what should the gap be for mvvs 26 spark plug?

[f3martin]

OK
So, what should the gap be on an mvvs 26 spark plug?

Many thanks
Martin

[Ramz]

Do you have the original plug that came with it? If you do, just go from that one.

[f3martin]

thats the problem, it seems to be a big gap, it has had a few litres through it, and just wanted to check it

[dick hanson]

.025" is fine
( twenty five thousandths)

[GmanBill]

If you are running synth and 92 or 97 octane through it like I am (I am on a pipe too), I run mine at a .032.

[adrian]

1 x axo blade thickness

[dick hanson]

The spark plug gap is NOT a fixed magic number.
Onthe engine in question, aprox .025 is a good all around number
but what the hell -screw around with it and see if you find yours runs better or worse at different gaps
then - explain why the different gaps make an improvement - or reduce power .
don't guess-- explain it .

[ifixairplanes]

	Quote: Originally Posted by dick hanson
	...explain why the different gaps make an improvement - or reduce power . don't guess-- explain it .

You sound like my 8th grade science teacher!!

[dick hanson]

Is it old fashioned to actually figure things out?
I hope not .

[f3martin]

Ok guys, a friend just bought a new mvvs 26, the original gap is, wait for it, its coming, any second, please dont ask me to explain it teacher hanson, I havnt studied, the answer is: .51 mm

[dick hanson]

no need to study - that is .020"
I mentioned .025"
.003 " is about the thickness of a piece of your homework paper.
so --- close enough
but the larger the gap the higher the voltage rise -
going beyond .025 will gain you nothing - but try it - sooner or later the spark will fail to jump across the electrode to ground --it will jump somewhere else - bad news -- we tested .015 " to .025 and best we found - about .025 Maximum