Midget sprint and hillclimb car

News on my own Midget, the 1380 engine is now finished and fitted along with the new straight cut close ratio gearbox. This was all done within plenty of time for its rolling road appointment, more precisely, a week before... This meant spending several hours every evening driving the car up and down main roads at 3000rpm, trying to rack up 500+ miles to run everything in!
Luckily, I managed to do about 600 miles before it was due to be on the rollers, and the night before, I changed the running in oil and filter, and checked all the tappet clearances to make sure all was well.
As always, a rolling road session proved invaluable with a modified engine.
Encouragingly, going up several sizes on the chokes and main jets kept yielding more power, and a drop in air corrector size, and increase on the pump jets had everything running perfectly.

I use Interpro in Thornbury for my rolling road work. Dave Grithiths, the operator, is very knowledgeable, and their rolling road also measures the transmission loss - meaning some very accurate flywheel horse power figures can be calculated.
The final results? 107bhp at the flywheel (78 at the wheels) and 95lbsft of tourqe.
I'm extremely pleased with these figures, as the cylinder head is 100% my own work as is the assembly, and everything apart from the actual boring and grinding. Dave commented on how tractable the engine was, despite the very light bottom end, and fairly wild camshaft.
Since the rolling road, I've managed to put about 850 miles on the engine, of reasonably relaxed driving, and before the first sprint, I'll change the oil and filter again, this time using some high quality racing oil.