Spark plug gap in English please By mthomas (Read 43,902 times)

[wildman]

A Dr. Rich
How's it going my friend??

A side gaped spark plug, turn a standard spark plug into more of a high performance spark plug w/ out the expense.. Side gaping is a method used for performance w/ in the racing industry & 2 stroke outboard industry before the Iridium & Denso plugs, & is still used by many still today.. Here is good information about side gaping & how to do it.. These links below illustrate & explain better than I can..

www.performanceunlimited.com/documents/plugsidegapping.html

performanceunlimited.com/illustrations/sparkplugs.html

Now if you want to go all out & fancy, check out how to index your side gaped spark plug... Click on the link below & scroll to the bottom of page..

youroilshop.com/plugs.htm

Now I've only side gaped spark plugs & have never indexed one, mostly because I haven't found anyone who supplies 10mm indexing washers.. Need to have an engine machine shop make up different thickness 10mm indexing washers..

David Sr.

[speedracer]

OK, my NGK Iridium plug did come with a .026 gap setting as it did with the previous Iridium plug it is replacing. As far as a stock scooter goes I'm not sure what constitutes stock. UNI air filter,40 pilot jet and now a 125 main jet, Mikuni fuel filter, all new hoses, vacuum and fuel. Totally new variator, sliders, and clutch including contra spring. Hmmm and of course the Iridium plug. I have fooled around with the NGK C7HSA plug and set it at .032 and have found no difference between the two plugs.

With the changes I have made I went from a scooter which ran like crap to a scooter which starts, never stalls, doesn't bog down at all, gets good fuel mileage, and keeps up with traffic.

[speedracer]

Forgot to mention I added a no rev limit CDI and a HP coil. You can all tell me if I am running stock... Thanks Speed Racer

[jrryan]

Nope Spedracer you pretty modded up!! LOL Dr. JR

[wildman]

speedracer
No, that's not stock.. If it's running good, I don't understand what the problem is...

[Bashan]

Thanks David Sr. , very informative. I never heard of that, never too old to pick something new up. Rich

[wildman]

Doc Rich
Ya, I'm run a side gaped plug in my "08 Longbo scoot, because the head I put on it, I had to tap it for a 14mm spark plug.. The only Iridium spark plug in a 14mm w/ the right reach & heat range is by Denso which is a foreign plug, & I've only found them outside the U.S. So I side gap a standard Champion plug to get as much performance out of it as possible..

David Sr.

[wildman]

Well, Well, Well!!!
Just for the heck of it, I thought I'd try a different angle on this 14mm Iridium spark plug.. I hadn't been able to find 14mm Iridium in an NGK plug.. So just for the heck of it I cross referenced the Denso Iridium IWF22 plug, which brought up a NGK Iridium BR7HIX.. Good Deal!!

David Sr.

[speedracer]

May 6, 2010 15:05:29 GMT -6 wildman said:

speedracer
No, that's not stock.. If it's running good, I don't understand what the problem is...

Wildman, I never stated I had any problem. I was only trying to answer the subject question. It just so happens that the two Iridium NGK plugs I purchased have a gap of .026. If NGK makes an Iridium plug with a larger gap I wish they would advertise it.