Sand blasting plugs?

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Re: Sand blasting plugs?

Post by jcisworthy » Sun Oct 01, 2017 4:27 am

There is no place like this place, so this must be the place
Freedom Village
https://www.freedomvillageusa.com/

http://www.rbjracing.tk

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Re: Sand blasting plugs?

Post by exhaustgases » Sun Oct 01, 2017 2:08 pm

As a youngster I worked at an airplane FBO and it was one of my jobs to clean the spark plugs using the standard aviation spark plug cleaner test unit, I think it was glass beads used to blast them.

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Re: Sand blasting plugs?

Post by hoffman900 » Sun Oct 01, 2017 2:18 pm

Are plugs really so expensive in the grand scheme of racing cars that you need to do this? :?
-Bob

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Re: Sand blasting plugs?

Post by Schurkey » Sun Oct 01, 2017 4:03 pm

Depends on how often the plugs foul.

If you're replacing plugs often, the expense adds up. Yes, the real solution is to fix the oil burning, and get the tune corrected. I wouldn't let blasting the plugs stand between me and a running engine, though.

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Re: Sand blasting plugs?

Post by Cougar5.0 » Mon Oct 02, 2017 2:23 pm

IMG_20171002_141919.jpg
I don't remember it being 12 volt powered, but this is the one I used back in the day...
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Re: Sand blasting plugs?

Post by Krooser » Tue Oct 03, 2017 6:34 am

When at Great Lakes Dragaway "tuning" my friends '52 Mercury (that he borrowed from his grandfather) my hot setup included a set of "rebuilt" spark plugs from Midwest Auto Supply...circa 1964.
Last place in the B-main is better than anyplace in the grandstands...

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Re: Sand blasting plugs?

Post by Schurkey » Tue Oct 03, 2017 2:30 pm

Krooser wrote:
Tue Oct 03, 2017 6:34 am
When at Great Lakes Dragaway "tuning" my friends '52 Mercury (that he borrowed from his grandfather) my hot setup included a set of "rebuilt" spark plugs from Midwest Auto Supply...circa 1964.
I remember K-Mart selling "rebuilt" plugs and "re-refined" motor oil when I was in High School.

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Re: Sand blasting plugs?

Post by Krooser » Tue Oct 03, 2017 3:41 pm

I used the 15 cent rerefined oil in my '57 Olds after both heads cracked and pumped oil on I the

combustion chambers... To the tune of 5 qts per day!
Last place in the B-main is better than anyplace in the grandstands...

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Re: Sand blasting plugs?

Post by exhaustgases » Tue Oct 03, 2017 6:51 pm

hoffman900 wrote:
Sun Oct 01, 2017 2:18 pm
Are plugs really so expensive in the grand scheme of racing cars that you need to do this? :?
In the aviation world they run from $30. to $122. per spark plug. Is it worth cleaning them?

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Re: Sand blasting plugs?

Post by Schurkey » Tue Oct 03, 2017 8:21 pm

exhaustgases wrote:
Tue Oct 03, 2017 6:51 pm
hoffman900 wrote:
Sun Oct 01, 2017 2:18 pm
Are plugs really so expensive in the grand scheme of racing cars that you need to do this? :?
In the aviation world they run from $30. to $122. per spark plug. Is it worth cleaning them?
...and two plugs in each cylinder, required by FAA regulations.

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Re: Sand blasting plugs?

Post by andyf » Thu Oct 05, 2017 12:02 am

Brand new NGK plugs are $1.97 each. Sand blasting plugs seems to be something that old men who collect tin foil and rubber bands would do. I know people like that, they save every paper bag from the grocery store and have boxes of old newspapers in their garage. Not my style but whatever turns your crank..........
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Re: Sand blasting plugs?

Post by mk e » Thu Oct 05, 2017 7:51 am

andyf wrote:
Thu Oct 05, 2017 12:02 am
Brand new NGK plugs are $1.97 each.
When the store is open and they are in stock. Also it takes about 5-10 minutes to blast and clean a set of plugs, the nearest store to me is 20 minutes one way, and they stock 2 of the plugs that fit my engine that needs 12....and ngk no longer makes them at all so the couple sets of nkgs I have are all there is. I can get autolite on-line in 3-4 days.

There are times when it makes sense to clean plugs
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Re: Sand blasting plugs?

Post by David Redszus » Thu Oct 05, 2017 11:25 am

There are times when it makes sense to clean plugs.
Yes, it does. Some of our Bosch racing plug sell for $25-$37 each and are seldom readily available.

But, a spark plug should retain its sharp electrode edges after cleaning. If sand or glass bead is used, those edges will become rounded. Since the object is carbon removal, a softer blasting material should be used that will not round off electrode edges.

Consider soda blasting, plastic media or walnut shells.

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Re: Sand blasting plugs?

Post by jeff swisher » Thu Oct 05, 2017 12:29 pm

I was going to say soda blast them.

Now I used to use a soft wire wheel on a bench grinder then I went to the air powered bag spark plug cleaner.
It left the media deep in the plug.
Take a totaled plug and blast it clean with that bag cleaner.. then blow it clean with air.

Now tap it on the table top and see how much media you tap out of it.

I now use a siphon feed parts cleaning gun with the pickup hose in a bucket of Hot water with baking soda in it that I get from the local grocery store.

Cleans plugs and carburetors and carb parts up very quickly without removing material..

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Re: Sand blasting plugs?

Post by andyf » Thu Oct 05, 2017 11:56 pm

Spark plugs cost $16 a set and last 50K miles or more if the engine is tuned correctly. So no, I don't bother to blast them. After using the same plugs for 5 years I just throw them away and replace them.
Andy F.
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