1929 Model 19 timing

Sorry, I can't answer your question. However, regarding ignition timing, remember that petrol, in the 20's & early 30's, was of a much lower octane rating than modern fuel ( probably the equivalent of 70 octane). You will probably have to experiment a little to get the best running. Hope I am not teaching you to suck eggs!

Previously Andrew Jarrett wrote:

Hi All,

I have just purchased a 1929 model 19 and wanted to check the engine data I have in an old Norton maintenance book.

1 Valve Timing inlet 5/16 BTDC and exhaust 5/16 ATDC

2 Ignition timing BTDC fully advanced 5/8

3 Tappet clearance Cold inlet/outlet .003

Can anybody tell the flywheel endfloat measurement.

Thanks in advance

Cheers

Andy

.005" - .010" should be ok for crank end float

Previously Andrew Jarrett wrote:

Hi All,

I have just purchased a 1929 model 19 and wanted to check the engine data I have in an old Norton maintenance book.

1 Valve Timing inlet 5/16 BTDC and exhaust 5/16 ATDC

2 Ignition timing BTDC fully advanced 5/8

3 Tappet clearance Cold inlet/outlet .003

Can anybody tell the flywheel endfloat measurement.

Thanks in advance

Cheers

Andy

Andy,

My 1930 Norton Maintenance manual (and 1930 haycraft "Book of the Norton") lists the following data for a 588cc OHV:

Ex open: 7/8" (55-60 degrees) before bottom dead centre

Ex closes: 5/16" (25-30 deg) after top dead centre

In opens: 5/16" (25 - 30deg) before top dead centre

In closes: 1/2" (40 - 45 deg) after bottom dead centre

Tappet clearance: 0.003" on both inlet and exhaust

Ignition: 5/8" (35 - 40 deg) beore top dead centre fully advanced

(however with modern petrol I would be testing this and possibly slightly retarding ignition)

Flywheel end float: 0.005 - 0.008"

regards