Chris Bacon wrote:
The Natural Philosopher wrote:
Quite right. The old A series high comp engines in midgets and the
like worked better on 5 star, especially once you got them to breathe
a bit better and sorted out the timing a bit.

They WERE designed to work on 5 star. Especially once I had finsished
with em.

OK, you say you've done some performance tuning on "A" series engines.
What did this comprise of. Be specific. I don't think you know what
you are talking about, so here's a chance to redeem yourself.

I never intended to, but the engine I was about to install fell over and
broke its exhaust manifold and an LCB after market was cheaper than I
could find a cast iron one.

I had bought that one off some ad in 'Motoring news' so it MIGHT have
been a little hotted up...but it ran up on standard needles and timing
so it can't have been TOO modified if at all.

All I can say is that it ran better in damp cool weather, and on 5 star.
I didn't set it up for that - being flat broke at the time it ran 4 star
mainly. No idea about fuel consumption, just that it wasn't so hard on
ignition. And developed more power.