I have NGK A6FS spark plugs fitted to my 2lt Pinto running on a Megajolt.

Can anyone advise the correct gap for the plugs?

many thanks

If you use a big gap although the ignition system will generate enough voltage if you use to big a gap the HT can flash over the outside of the plug and carbonize the plug lead boot. Best to stick to 0.9 mm (roughly 0.035".

I think the gap on my x-flow plugs is 0.8mm, which is what they're set to when they come out of their box.

Word of caution --- The xflo uses a spark plug that was the most common type in the 1960s it fitted something like 95% of cars on UK roads everthing from Minis and Imps to Jaguar..
The original Champion type number was N9Y (now RN9YC) and it was normally supplied gapped to suit most applications at 0.025" (0.625mm).
In the UK only Vauxhall and Ford (and a few Triumphs) used wider gaps 0.032" or 0.035"


You may some times find packs of 4 plugs sold in car accessory shop tailored to a particular application and gapped to suit but this is the exception rather than the rule.

[Edited on 22/5/08 by britishtrident]