Spark plug comparisons

[I Know Something]

Whatcha guys think after watching this? I was surprised.

 

[Warped5]

Not a chainsaw to be seen.

NEXT!

 

[Terry Syd]

I'd bet the Pulstar would be the best plug for starting an engine. The capacitor concept would make it more like a capacitor discharge ignition.

 

[Terry Syd]

Here's some dyno testing from Pulstar. Any improvement appears to be relative to the existing ignition system.

https://pulstar.com/how-it-works/tests/dyno-testing/

 

[I Know Something]

Always neat to read about gains from such simple things.

 

[legdelimber]

Kind of makes me wonder if it's just working like a booster gap.

I once saw a mower, with a soot fouled spark plug, that would not crank if the spark plug wire was clipped onto the plug tip.
But it would crank with the wire off of the plug.

What had happened was the customer pulled the plug wire off to handle the mower while loading it into his car trunk.
The mower was unloaded and someone pulled the rope to see what was up.
Mower cranked and revved rather well.
Customer looked a bit perturbed at having taken a day off from work to bring it in and now it runs?

Then someone noticed the plug wire was still off but just touching the tip of the plug, due to that shape memory effect of the rubber insulation.

Now the Interesting part.....
Seems that a booster gap of about 3/4 inch got the spark to jump the plug gap, instead of the carbon/soot just bleeding the spark down the side of the center insulator.

Mowers had manual chokes back then.
You pushed the throttle lever to the end of its travel and that closed the choke shutter.
Customer had been pushing/leaving it a little bit past the detent that indicated full throttle but not fully choked yet.
New spark plug and a bit of customer enlightenment solved all issues.

But keep in mind this was the in the era of points & condenser ignitions and (in good condition) they will fire a pretty nasty spark plug.
Beauty of them was, You had to work hard to wet foul a plug , to beyond starting, with them.