i just did the search and came up with a page of results of threads and no solid answers about how you decide which gap to use-

i just bought a set of ngk bkr7e's for my '00 civic si, its turbo'd with a revhard 2c kit, running 7/8psi- whats a proper gap for that? the only ignition aspect ive switched so far are vitek 8.5mm wires...im reading all over mixed answers between .025-.035 but how the hell do you really know whats best for your car and where should i start out? help!!

 

stock ignition...
gap at 30 and be done. works great. change with oil changes.
if you have msd or other ignition, gap at 35-40

25 is very narrow gap.

 

actrually best bet is to try diff gaps until tyou get the right feel
i can tell you now mine wouldnt boost at all over 32 gap and i have upgraded igntion,all msd stuff, actually ill prob nede a tighter gap.

 

gap them to a half inch

 

" gap them to a half inch "


bro your so cool- its people like you that make this board go round

 

change plus every oil change?? arent you supposed to change oil every like 2000 miles with turbo applications?