silly me and the millions and millions of others who have been doing it all wrong since the early 1900s.

You can ABSOLUTELY use the 2 that willwren says you should never use.

Sure, and for the L67 that has dropped a pulley size like the one in question, posted in the PERFORMANCE section, it makes all kinds of sense to do a generic redneck gap job, doesn't it?

As much as a .005" error can cause you problems down the road. Get it right the first time and forget it.

Millions and millions of people could care less about a .005" error. We do.

lol, you are you actually trying to say using a feeler gauge will end up with as much as a .005 error?

.020 + .035 sounds like .055 to me

Redneck? thats not very nice just because someone disagrees with you. Whats next kicking me out?

I said 'redneck gapper' in reference to that tool.

Find me a person serious about performance that actually uses feeler gauges instead of wire or pin gappers.

The shape of the electrode will cause a 'high spot' to offset a flat feeler gauge causing a bad gap.

A wire or pin gapper will 'find' that high spot. You'll be able to feel it.

Kicking you out? That depends on your answer to my PM after you showed some serious attitude and disrespect to my Co-Admin.

Back on topic. Accurate measurements of a flat surface are best done with a round measurement tool. The opposite is true as well. Accurately measuring a round surface is best done with two flats.

Compare the difference between a micrometer and a set of calipers and what they're used for and you'll actually understand it.

Never measure two flats with a flat measurment tool.

1- Me and millions of others that dont blindly follow what you say

2- why is the surface of a micrometer flat?

1. Obviously not. At least not like normal people.

2. The surface of a micrometer is intentionally flate so that the round object you measure is only touching two specific points.

Are you saying a mic is used only to measure round objects?

actually that is not true (especially the "flate" part)

thank you will and mark for the information. it was very helpful.

the debate was actually very informative, and i feel i learned more from it than i would have otherwise. for that i thank both of you.

Willwren isn't just trying to show off his know-how either. He'* right. As I said, 5 thou can mean a 2000 volt difference in firing line (and related loss of spark line) on the scope at idle, and more than 3 times that when loaded up.

Modder is a formerly (recently) banned member that showed much disrespect and attitude to my co-admin, caused multiple problem posts causing much frustration amongst our Gearheads, and re-joined the Forum for the sole purpose of showing how we're all wrong about gapping, Bosch Platinums, and everything else under the sun that he is the expert on because he read it.

I suggest using practical experience from our own knowledge base than some schmuck from Reno that walks in here and thinks 5 years, many gearheads, and 8000 member'* experiences are overwhelmed by his own superior intellect.