View Full Version : Indexing Spark Plugs

01-07-2007, 06:18 PM
I know this is a little off topic in the Pro Data & Software forum, but I was wondering what MSD and the forum thinks about spark plug indexing? Is it worth the time, has anyone seen any type of HP gains, ect?


Eric David Bru
01-07-2007, 09:00 PM
I recommend indexing for better clearance and flame spread.

01-10-2007, 04:04 PM
In all reality, short of you dealing with any clearance issues involved with the plug being hit and possibly have the gap close up on you, indexing the plugs is probably a non-issue.

Most people that spend the time and effort to index their plugs are racers looking for minimal horse power gains out of the engine.

Eric David Bru
01-10-2007, 04:06 PM
Agreed, I wouldn't waste my time on a street engine or any low compression setup.

But on a high compression engine, I always index the plugs.


01-13-2007, 07:23 PM
Thanks for the info.

I run a heads up class so every little bit helps.

Thanks again.

01-15-2007, 10:51 AM
Not a problem, anytime we can help.