Rolling Road - Follow - Up

After the not-too-successful rolling road session, I had a friend round and we tried to work out what was going on. One of the things suggested was to make sure the timing mark was at TDC so we pulled the plugs out and turned the engine over by hand. As I rotated the harmonic balancer we noticed (with associated groan of realisation) that there are two white marks, we were using the wrong one! I don't know what the second mark equated to, but it explains why the timing was all messed up. We started from scratch and verified TDC and scratched off the second mark on the damper.

We set that straight (after having to go out and buy a new timing light as my ebay one was broken after only a couple of uses). Went out for a drive and surprise surprise, no detonation. The car sounds better, pulls harder and runs smoother at low revs although its still far from perfect below 2000rpm. There's also still a bit of a bog when going for full throttle from low revs, possibly the jet change we made on the RR wasn't necessary now we've got the timing right.

Now that's sorted I'm booked in for another RR session in 2 weeks to eliminate the bog and try and recheck  the idle mixture.

We drove from Cambridge to Letchworth to visit a friend and it was extremely civilised. We used a quarter of a tank which is about 18 litres and did just over 70 miles which equals 17.6mpg, which is frankly astounding!