Thread: How To: Side Gap Spark Plugs

Guys, this works VERY well, it yielded me 7WHP over non-gaped and not indexed brand new plugs! Check first post for dyno numbers.

you've convinced me... after all, i can always call kevo to get me a set of the 7's he's got... or buy a new set of 6's or just turn the timing down a notch.... i'll try to go for this tomorrow afternoon and see what the dyno butt yields on the n/a side...

Haha now you listen!

When I was NA Butt dyno picked up nothing, but MPG went up quiet a bit. Like that's the first time I got 38mpg on the highway.

I need to try this. I've got them indexed, but not gapped.

oh i do listen to you mate... just hadn't taken the time to do it... i'm glad i did thought got an almost perfect index and butt dyno picked a slight improvement on low end...... haven´t driven it hard but i hope i get a chance... i'll let you know

Sweet, let us know how it turns out, esp with gas mileage



Haha yeah, I got perfect index on first 3 cylinders, then the last one had to ruin it, so had to switch out 4 and 2 hehe.

^You running NGK's? Did you only use one washer per plug? In Vadim's :HOW TO: / :NOTE: #4 says you may have to use another plug if the one washer don't get you close enough to the right index.

Well, since I'm halfway in between plugs (as in I won't change for about another 20K miles) I put the plug that matched the best in each slot. Three of them are off by about 20-30* and the other cylinder is actually way off. I didn't have any washers, nor really plan on buying any.

I would use the crush washers that come with the plugs and tried to get the best index possible, but without replacing the washers.

If you just can't get a good index, try another spark plugs hehe.

I remember my NGKs came with washers already one them. I didn't try taking them off, but if they are removable, should I try removing them to get the best index? I don't want to have the plugs hit anything down there.