ok, i did a little searching and really turned up nothing at all...

i have a JDM ITR engine in my car..and i'm swapping out plugs for an upcoming dyno/cam install/comparions test.

i got some 3924's....and just don't knwo what to gap them at...

i have 11.1:1...........................

some say .051, some say .045..and yet others say .035...so which is it?
stock ignition

 

I'd say start at .040 and work your way down if you notice any mis-fire
Also try using an NGK ZFR7F-11 or a BKR7E if you can

 

.038

 

for my low compression, i just stuck it at .40

does really well, and feels much smoother

 

So JDM ITRs are supposed to have a 7 heat index?

 

There is alot of trail\error with spark plugs.

You could start with a 1.1mm Pre-Gap and work down if any mis-firing.

Suprdave

 

we MIGHT play with gap on the dyno, if we have some spare time on hand. But i'm pretty sure it's been solved allready for when i get the next bottom end.

thanks guys