15-04-2023, 09:35 PM
Old Dave, I use Accuspark AA77C on my 1933 Austin 10. However being three electrode design there is no way to set a gap. I have always worried about this as the gap essentially sets the dwell angle.
The car runs okay and I can’t detect any loss of power versus the NGK AB-6. Maybe Austin didn’t consider DA back in the day. Reason for the change was I got two batches of dud AB-6,s…. I think I got some Chinese knock offs although the supplier denied it.
I also run AA77C in my side valve Ariel VB600 and this bike runs okay as well.
I am considering using a plug adapter to take the plug hole down to 14mm. Not too expensive and plenty of plug choice at this size.
Before I used on the A10 I took the head off , fitted a AA77C to make sure the electrode didn’t project too far.
I can’t find the specs on the Accuspark web site now, but I recall the projected length was 1/2 inch which is close to AB-6 at 7/16 inch
Cheers
Gary
Auckland
The car runs okay and I can’t detect any loss of power versus the NGK AB-6. Maybe Austin didn’t consider DA back in the day. Reason for the change was I got two batches of dud AB-6,s…. I think I got some Chinese knock offs although the supplier denied it.
I also run AA77C in my side valve Ariel VB600 and this bike runs okay as well.
I am considering using a plug adapter to take the plug hole down to 14mm. Not too expensive and plenty of plug choice at this size.
Before I used on the A10 I took the head off , fitted a AA77C to make sure the electrode didn’t project too far.
I can’t find the specs on the Accuspark web site now, but I recall the projected length was 1/2 inch which is close to AB-6 at 7/16 inch
Cheers
Gary
Auckland