Sand blasting plugs?

General engine tech -- Drag Racing to Circle Track

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jeff swisher
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Re: Sand blasting plugs?

Post by jeff swisher » Fri Oct 06, 2017 7:42 am

I did an experiment back in the 1980's through the 1990's.
I had an 82 ford mustang inline 6 cylinder carbureted NO OD it had an automatic C5 trans.
27 MPG is what it got city was 24.On a bad day.

I delivered Pizza with it and also hauled scrap iron and mowed 75 yards a month with it.
To say the least i put miles on this car.
I retired it with 376,000 miles..The spot welds came out of the floor pan and sway bar mounts..Of course i fixed that a couple times.. it just fell apart.

The engine trans and rear end were fine..I gave them to a buddy and kept the front clip for another friend and rack and pinion off of it went onto my 78 Nova.

SPAEK PLUGS were original Motorcraft..The experiment was to see how long they would last.
I would clean and reuse them..Never failed a single plug.

I will say driving in the winter months was a bear. It no longer had enough friction to warm the coolant in the engine. Cranking compression was 200 PSI

I had a ford flex fan on it and you could turn the engine over by turning the fan with your pinky finger.
I installed a single core radiator and placed cardboard in front of it still on a sleeting day you could not warm the windsheild.
I would bend the fan blades almost straight in the winter time. Not much help.

Love those engines.

mk e
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Re: Sand blasting plugs?

Post by mk e » Fri Oct 06, 2017 9:19 am

andyf wrote:
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.
Plus they are pretty bunt at that point, trash.

But I has just having a problem that turned out to be a combination o f an error I made on't the way the way applied the calculated dwell time and a second error in understanding exactly what a set of semi-smart coils were during.....and I gas fouled the plugs 10 or 12 times before I found and sorted it. Cleaning them saved me about $500 and a lot of lost time. Once the problem was fix I replaced them with new, plated, sharp edge plugs.

There are times when cleaning plugs makes sense, there are times when it doesn't.
Mark
Mechanical Engineer

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