Spark plugs-powerfull spark

[tarzanscot]

Has anyone used ngk's iridium dr8eix plugs? how is performance, they say that on dyno runs it gives you aprox 5 more horse power and iridium takes less energy to create a spark,
and that they dont foul out? also has anyone heard of briskracing and there spark plug's? they make some pretty unique plugs i contacted them to cross reference the stock ngk d8ea to there special lgs spark plug and the number is BOR12LGS. this plug has unique 4 retracted gound electrodes so the spark is directly pointing into the combustion chamber
and there is no indexing. they also have a wild plug called permium zc/zs that has 3 different spark points on the plug per ignition impulse. check them out and please send some feedback im sure lots of gs owners would want info on a better type of igntion plug. http://www.briskusa.com/products.htm#premium

[posplayr]

ngk's iridium dr8eix plugs

I just stuck some into my GS1100ED, because I was fouling some plugs (long story). Anyway i forgot I had done the change and was going on a ride yesterday. The bike seemed to pull to redline faster than what I rememeber.
I'm attributing it to the plugs because nothing else was changed. Obvioulsy the bike runs smoother without any fouled plugs

I think I'll keep keep running them.

Posplayr

P.S. there have been plenty of threads here debating the plugs and their usefulness if you want to do a search. In my mind this is just one of the areas, that is kinda belt and suspenders and any performance gain is just added bonus, which in this case seems true.

[Old Colt]

I run Iridium plugs but I greatly prefer them from Denso. I doubt you will see 5 hp from a plug change on a motorcycle but you will find that it will start easier and run better overall. I still find NGK plugs do not last long, they tend to glaze the porcelain, I have had this most recently last spring with NGK Iridiums. They just do not seem to recover from loading up.
Way back in the early 80s I ran Champion Gold Palladium, They were the first good fine wire plug that I knew of. Now I install Iridium plugs in all the engines I work on. To me the Denso plugs are a buy once item for most all applications. Well worth the money compared to any other route for trying to get a better spark in an engine.

[trippivot]

no hp gains from a spark bolt period. sales ploy only

look...they just start the combustion event and control the heat delivered into the combustion chamber.

any improvements will be from a proper stoichiometric ratio and proper timing advance. == which equals complete even burn over the piston dome



ngk "ES" plugs are hi quality
ngk "EG" are better - fine wire that help for bad jetting (a little)

the iridium are expensive and give good peace of mind that you spent the most money .. even if your problem still exists

spend the time and get the carbs tuned RIGHT!!--- DUHH

any quams on glazing or not lasting long is crap and bad mechaniking.
yeah I said it and I know it is true


now champion plugs are low quality and cause hi rev misfires
ac delco I just do not like the design
split fire --- please, ha! junk
denso -not going to even try
NGK are the best on earth

[tkent02]

buy sell fix trade tune race consult stunt argue?

Although I agree with you, somehow I think argue will come soon.

[don_gibb6512]

ngk "ES" plugs are hi quality
ngk "EG" are better - fine wire that help for bad jetting (a little)

What's the difference between "EA" and both "ES" and "EG" ? I have been running D7EA for quite some time and finally have the carbs adjusted to where the plugs aren't fouling out but I believe the engine could run smoother. It honestly "feels" like it's just a bit too lean but the plugs say otherwise.

[trippivot]

the EA and ES are nearly the same standard plug, just in a different thread diameter


your spark plugs are the "window" into the engine. trust the color from a NEW set.


if you get them to a color that is like milk chocolate or close to it you are there.


smoothness might be effected by the sealing integrity of the valve and valve seats.
a leak down test will verify this. above 10% and you'll have a rough idle no matter what the plugs look like.

[82Shafty]

How do you feel about indexing plugs?

[trippivot]

How do you feel about indexing plugs?

if there is a clearance issue of course --hi comp engines

on a standard street engine I choose to draw the line on what my time is worth compared to what you get as a return..

it won't hurt to do it but that is a bit tweeker-ish

the angle or shielding is not a factor for good or bad running condition
it is to get that last .00001th of power to avoid detonation and pre-ignition

lets just say-- if there is a bunch on carbon build up in there like on the piston dome or combustion chamber area ... what is igniting the fuel mixture first is not the spark plug , but the glowing edge of the carbon flakes in there. that is a factor here if the plugs are black sooty and have been for a long time.

[bwringer]

no hp gains from a spark bolt period. sales ploy only

look...they just start the combustion event and control the heat delivered into the combustion chamber.

any improvements will be from a proper stoichiometric ratio and proper timing advance. == which equals complete even burn over the piston dome



ngk "ES" plugs are hi quality
ngk "EG" are better - fine wire that help for bad jetting (a little)

the iridium are expensive and give good peace of mind that you spent the most money .. even if your problem still exists

spend the time and get the carbs tuned RIGHT!!--- DUHH

any quams on glazing or not lasting long is crap and bad mechaniking.
yeah I said it and I know it is true


now champion plugs are low quality and cause hi rev misfires
ac delco I just do not like the design
split fire --- please, ha! junk
denso -not going to even try
NGK are the best on earth

Agreed on all points. Don't waste your money and time buying fancy plugs. If they're fouling, fix the source of the problem -- the jetting.

[lecroy]

now champion plugs are low quality and cause hi rev misfires
ac delco I just do not like the design
split fire --- please, ha! junk
denso -not going to even try
NGK are the best on earth

LOL, what ever happened to Dink anyway????

I used to use Champion plugs all the time. Still have them in the lawn mower and its been going on 18 years now with the same plug?

I use NGK in the bikes. The ones in the stock GS have been in there since I last moved. The race bikes also use NGKs. Have never tried denso but know one person who used them with good results. With the MC4 I could put in a dead fouled Walmart plug and I'm sure it would somehow fire it. LOL.

I don't understand the whole weak spark, needing to make this relay mod that everyone does. My GS will fire in the dead of winter with no problems. Next to the Harley it is the easiest to start. Stock ignition with the green coils. I did route new wires to the coils when I installed them. That was maybe 20 years ago.

[cyberdork]

Don't mean to hijack, but my plugs are coated in oil when I pull them. Should I switch to the D7's?

[trippivot]

oil dosen't burn so well .I'd pull the piston rings and valve seals

the coil mod is to get 12 volts to the coils

when you have old point system there is a resistor that makes it 9 volts at the coils. well these fellows that put a electronic ignition replacement need that extra 3 volts to get a blue hot spark

or there is too much resistance in the old wiring harness. mental reassurance ?? maybe

[tarzanscot]

Well i put the iridium plugs in last night and indexed them, drove it this morning and i noticed better throttle response but thats all i can tell. I
dont regret bnuying them its a learning experience ill see how they perfrom over the long run.