Aldon yellow 100ayp

[Birdy9182]

Many thanks guys

[ianh1968]

That's a handy link from SurfBlue...

I'd carry out an additional check, though...
(Or at least use a slightly modified version of that procedure).

As it says, take out the plugs, or at minimum, disconnect the HT leads because
you don't want the engine to fire and run you over if you've got it in gear.

Wind the engine back to say, 15 degrees before TDC - The lamp should be ON
at this point as the points will be closed and the coil is being charged.

VERY slowly, nudge the engine over until the lamp JUST GOES OUT.
(This is when your spark will happen).

Observe where the flywheel/pulley timing marks are at this exact moment
when the lamp GOES OUT. To a minimal extent, this will take up some of the backlash
in the system as the shaft will at least be being turned in the correct direction as
opposed to "wiggling the distributor until the lamp flickers"...

So, although this is classed as being a "static" method, the engine is in fact doing
about 0.0000001RPM during the test.

Many of the historic timing values are quoted as "static" as this was a time when
most people did not have fancy strobe lamps. Most people could, however, cobble
together a crude test lamp from a couple of bits of wire and a generic 12v bulb.

[carbon]

The 'lamp method' may be crude, but it's still one of the most accurate ways of setting engine timing.

If you do this with distributor cap off you can also check the slack in the distributor drive is taken up at the point where the lamp goes out by (gently) turning the rotor arm clockwise.

[Thee Adder]

I Had a similar spec of engine back in the 80's and that ran great with an Aldon Yellow, 84BHP at the wheels on Chris Asquith's rolling road -

74mm Powermax pistons
10.7:1 Compression ratio
Avonbar 36x31 Road/Rally Head
Offset bushed Rockers
Piper 285/2 Cam
Maniflow LCB
RC40

[Birdy9182]

A lot of good info many thanks it will help me and others a lot