Spark plug mod

[zpiloto]

I've had some really good number on my last tank(considering it was mostly city) and lately on my commute. The only thing different besides removing the WAI (which was for about 100 miles) is a spark plug mod found here.http://fueleconomytips.com/index.php...id=31&Itemid=2
I just used the standard NGK plugs regapped at .035 instead of .044 and indexed. These plugs replace the side gapped and index one that were in there. I've got about 350 miles on them. Don't really know how to test this but it sure is not hurting anything and only took about 35 minutes to.

[thisisntjared]

so wait, all you did was get off the shelf plugs and close the gap?

[zpiloto]

No you drill a 1/16" hole in the bonding strap above the electrode and then dish the electrode a little so that when it fires the spark will go through the hole in the bonding strap for more spark front. There's pictures in the link. It an interesting idea, granted that there is only 2-3% to be gained in this area but every bit helps.

[SVOboy]

I'm planning on doing extensive plug testing somewhere down the road, it'll be expensive, but whatev, it'll be nice to know also, I say, so yeah.

Anyone know who has the indexing washers now?

[krousdb]

Originally Posted by SVOboy

I'm planning on doing extensive plug testing somewhere down the road, it'll be expensive, but whatev, it'll be nice to know also, I say, so yeah.

Anyone know who has the indexing washers now?

I still have them. Just tell me where to send them.

[SVOboy]

I guess you dun got my address no mores. I'll pm you with your fancy instant messaging client.

[Ford Man]

Originally Posted by krousdb

I still have them. Just tell me where to send them.

Where can you buy the indexing washers? I need to get some too. Disregaurd this post I posted before reading everything.

[smay665949]

You can get indexing washers from Summit Racing Equipment. www.summitracing.com

[Ford Man]

Originally Posted by zpiloto

No you drill a 1/16" hole in the bonding strap above the electrode and then dish the electrode a little so that when it fires the spark will go through the hole in the bonding strap for more spark front. There's pictures in the link. It an interesting idea, granted that there is only 2-3% to be gained in this area but every bit helps.

The link no longer works. I have heard of people doing this before, but never knew exactly how it was done. Does the hole go directly above the electrode? What do you use to dish out the electrode?

[onegammyleg]

Why not use plugs with open electrodes.

I have used Magneti Marelli 4 electrode splugs extensively in performance applications.

Or you can use these..



But I have not seen an ounce of FE improvement.