indexing spark plugs
Thread Starter
|
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,562
Likes: 3,956
From: Vermont
indexing spark plugs
Does anybody index their spark plugs when installing them? I know you probably can't notice much of a difference, but I was just wondering who does this and if anybody actually did see a difference?
Stellar HDF Member
Joined: Apr 2005
Posts: 3,108
Likes: 9
From: Lincolnton, NC
RE: indexing spark plugs
But then again, after I wax my bike it appears to go a bit faster
The benefits of plug indexing may be so small that you probably would not be able to tell any difference. Won't hurt anything but you may rather spend that time riding.
Road Warrior
Joined: Feb 2006
Posts: 1,281
Likes: 8
From:
RE: indexing spark plugs
ORIGINAL: dawg
Does anybody index their spark plugs when installing them? I know you probably can't notice much of a difference, but I was just wondering who does this and if anybody actually did see a difference?
Does anybody index their spark plugs when installing them? I know you probably can't notice much of a difference, but I was just wondering who does this and if anybody actually did see a difference?
It's not worth the time it takes to do it on a street bike.
Cruiser
Joined: Aug 2006
Posts: 172
Likes: 0
From:
RE: indexing spark plugs
Honestly, its sort of a wives tale.
Drag racers run very close tolerances and domed pistons, especially Chevy motors with large chamber heads.
With that, the electrode can actually hit a piston, requiring the need to index the plugs for clearance. This evolved into logic that it gained power
I have never seen a power increase and consider it a waste of time, especially in a motor with good quench and lots of turbulence, the flame front moves very evenly and will burn complete wherever the ground strap of the plug is
I suppose in theory, if the chamber was inefficent and very "un-turbulent" you may want to point the open area to where the fuel stalls, but it'd be a guess to WHERE to point it LOL
Drag racers run very close tolerances and domed pistons, especially Chevy motors with large chamber heads.
With that, the electrode can actually hit a piston, requiring the need to index the plugs for clearance. This evolved into logic that it gained power
I have never seen a power increase and consider it a waste of time, especially in a motor with good quench and lots of turbulence, the flame front moves very evenly and will burn complete wherever the ground strap of the plug is
I suppose in theory, if the chamber was inefficent and very "un-turbulent" you may want to point the open area to where the fuel stalls, but it'd be a guess to WHERE to point it LOL
Trending Topics
Elite HDF Member
Joined: Feb 2006
Posts: 3,515
Likes: 6
From:
RE: indexing spark plugs
You will notice better performance by running the corect tire pressure than indexing the plugs.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
