Thread: How To: Side Gap Spark Plugs

stock iginition with the exception of the ngk blue wires... im running 18lbs of boost ive yet to see any negative effects of running such a large gap. but seen the side gapping but wasnt sure if it would or wouldnt effect the plug gap at .45''

I would gap them down to .035" that way it should equal to .045". If anything you can always increase or reduce gap.

question.

wonder if you would see any differences with the splugs side gapped and indexed verses side gaped and non index? you would think that the side gapping would farther help the indexing of the plugs as you are cutting away more of the plug to expose the spark farther more to the fuel.

what do you think

Well I saw 2 whp difference on a turbo motor between random index and a pretty decent index. As in not every single plug was perfectly facing the Intake ports.

Now you do bring a good point. With NA you are better off indexing and side gapping. With turbo side gapping and actually having a reverse index might work better on keeping the spark from blowing out.

so you mean that in NA engine you should sige gap a close the gap? sorry for the confusion but i do not know the terminology.

Na you can get away with a bigger gap. I would run huge gaps but boost blows them out.

If I didnt see the charts I would still be thinking electric supercharger inside the intake about this...

snake oil all the way eh?

I honestly didn't expect 7whp, 1-2 yes. Which is what I got from indexing the plugs.

Gonna try this on a bone stock SR20DE, what gap should I use? And the numbers mentioned here are in inches? Need to know, cause I need to convert to metric system :P.

I feel like trying this in the morning since I have a long commute. I usually know what I spend in fuel and could see if this helps my car at all. Surprised I haven't seen this till now. Sweet.