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SledgeHammer

01-04-2005 07:14 PM

What should spark plugs be gapped at?

I have a 468 with Merlin iron heads, 731 Crane Cam, 9.3 to 1 compression 750 Holley, MSD ignition and Eddie Marine Exhausts. The builder put MR43T AC plugs in it and set the timing at 35 degrees. I need to replace the plugs and I am not sure what they are supposed to be gapped at. Any advice?

Crazyhorse

01-04-2005 07:25 PM

Re: What should spark plugs be gapped at?

I gap mine at .035 but you'll probably get varying opinions on this subject.

articfriends

01-04-2005 09:55 PM

Re: What should spark plugs be gapped at?

.035 but with the msd and no blower you might see a slight power gain by opening them up .010 at a time,Smitty

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