Re: Side-Gapping and Indexing Spark Plugs
 

What kind of MPG gain should I expect from that % wise? I didn't see any numbers here (not saying they aren't here just saying I didnt see them).

Also where do I find the washers for indexing.

Thanks in advance for your help.

Jack

Can't quantify any gain for me. Just thought it was worth a try.

Hey Jack, I obtained indexing washers at a local speed shop. Accel puts out a 30 ct. 'variety pack' w/ 10 of each size washers. Don't expect a noticible increase. Not to say that it doesn't help, but I think mpg gains are on a case to case basis. I have some extras if you want to PM your name/address I can send you some (may have to double up on some plug/slim pickings-mainly thin ones left). But at least you wouldn't have to drop the $ before checking out any possible results. Good Luck.

Got it Jack, will send them out tommorow.

This will be one of the things I test once I get my testing route super nailed to hell. "The Ultimate Test of Plugs and Plug Combinations"

let us know the results, which way the spark plug is turned too.

It will be in a long time, I need to iron out a lot of things first, so don't hold your breath.

ok.I just want to know incase I run out of stuff to do. I still have plenty of stuff left.

Where does this thread begin?

https://www.gassavers.org/showthread....ht=spark+plugs

I do believe.

Thanks XFi. I got your washers today. I didnt expect them to be copper (but duh what else would they be) I dont know why. I think I may have some of these in my basement from when I moved in the house. I will have to go take a look. I will work on getting they on this weekend. Thanks again, Jack

No problem...if you have extras after indexing, share the wealth and pass them on.

I was planning on it. Again thanks.

side gapping
 

maybe someone on honda tec has something differnt to say, but at least for honda engines, I've been told that side gaped plugs are not affective, that you just need to index them, but that some other engine designs do benifit from side gaped plugs, when I was at our local little airport the other day checking out a friends little airplane that was getting it's annual inspection I noticed that they use a really weird looking spark plug that has the duel side gaps kind of like bosch +2 plugs, of course they are not so much concearned about clean burning, or effcent, but more so long lasting and anti-fouling, and from what I've read in SAE books, side gaped plugs are not as effecient, but they are difficult to foul.