09-08-2019, 12:48 AM
(This post was last modified: 09-08-2019, 12:51 AM by Tony Griffiths.)
Hello Tony, Hope the chummy is going well except for the heat problem. If you search “boiling petrol” on here you can see the mods I have done to sort it out. The next alteration was to turn the loop to horizontal instead of vertical as was suggested. Also the rubber wedge mod under the rear of the bonnet. Regards to Anne. Mike is doing his usual top quality job as mag editor. Cheers, Dave.
Hi Dave, thanks for your message. The Chummy is going very well indeed and starts from cold on the second swing of the handle - Mike was also rather surprised at the way it fled from his Appia on the way back from the Litton VSCC lunchtime meeting a few weeks ago. However, the old problem still exists, though it's surprisingly inconsistent, e.g. I went for a run the other evening and, within a few miles, it started spluttering and would only take part throttle. Having refuelled at Calver with 10 litres, the misfire cleared almost immediately and it ran up through Stoney Middleton Dale in top gear and down the straight into Wardlow Mires at an indicated 60. It then climbed the steep hill out of Wardlow in top - the last section, as it crested the rise, dropping to just 15 m.p.h. in top at full throttle and running cleanly. Work that one out! So, I've just bought a digital temperature gauge and plan to monitor some parameters (various temperature readings around the carb for example) to see if I can isolate a particular problem. I'll let you know when I have some results - if not answers....
Hi Dave, thanks for your message. The Chummy is going very well indeed and starts from cold on the second swing of the handle - Mike was also rather surprised at the way it fled from his Appia on the way back from the Litton VSCC lunchtime meeting a few weeks ago. However, the old problem still exists, though it's surprisingly inconsistent, e.g. I went for a run the other evening and, within a few miles, it started spluttering and would only take part throttle. Having refuelled at Calver with 10 litres, the misfire cleared almost immediately and it ran up through Stoney Middleton Dale in top gear and down the straight into Wardlow Mires at an indicated 60. It then climbed the steep hill out of Wardlow in top - the last section, as it crested the rise, dropping to just 15 m.p.h. in top at full throttle and running cleanly. Work that one out! So, I've just bought a digital temperature gauge and plan to monitor some parameters (various temperature readings around the carb for example) to see if I can isolate a particular problem. I'll let you know when I have some results - if not answers....