Best spark plug gapping tool? [Archive]

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Brian Callahan

12-03-2008, 09:44:45 AM

What is the best spark plug gapping tool?

I need to increase the gaps on some plugs a LOT (>.010) and I need to keep the electrodes square with each other. I can do it by hand, but I need to develop a process for an unskilled person to do it and it needs to be dead nuts and repeatable. This is for a mass production situation, but with not enough volume to get NGK to make custom plugs for me.

COPO

12-03-2008, 10:08:18 AM

Faster than what I use.
http://static.summitracing.com/global/images/prod/large/sum-900313_w.jpg

http://store.summitracing.com/partdetail.asp?part=sum-900313

http://images.europeancarweb.com/auto_tools/0210ec_tool01_z.jpg
http://www.europeancarweb.com/auto_tools/0210ec_tool/index.html

deputyrob

12-03-2008, 07:29:17 PM

i've never seen a gapping tool like that....interesting. i just use the round feeler gauge deal with the hooks for the gap sizes and the prongs to do the gapping

COPO

12-03-2008, 09:25:55 PM

I use these:

http://www.nastyz28.com/~copo/plug gappers.jpg

deputyrob

12-03-2008, 09:39:37 PM

oh man...i like those AC gappers...where do it get one?

andymiller

12-03-2008, 10:47:45 PM

https://www.expeditionexchange.com/tools/ullman001%20055.jpg

I've used this for 15 yrs

Bikefixr

12-04-2008, 12:21:29 AM

I use a nickel.

COPO

12-04-2008, 12:45:09 AM

oh man...i like those AC gappers...where do it get one?

From GM. I think back in the 60's or 70's. Not sure if they still sell them.

muscl car

12-04-2008, 05:47:21 AM

been using this style gap gauge since the late 70's

https://www.expeditionexchange.com/tools/ullman001%20055.jpg

hot72rod

12-04-2008, 08:05:30 AM

I use a set of feeler gauges.

Twisted_Metal

12-04-2008, 12:35:08 PM

I use a nickel.

And I thought I was a cheap bastidge..... :rolleyes:
A nickel is about .070.... Too thick for most plugs.

A well-worn DIME is very close to .045. ;)

(BTW..... You Canadians can use a dime. It's .047 thick.)

BigBlock73

12-04-2008, 01:20:59 PM

When I had a VW Bug, I would gap the points with a match book
It would run great

1Awsum79Z28

12-11-2008, 02:11:08 AM

Ive been looking at the Accel Shorty Plug,due to my recent instalation of headers.What i dont know is..The Accel plugs are gapped at .035 or .038...not sure. Do these plugs have to stay at .035/.038/ Or can i re-gap them to the proper .045? Thanks..

andymiller

12-11-2008, 07:02:48 AM

I have my shorty's gapped to .045

rhead007

12-13-2008, 03:03:44 PM

i use one like any has had it forever

buy e3 plugs no gap necesary 15 hp gain on dyno

muscl car

12-13-2008, 06:10:17 PM