dalejr8ls1

iTrader: (1)

Got NGK tr55's iridiums and they came with .06 gap, can I just carefully push the tip down slightly down to .050 and measure with a digital caliper? I've searched and .050 seems to be the way to go for heads/cam setup...

Beast96Z

iTrader: (21)

Yea, you can set the gap to whatever you want.

orangeapeel

iTrader: (18)

Bend might be pushing it. LOL

Ferocity02

iTrader: (60)

Spend the $5 on a set of feeler gauges to measure the gap. That way you can put .05" of the feeler gauge in the spark plug and push down the tip until it hits the feeler gauge, boom done. Much faster and more accurate than a dial caliper.

TheBlurLS1

iTrader: (8)

Just give it a little tappy, tap tap tap-a-roo.......

Don't go to far though, you're not really supossed to gap the iridiums open due to the ability to damage the tiny electrode.

napamike

Gapping platnium or iridium plugs is always risky. Your best bet is to gently push down on the plug and use a quality feeler gauge to check the gap. just be very carful not to force the gauge otherwise you will knock off the tip.

orangeapeel

iTrader: (18)

Hey Bill Nye, I didn't know that you were a member on tech!?

TheBlurLS1

iTrader: (8)

Hells yeah....

VA2001SS

NGK recommends a maximum of +/-.008 gap change from the NGK factory gap setting.

Camaro99SS

iTrader: (4)

Not to hijack the thread or anything, but I'm on my 2nd set of TR-55 coppers and this latest set came with a gap of .055? The last set had a .060" gap as measured by the same gapping tool, and I ended up going to .055. Needless to say, I didn't bother changing the gap on these new plugs...

Jason

staringback05

iTrader: (8)

i thought most came with the .055 gap

orangeapeel

iTrader: (18)

Most do.