Petrol engines Ignition advance curves

Above: Centrifugal advance curves only (for comparison)

Max Vacuum advance is quoted as 12~16 degrees for both DG and DJ (see below)

SteveW: Using a 2.1 DJ distributor for a 1.9 DG

I think that they are probably close enough and the engine is running a treat on LPG and a quick check on 98 ron seems Ok too.

HarryMann: Good to use the correct distributor if you have one, though the curves do look the same slope.

DG and DJ Ignition timing settings

1.9 DG	2.1 DJ
Static timing	5°±1° BTDC@900±50	10°±1° BTDC@800
Adv. check 1	0°-2°@1500	0°-2°@1050
Adv. check 2	10°-14°@2400	2°-6°@1300
Adv. check 3	24°-28°@4200	12°-16°@2400
Vacuum adv.	12°-16°	12°-16°

Timing a DH or DJ, technique.