spark plug gapping

[mk1matt]

Now i've fitted the electronic dizzie to my cross flow can i open the gaps up on my plugs?
Will it be an advantage?
And if so what gap?

Cheers in advance matt

[Graham]

leave the gaps alone!

a bigger gap produces a longer lasting higher voltage but weaker spark, smaller gap shorter fatter spark, some engines have a prefernce but in the main stick to std, unless you run fancy expensive small tipped plugs big gaps are asking for missfires.

with modern std emission lean running engines a long spark duration is probably a good thing, it give the mixture more change to burn, but away from that i cant see any good reason to open up plug gaps, it just put s the whole of the HT system under more load and your more likely to have caps rotors and leads break down.

the more mixture you have in compressed in a cylinder and the higher pressures be it either a high c/r or lots of turbo boost the more voltage it takes to fire the plug, which is why high power turbo and very high spec atmo engines run small plug gaps

[Roger Miller]

http://www.championsparkplugs.com/ch...nition+systems

set gap at 1mm

[Graham]

set gap at 1mm

why? never seen a gain on the dyno only missfires from too big a plug gap

[djaminhi]

some engines have a prefernce but in the main stick to std, unless you run fancy expensive small tipped plugs big gaps are asking for missfires.

so whats the preference for the x flow and pinto running an electronic dizzy;
and what gap do you reccomend for a pinto on electronic ignition

[Graham]

std!
0.6mm 0.025"

[mk1 gaz]

standard gap if you want your car to start in the morning