sparkplug gap?
 

bbc, 3300lbs, auto w/brake, msd 7AL. NGK G groove #UR6GP. we've run them out of the box with no issues @ .040" gap. time for a new set, possiably to a .050" gap? may i have your opinion/experiance please...thanks.

Re: sparkplug gap?
 

Remember that the larger the gap, the more important that the condition of the wires, cap, rotor. Since the performance benefit would be negligible, I would leave them at .040". My .02.

Re: sparkplug gap?
 

thanks jim. makes sence what your saying. i ended up talking to NGK and found that the g-groove plug is their platinum unit.....not a race plug. we've stepped up to their V POWER race plug, a touch hotter one too. the .040" gap is fine also. good cooperation from the manufacturer.

Re: sparkplug gap?
 

don't mean to highjack thread but why does my 454 motorhome call for .060 gap? seems a lot to me... i run racecar at .045.

Re: sparkplug gap?
 

We're not running points anymore guys.......next time you're on the dyno with the latest ignitions, especially Digitals, try .020 - .025.(Or just put them in outta the box.) You just might like it. Ask Chuck Beach what happened when we closed his up. JB.

Re: sparkplug gap?
 

Chuck what happened when you closed the gap in your plugs?

Re: sparkplug gap?
 

something else to remember the wider the gap the more power it takes to fire the plug---also if ya run in a hot humid area ya just
might try .005 less gap just might help some--Comp

Re: sparkplug gap?
 

Does it make a differnece if you have a dish piston?

Re: sparkplug gap?
 

If he closed them up from .035 -.040 to something less and it helped,. then he had a problem elsewhere.