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90blkbrd
12-20-2009, 11:00 AM
I was watching Horsepower TV yesterday and they were talking about indexing a spark plug. It occurred to me that this was done on the plugs that I just removed from my car.

Who actually does this on their SC?

http://i156.photobucket.com/albums/t18/mjmenke/1990%20white%20SC%20Manual/001.jpg

some prior discussion on this subject.

http://www.sccoa.com/forums/showthread.php?t=33472
http://www.sccoa.com/forums/showthread.php?t=33567

Super XR7
12-20-2009, 11:34 AM
Mike, are you sure those are SC plugs? I don't see any blood on them.

Mike

90blkbrd
12-20-2009, 11:47 AM
Mike, are you sure those are SC plugs? I don't see any blood on them.

Mike

I swabbed all of them down and did a DNA test on them. The test was 100% positive hit on Dalke's DNA.

XR7 Dave
12-20-2009, 01:05 PM
Not bad for -what- 25K miles?

Just looked at your garage - 400hp in whose wet dream???:eek:

DLF
12-20-2009, 01:29 PM
I did it when I did my big rebuild in 2003, haven't done it since.

90blkbrd
12-20-2009, 01:38 PM
Not bad for -what- 25K miles?

Just looked at your garage - 400hp in whose wet dream???:eek:

Odometer shows 22192 miles, which is supposedly very close to when you installed the motor. So you were very close. I'm very impressed with the plugs.

If you purchased the 2008 shootout DVD it has me winning the most HP with a M90 at 400 rwhp. :eek::cool::eek: I did catch this prior to the release of the DVD but it was to late.


And you forgot to vote...but I pretty sure I know the answer.

BLOWN38
12-20-2009, 09:10 PM
Nah I don't index the plugs. May have once but not really sure.

How do you know those were indexed, Mike? I don't see any marks on em.

90blkbrd
12-20-2009, 10:00 PM
How do you know those were indexed, Mike? I don't see any marks on em.

Top 2 on the right have copper rings added to them. Notice they are different sizes.

here are some you can buy on Amazon.com.

http://www.amazon.com/Moroso-71900-Spark-Indexing-Washers/dp/B000COO0P0

Regul8r
12-20-2009, 10:42 PM
I used to do that in my mustang.
If you look at the plugs... the electrode is not in the same place on all plugs in relation to the start of the threads.

Put a paint/crayon mark on the wrench portion of the plug where the OPENING of the elctrode is.
Then run it in finger tight and see where it lands.
I used to make sure it was facing into the combustion chamber, not facing the close side of the wall.

Might have to try a couple/few plugs to get one that indexes in that cylinder, then repeat for all the others, might have to buy a few sets of plugs to get them all indexed...OR buy the index spacers.