robgraham wrote:
On 18 Mar, 16:04, Roger Hunt wrote:
Clint Sharp wrote

In message , "Dave Plowman (News)"
writes
Trouble is, according to the classic car mags, the jury's out on whether
they actually work - unless they contain lead which most don't. An old
engine builds up a coating of lead and this can last for a long time after
the source is removed.
You can still buy leaded fuel though. The places that sell it are few
and far between but they do exist.
http://www.leadedpetrol.co.uk/
--
Roger Hunt

Quote from this website :-

"That means you can advance the timing and raise the compression ratio
or turbo boost higher with leaded petrol than is possible with
unleaded or LRP, without detonation. That equals more power from your
engine. If you are involved in racing where seconds count, that could
be the edge you are looking for."

I'm driving a 50 year old single cylinder cultivator !! Do I need to
add anything more ?

No. Run it on unleaded like everyine else does..and maybe retime it
slightly.

Those old engines run seriously rich anyway, which is anti-knocking in
its own right,. they run low comp, and if the exhaust valve eats burn in
another 50 years, there will still be enough metal in them to grind again.


Rob