Spark plug modification.
- Thread starter Nate D
- Start date
I got off the phone today, after speaking with a tech-head from NGK Australia.
Unfortunately, NGK does not make 'any' sparkplugs other than standard coper core plugs for our Happy Time style engines.
I'll have to check with Denso to see if they have a supplementary gap (multi pronged) sparkplug to suit these 2-stroke engines.
Fabian
Unfortunately, NGK does not make 'any' sparkplugs other than standard coper core plugs for our Happy Time style engines.
I'll have to check with Denso to see if they have a supplementary gap (multi pronged) sparkplug to suit these 2-stroke engines.
Fabian
matesrates
New Member
Hi there
I have the triple electrode engine kit.....
But i havn't test this spark plug properly as.I just changed to ngk bp6hs from new as it was i longer tip.....
Its the newest motor available in "austrailia"
Started selling 27th april 2010
Its call a skyhawk..(go sick em) 70cc
Comes with speed carbi
Slant head
Meant to have bigger ports ect ect
oldtimer54
Member
Ya I have the same engine just braking it in. Very nice. What "off the shelf" plug would you use to max out the bottom end power? (if there is such a plug)
matesrates
New Member
Yeh thats the one but mine is black
Have you tested the spark plug that bcame with kit???
I had problem 1 stl when i bought it needle setting was 2 notch's at top...Like normal,but my engine had very low bottom end torque i had to half choke it to get it moving...so now its running on a rich setting 2 notch's from bottom....Maybe because of the twin boost bottles....(yes i know that don't do much only look good) Also i changed spark plug lead to 8mm car lead....But now its haveing a slight miss all thoughout rev range....But after all of this engine has power but just a slight miss fire
Can you suggest anything i could try???
My ngk gaped at .027 and i have a long street exhaust
I am running mine just like it came. Needle clip one ring down from the top. A little bit rich at midrange but won't hardly run with the clip in the top ring. I am going to retry the top ring with a thin washer under the clip. It is all apart now installing a SBP shifter kit. I put a Iridium spark plug in it and it runs the same as the one that came with it.
Jim
Jim
I may need corrective logic but my understanding of electricty is current flow wants to take the path of least resistance and electrical presssure will build up till there is enough pressure to force electrons to jump the gap.
From what i understand, the electrical charge won't divide itself once it's bridged the gap to the ground electrode (ground strap).
It doesn't matter how many ground straps are attached to the sparkplug, the electrical pressure will build up and jump the gap of least resistance, but, in a supplemenatry gap spark plug (multi-pronged) the electrical pressure has a second or third or fourth option to jump the air gap and create a spark (in the case of a 2 or 3 or 4 pronged plug) if there's insulating material deposited on a ground strap, be it soot, oil or heavy carbon deposits.
Fabian
From what i understand, the electrical charge won't divide itself once it's bridged the gap to the ground electrode (ground strap).
It doesn't matter how many ground straps are attached to the sparkplug, the electrical pressure will build up and jump the gap of least resistance, but, in a supplemenatry gap spark plug (multi-pronged) the electrical pressure has a second or third or fourth option to jump the air gap and create a spark (in the case of a 2 or 3 or 4 pronged plug) if there's insulating material deposited on a ground strap, be it soot, oil or heavy carbon deposits.
Fabian
matesrates
New Member
All fixed now running sweet nowYeh thats the one but mine is black
Have you tested the spark plug that bcame with kit???
I had problem 1 stl when i bought it needle setting was 2 notch's at top...Like normal,but my engine had very low bottom end torque i had to half choke it to get it moving...so now its running on a rich setting 2 notch's from bottom....Maybe because of the twin boost bottles....(yes i know that don't do much only look good) Also i changed spark plug lead to 8mm car lead....But now its haveing a slight miss all thoughout rev range....But after all of this engine has power but just a slight miss fire
Can you suggest anything i could try???
My ngk gaped at .027 and i have a long street exhaust
I regaped the spark plug 5mm wow what a differance bp6hs..............Is it safe to run such a big gap 5mm
?????Works even better than the standerd one with 3 electro
matesrates
New Member
....Sorry this is bicycle .....
But has any one done this mods to there cars???????????
I want my car to go faster also
But has any one done this mods to there cars???????????
I want my car to go faster also
In regards to triple ground plug.Here's the description given on web.
The 3 point plug was originally designed for slanted cylinder heads. The 3 point plug has three electrodes for extra spark and useful life. On occasion, the electrode can block the spark on slanted cylinder heads. This new design will give more consistent power especially with slant head designs.
Although I think electrode and ground strap may be reversed in the statement.Wether info is correct,not sure.
The 3 point plug was originally designed for slanted cylinder heads. The 3 point plug has three electrodes for extra spark and useful life. On occasion, the electrode can block the spark on slanted cylinder heads. This new design will give more consistent power especially with slant head designs.
Although I think electrode and ground strap may be reversed in the statement.Wether info is correct,not sure.
Attachments
oldtimer54
Member
Do you know where to find one of these?
Nate D
New Member
You can use a 3 electrode or a 4 even which is what I am now using. I made a post on how you can use any spark plug you want using a simple spacer.
http://motorbicycling.com/f13/use-any-spark-plug-you-want-22343.html
http://motorbicycling.com/f13/use-any-spark-plug-you-want-22343.html
Sabotronics Inc.
New Member
Hello!
I don't know too much about it, but it sounds very interesting. Therefore I'll try to file back the "ground" of my sparkplug, just to see what happens, jeje!
I don't know too much about it, but it sounds very interesting. Therefore I'll try to file back the "ground" of my sparkplug, just to see what happens, jeje!
wayne z
Active Member
Back in my Ducati days we used to grind off enough of the ground strap so that it only covered 2/3rd of the electrode. This was proven to increase performance with dyno tests. Exposes spark kernel to combustion chamber better.
Another well known hotrod mod is to index the plugs in the head to keep the ground strap away from the intake side of the combustion chamber or away from center of mass of combustion chamber,depending on engine type .
To index a plug, you mark the location of the ground strap on the plug body with a sharpie ect, and install the plug to see where is is located.
then you can add more plug gaskets to change the strap's positon when the plug is re-installed.
The idea is to keep the strap from "shadowing" the spark from the mass of the chamber as much as possible.
Wayne Z
Another well known hotrod mod is to index the plugs in the head to keep the ground strap away from the intake side of the combustion chamber or away from center of mass of combustion chamber,depending on engine type .
To index a plug, you mark the location of the ground strap on the plug body with a sharpie ect, and install the plug to see where is is located.
then you can add more plug gaskets to change the strap's positon when the plug is re-installed.
The idea is to keep the strap from "shadowing" the spark from the mass of the chamber as much as possible.
Wayne Z