Modify Spark Plug For More Power?

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[drenewoo]

Idk why people write so much hate to you. I have a 50cc and I am just like you, I like trying homemade things to make my moped better. I love your videos!

[jaredcollins]

Mess with the carb a little bit. That screw on the side where you can change the idle, idle up a tad and try that

[johncunningham]

Side gapping is used in Racing . High Fuel Ratios and High temperatures .
Side gap plugs dissipate heat from themselves quicker to avoid overheating and Melting the Electrodes .
The Plugs do NOT make more Power . Even a High-end MSD ignition doesn't . What happens is MISFIRES are eliminated .

[gueto]

Side spark in racing has nothing to do with the ground terminal blocking the combustion. When the spark "dances" it changes length and there fore temp. Racing calls for consistency of high performance precision at the cost of longevity. You electrode and ground post are going to concentrate all of the wear in one "laser" spot increasing gap wear quickly out of optimal range. Not an issue if you change them after every race.

[rotorblade]

the steady spark is because it connects the closest points. with the original the surfaces are parallel and spark can form anywhere between the parallel surfaces but will have the same power every time. With the side gap the location of the spark is constant and will wear the side of the electrode then the gap will increase. It is possible the flame will travel slightly better because it can spread in all directions initially but hard to tell if it helps without clear tests

[eyeslo]

Changing the gear ratio is the best and easiest way to make a small cc bike feel more powerful.

[calthorp]

many years ago I had a single cylinder 185 suzuki 2 stroke that had 2 spark plugs in the head so if one fouled you could swap the lead to the other one for a fresh plug. But what I did was add another coil & lead to the second plug so both were firing & it made a huge difference way more low down power & always started so easy.

[Bigeu]

3:13 .... i did the same back in the mid 90s for a street/strip hot rod engine i had built. I filed back the ground electrode while keeping it square so it uncovered just half the center electrode. Im not sure if it made any difference power wise, but it most certainly improved throttle response.

[marktarascio]

The ignition has to be able to create the spark longer too. I used side gapped plugs in 2 stroke engines turning 20, 000 rpm. But the pumper carbs had externally adjustable low and high speed jets .The plugs were alot foul resistant in 2 strokes for sure

[LazyMountainMotors]

Whatever amount of hate you get, props to you for actually messing around with engines and testing things in a time when everyone is glued to their screens and everyone is dumbing down. Props to you for learning the hard way. Thanks for being that guy that’s keeping wrenching alive.

[truethought]

Well put, I was in mechanics for years, now retired. But, the way you explained how the spark, can ignite the fuel
quicker, makes perfect sense !!! The quicker the burn, the more force is gained. Excellent. 👍
PS, put a very small bit of Coper-ease on your Plug threads, this saves wear on the Alloy threads!

[fm]

I've been grinding my spark plugs since the 1960s, except the Iridium plugs. [Dodge D-50 2.6 5 spd.]
I VASCAR tested 1/8 mile of 3 runs (averaged) & went from 14.25 to 13.75 seconds. My mpg's also went up.
Granted it's a sort-a small amount but it cost ZERO. __ CHEERS 😉

[johnlambert]

Good info dude! Now do research on indexing spark plugs. If you index them, you'll get the electrode facing directly at the fuel air mix when it enters the engine making even more power

[gpandy]

They prob side gapped plugs too run shit loads more fuel without fouling plugs guessing

[bjorn]

leave the spark plug alone, if the bike is not meant to have side spark spark plugs then there is a chance the engine will run hotter and you will burn your valves just like running a lean tune

[Twed]

On a small bike engine with, let’s be fair, a small horsepower figure, there’s never going to be an magical and noticeable gain from a spark plug. It’s either going to work or not. What you’d be better doing is playing around with the timing of the spark and seeing what you lose or gain across your power curve. But if you love that bike and enjoy tinkering, drop in a larger lump. 👍

[westcoast]

Mazda rotary engines use a triple ground. I have felt a change in performance using those years ago. They are more of a side shooter.

[theblackhand]

Your start in the first few second was ok. But straight away you cut away to much.
The tip of the ground electrode should be rounded off. No edges. Then the tip should begin above the center line of the center electrode. Thus where the ground tip is oval shaped because you rounded it off.
When the ground electrode is past the center electrode it keeps its original shape.
A secondish thing you could try is to move the newly shape tip somewhat away from the center of the center core. But be careful. My thoughts here are that you still need a reasonable gap to let the engine perform well. An over stretched spark is a weak spark.
A rounded off tip, round or oval shaped, starting above the center of the center electrode forces the spark to one point: the rounded tip and the bit of ground what lies just behind the rounded off tip.
Hopefully this will help you out.

[shammon]

I did this to my 1977 Goldwing but only a small cut off not large. on the 4 plugs. Superb it runs way better

[jakemurphy]

Different spark plug gaps subtlety alter the timing of the spark. And different timing affects power output. That's a fact.