30thou is about 0,8mm which is to narrow for electronic ignition with
sports coil. It will not do any harm but the spark will not be optimal.
I prefer 1-1,2mm/40-45thou on my Petronix for a fatter spark.
Kees Oudesluijs
NL
Op 10-6-2013 14:37, Alan Bromfield schreef:
> Phew.
> I thought I was going crazy. I think in imperial 'coz I'm old and
> 1.2mm instinctively just felt BIG!
> Simon - go to around 30thou (0.030") for the sports coil with 123.
> Nice fat spark and very clean firing.
>
>
> On 10/06/2013, lists <lists@brits-n-pieces.com> wrote:
>> Hi Simon,
>>
>> standard plug gap is more like .7 or .8 mm. I wouldn't widen the gap to more
>> than 1 mm with 123ignition.
>>
>> Regards
>>
>> Eric
>> www.brits-n-pieces.com
>>
>>
>>
>> I have a BT7 MkII with 123Ignition & a Lucas Sports coil.
>>
>> On the engine side it has 3 HD6s, a 6 branch big bore exhaust, and a Denis
>> Welch fast road cam.
>>
>>
>>
>> What spark plug gaps do you experts suggest? (I'll be running NGK's BP 6ES
>> plugs).
>>
>> Thanks,
>>
>> Simon
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