10-04-2024, 02:32 PM
Hi
I am renovating an Austin Sevon with an Ulster chassis and more recent ulster replica body. The car was in poor condition however it did start and run quite nicely. It doesn’t now! Nearing the completion of the renovation the engine was replaced .The engine is fitted with a 11/4” SU carb. I did a top side overhaul , re ground valves etc. I have though had enormous problem getting the car to run properly. I set up the ignition pretty accurately I think. First I couldn’t get the car to start at all but by advancing the ignition managed to get her to run. Despite all efforts though she would not accelerate when opening the throttle I undertook various adjustments to the SU (float height, centralise jet etc) and rechecked the ignition timing. Now when you start the engine it accelerates to almost maximum revs with the throttle fully closed!!! I have found by retarding the ignition somewhat the revs will drop somewhat. What could possibly be happening? Does anyone have any ideas?
Thanks
Martin Nash
I am renovating an Austin Sevon with an Ulster chassis and more recent ulster replica body. The car was in poor condition however it did start and run quite nicely. It doesn’t now! Nearing the completion of the renovation the engine was replaced .The engine is fitted with a 11/4” SU carb. I did a top side overhaul , re ground valves etc. I have though had enormous problem getting the car to run properly. I set up the ignition pretty accurately I think. First I couldn’t get the car to start at all but by advancing the ignition managed to get her to run. Despite all efforts though she would not accelerate when opening the throttle I undertook various adjustments to the SU (float height, centralise jet etc) and rechecked the ignition timing. Now when you start the engine it accelerates to almost maximum revs with the throttle fully closed!!! I have found by retarding the ignition somewhat the revs will drop somewhat. What could possibly be happening? Does anyone have any ideas?
Thanks
Martin Nash