I’m still in a bit of a quandary about what happened to the chain and sprockets. I spent a while measuring it as accurately as I could tell and I think the driven sprocket was translated about 0.9mm to the right of where it should be and was at an angle of 0.3° to the drive sprocket. I’m not an expert at chains but that doesn’t sound horrendous.
Archive for the ‘Snetterton’ Category
Hmm, I think I’ve found a bit of a problem, which might just explain the problems I’ve been having with the new engine.
After the first outing at Snetterton I’d noticed that the chain had needed adjusting quite a lot. That seemed a bit odd but I didn’t think too much about it. However, I’d noticed that the same thing applied after the Silverstone race. At first I was wondering why the chain was stretching so much, or perhaps the sprocket was moving slightly. However, I think I’ve found the problem…
OK, I’m back. It’s been a while but we’ve been on holiday and I spent a week away at a conference which explains the lack of progress.
In fact, if I’m honest there isn’t really much to say anyway. After the Snetterton race I’d decided that I needed to sort the exhaust system out. I spent a while phoning around a few builders without any joy. I’d imagined that they’d all be twiddling their thumbs at this time of year. However, that appears to not be the case. So, after discussing it with Andy I thought I’d try something that I’ve been meaning to have an experiment with for a while. This is making my own exhaust. After all, it’s just a pipe and as Andy manages to make them out of a collection of mandrel bends, why can’t I?
Oh well, that didn’t quite work out as I intended. We went to Snetterton last weekend for the next race in the RGB championship. I was hopeful that the new engine would do something useful, although wary that the bodged around exhaust wasn’t really going to help. Also, the car hadn’t been been on a dyno which wasn’t going to help.
It’s definitely the finishing straight now, barring some horrific problem. First up is that I finished re-installing the transmission. As a consequence of careful design and planning, cough, it all fitted fine and will hopefully work OK.
Luckily, the gearchange lever on the ’08 engine is in almost exactly the same position as on the ’07 engine so no change was necessary here. You can see my super-long gearchange cable snaking around the engine in the photo here.
