GStwin.com GS500 Message Forum

just wondering what spark plug everyone likes. ive always used stock ngk, but thinking about go iridium ngk.

I like mine, they are really clean so I figure they are doing a good job.   :dunno_white:

do you have iridium?

Diamond Fire E3 plugs part number E3.36.

Sorry, Iridium, it's in my sig below.  :oops:

NGK DPR8EA-9  :cheers:

GOT IRIDIUM?  :cheers:

Whatever's cheap. :dunno_white:

Quote from: ben2go on June 02, 2008, 08:05:43 PM
Diamond Fire E3 plugs part number E3.36.

i work for advance auto parts, i sell a lot of those for leaf blowers and snow blowers, never heard of any complaints. just didnt really even think of them for my bike.

Cusimano
Do you know what company makes the E3 plugs?Are they a new company?Their packaging doesn't state that info.Website doesn't either.  :dunno_white: I've been out of the auto loop for a while.


According to some testing on one of those DIY TV shows, an improvement in fuel effiecency and power.They were tested on a dyno using a 250 hp GM 350.AC Delco plugs were what they were comparing them to.They got 12 hp and 18 ft-lbs of torque over the AC Delco plugs.And roughly picked up 5 mpg.I found them at Lowe's for $3.95.

as far as i know their fairling new company, ive found there website through my store. http://www.e3sparkplugs.com/about.htm

My stock plugs lasted more than 20k miles and still looked pretty good.  I think the only reason I changed them is because the replacement interval is 10k miles or something like that.  I replaced them with another set of regular NGKs.

I pretty much just run the stock NGK plugs.  In my bike they lasted a good 21k miles, and I put new ones in.

hey ben2go, did you notice any difference with the e3's?

Quote from: mikedrees on June 07, 2008, 09:10:13 AM
hey ben2go, did you notice any difference with the e3's?

My bike isn't finished, for me to do a road test,but it starts easier and quicker.

I used to side gap and index my plugs.It's an old drag race trick.You cut or file the arm back to just past the center electrode.Then gap it an angle exposing the center to the top of the piston for better flame propagation.Indexing involes marking the arm position on the ceramic  with a sharpE so that it's open to the intake valve when screwed in.You can buy indexing washers or have a few plugs and trying them till you get them where you want them.

It does make a differance.Atleast it did on my BB 390 Interceptor Ford.This winter I'm going to dive into a few of these tricks I used to use for the drags.And even a ram air system....All of the little details add up to real HP numbers at the rear wheel. :thumb: :cheers:

Quote from: Ronin on June 07, 2008, 11:50:59 AM
I used to side gap and index my plugs.It's an old drag race trick.You cut or file the arm back to just past the center electrode.Then gap it an angle exposing the center to the top of the piston for better flame propagation.Indexing involes marking the arm position on the ceramic  with a sharpE so that it's open to the intake valve when screwed in.You can buy indexing washers or have a few plugs and trying them till you get them where you want them.

It does make a differance.Atleast it did on my BB 390 Interceptor Ford.This winter I'm going to dive into a few of these tricks I used to use for the drags.And even a ram air system....All of the little details add up to real HP numbers at the rear wheel. :thumb: :cheers:

Yea.I used to fight with plugs and shims to index them.It's to much pain for no gain.The GS just hasn't got enough in it to utilize a good plug indexing.It wouldn't hurt nothing to do it, but it is a waste of time to me.