performance spark plug?

brisbane_boy

brisbane_boy

New Member
Hey guys im posting this because i bought the otherday a NGK B6HS thinking it was a better plug for performance but i see on the zbox website they say the NGK R7-HS spark plug is better for performance.
Has anyone used 1 of these plugs? are they better?
Another question who has upgraded the lead going from the CDI to the sparkplug with just a lead from a automotive store?
If so what did u get and can u fell a difference?
THanks
DUncan
 
I don't know about that one but SBP sells a ngk bp6hs which is supposed to increase performance.

Sick Bike Parts NGK BP6HS Spark Plug

I replaced my wire and spark plug boot and it made a difference. But then again I replaced the spark plug, wire and boot all at one time so it could of been the sparkplug.
 
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I too replaced everything at once, so who knows exactly which one made the difference. I do know that the automotive wire has already started giving me fits, so I just used a piece of coax cable (cable tv) and soldered the connector end to it and slipped the boot on. Works great. probably will interfere with electronic speedos and the like though. Hopefully it doesn't give my gps fits.
 
BR7HS?

It will work.

Nothing really special. It's a resistor plug with a heat rage of 7, which is pretty cool for these engines. I would stick with a 6.
 
The spark plug wire can be had at MOST auto parts suppliers. Just ask them for a coil/ distributor wire. The Auto zone here took me to the back and let me pick a length and color as they had them hanging on the wall........

The B6HS is a good selection for the plug...........
 
thanks guys. yer i could fell a small difference with the B6HS so ill go down to the shops sometime and get a coil/distributor wire.
Thanks for ur help.
 
Im no expert on these little engines, but I do know that if your mixture is a little lean and then you get a hotter plug. It could burn a hole right through the piston. So you would have to monitor the plug checking it for the right color light brown.
 
i went out looking for a NGK plug I ended up getting the BP-R-6HS plug NGK site boasts it as a performance plug and I have to admit it Made a BIG difference when I changed from a autolite 425

link to the NGK info
NGK V-Power® Spark Plugs
 
On my first build, (August last year), I went out looking for a replacement plug.

Having messed around with boats quite a bit, I knew the older Evinrude outboards ran on a 24:1 fuel/oil ratio.

I went to West marine and looked up a 1965 10HP twin...the recommended plug NGK B6HS.

I have been using them since, and they work great!

About a month later I joined this forum and saw all of the recommendations about replacing the plug wire. I'm sure it's a good idea although I haven't had a problem yet with the Wang-Chung plug wire...which means nothing because I haven't been able to put any real miles on a MB. Lots of run time, (hours), up and down our dead end street; stop/start, trying to wear out clutches, but no sustained RPM trips.

Automotive plug wires are not the same...I'm guessing that carbon core resistor wire would not be a good idea? These ignition systems are low voltage.

I'm thinking the ideal replacement plug wire should be made from automotive racing wire that is intented for use with a magneto. This is purchased by the foot and the tight fitting boots, (that snap over the threads), are available as well. This is plug "wire" not plug pencil lead. This is what I will use when the time comes.

Jim
 
Would it be the same thing if you put an NGK BR7HS instead of a NGK BR6HS? because looking around I accidentally happened to buy the 7 instead of the 6. it just runs hotter right??? Oh yeah and would running that plug on my 25cc mess it up?
 
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NGK B6HS is the way to go for great starting point, you cant go wrong with this plug, you can change plug heat range depending on the the circumstances for fine tuning, I make up all my own leads using nothing but MSD parts, its what I use in all my race engines & simply custom make them up to suite the MB set ups, overall it makes a very noticable diffrence, not able to show Dyno sheet to prove the diffrence though, this will come shortly

I am working on something very intresting in regards increasing the spark side of things, if it works like I beleive it should its going to be a ripper of a set up! you will love it

cheers

Brains
 
What gap are you setting the B6HS plug at? I have been running stock plugs from the kit but I think it is time for a upgrade!
 
Excelant points all round, I to replace plug/lead and cap and the differance is very noticable.

For the plug cap I use NGK LD05F. The writings on the cap say: 66F and 5K Ohms
Anyone know if this is the correct plug cap ?

Plug lead is straight out copper plug lead I bought a roll from auto electrician, it is a very much thicker copper strands than the standard kit's supplied which feels soft like kats whiskers. I don't think it is actually proper spark plug lead.

As for the spark plug which is my real question, I always thought for some reason it's
NGK BP6HS, but you guys have stated NGK B6HS,
should I change plug immediately or is this ok ?

Thanks.
 
Question about heat ranges:
Are lower numbers hotter, and higher numbers colder, and is this consistent from maker to maker? F'instance, is a Champion L78 hotter than a L82?
 
A platinum plug is more resistent to fouling out than the cheaper steel plugs. Platinum doesnt oxidize so easily when the electrical arc goes across. Maybe carbon builup is a better description........platinum just plain doesnt corrode as easily as steel.
 
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