay! The new pump we measured at 3-3 1/2 lbs. which apparently caused the overflow. Owner then drove the car and it was fairly smooth to ~3200rpms at which point it started stumbling so he parked it.
When I got there, we determined TDC and noted the rotor was firing #1 (Lucas Electronic) as the sensor was opposite the pick-up(not sure what the nomenclature is as I'm a points/condensor man myself). So we set it to 10*BTDC and started the engine. I then reset the mixture and synched the carbs. It ran well and the engine revved smoothly so we took it for a drive. It started stumbling and backfiring ~ 4000rpms but was really good up to that point. So we rotated the distributor a bit and I got it up to 5200 before it stumbled. But once it started to stumble the 'stumble limit' (not a character from Harry Potter) became lower until we were around 4000 again. The pinch bolt is tight so that didn't slip and we drew an index line so we could check for that. The stumble or miss almost has me wondering about the ignition or dizzy advance. How does one check to see if the centrifugal or vacuum advance is working? But most important is what is causing the problem at higher rpms?? We're getting closer!! I really appreciate your help and the what a great car!! Dave Burlington WI Roger Elliott wrote: > Hi David, > > Thanks for the info. > 10 BTDC seems to be the standard timing on the British version that > had a higher compression ratio than the US. So I think that is what I > would try. > > Roger _______________________________________________ Spitfires mailing list [email protected] http://autox.team.net/mailman/listinfo/spitfires
