Plugs a million.

I've heard a few opinions but still like to know all thats been proven. Which spark plug do you swear by for the best flathead performance? I'm liking the BU8H. Its super easy to index for sure 😉
 
I've heard a few opinions but still like to know all thats been proven. Which spark plug do you swear by for the best flathead performance? I'm liking the BU8H. Its super easy to index for sure 😉
The one that fires every time that it is told to by the coil.
My personal preference is the ND W24FS-U.
For years the "go-to" plug was the Autolite 411.
NGK offers a great iridium plug in the same heat range and thread reach.
And for those that can't (or don't care to) index a spark plug, there's the BU8H.


-----
🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
Carlson Motorsports on Facebook
31 years of service to the karting industry
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
 
" The one that fires every time that it is told to by the coil " .
That's a for sure .
If not that one the 411 .
 
The one that fires every time that it is told to by the coil.
My personal preference is the ND W24FS-U.
For years the "go-to" plug was the Autolite 411.
NGK offers a great iridium plug in the same heat range and thread reach.
And for those that can't (or don't care to) index a spark plug, there's the BU8H.


-----
🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com Carlson Motorsports on Facebook
31 years of service to the karting industry
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
I have the 16 the 20 and a 31 u groove denso /nd.
 
good to know. I thought it was other way around. Have you ever used a Brisk plug. From what I have seen they claim to be the best thing since sliced bread.
 
Me either. I was researching different plugs and they showed up. I thought it would be a joke but they seem to pack a punch.
No one ever looks at the plug. I had a 3910X foul out on the grid. A fellow racer (his kid was in the race) helped me change the plug.
Gave him a Brisk to put in and he didn't even notice, altho' he should have. ;)
 
No one ever looks at the plug. I had a 3910X foul out on the grid. A fellow racer (his kid was in the race) helped me change the plug.
Gave him a Brisk to put in and he didn't even notice, altho' he should have. ;)
Those ones that spark in 3 big circles should have huge gains. If a person can't feel a spark plug difference good or bad, I'd have to say they have an rear of stone. Lol
 
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