Discussion
ChimpOnGas said:
Great stuff Peter, lets have a review of the Denso TTs when you've fitted them.
At this point its worth reminding ourselves of the dreadfully inappropriate shrouded electrode no 7 (too cold rated) NGK B7ECS, and how they normally look when you pull them out.
Compare this with the much more suitable extended electrode BPR6ES, but sitting next to the even better new for 2015 Denso TT with its twin fine wire electrode plugs.
Kind of makes the original B7ECS chosen by TVR look archaic, which of course it is!
On the Denso TT only the centre electrode is iridium with the earth electrode being platinum, this is the same recipe as my very expensive NGK LPG Laserline plugs which add a special anti-corrosion coating for longer life when burning propane.
The main difference is the platinum earth side on the Denso TTs is a second fine wire construction like the iridium centre electrode, so it too sits projected out of the electrode. The platinum on my NGK LPG Laserline plugs is a chip that is set into the earth electrode so it retains the traditional earth electrode shape.
I really like the look of the Denso TT design, I saw benefits when I moved to iridium plugs and the Denso TTs could be the next step in the development of the fine wire concept which definitely works, car manufacturers adopted the technology some time ago and they don't fit snake oil.
While I appreciate a lot of the benefit is longevity and service life we all know from school by physics that electricity prefers to conducts through sharp pointy shapes rather than flat ones. Lightning is often used to demonstrate this in a very dramatic way, the reason is that for an electrically charged object the electric field at the surface is inversely proportional to it's curvature radius. When an object is very sharp, the electric field is higher and can induce a lightning channel by attracting air then repelling the electrons in the air.
This is why lightning rods are pointed, lightning rods typically have a sharp & pointed tip because electric lines of force are more highly concentrated around pointed objects for the reasons already given. And lets be honest if lightning strikes you want it to strike the lightning rod and not the structure the rod is there to protect, for many years the tallest buildings in our towns & cities were churches, this is why church spires are typically pointy.
In the case of a spark plug you want the spark to jump in a controlled way using the least voltage possible so it stands to reason anything you can do to help with this like making your electrodes sharper and more pointy will only be a good thing. If using one sharp and pointy small radius fine wire electrode as with my iridium tipped LPG Laser Lines offers clear benefits, then using the same well accepted rules suggest having two opposing pointy electrodes (live & earth) as with the new Denso TT will deliver twice the benefit.
Let us know how you get on with them mate
Is everything said above right for all chimaera versions? Should i also put some bpr6es on my chim 500?At this point its worth reminding ourselves of the dreadfully inappropriate shrouded electrode no 7 (too cold rated) NGK B7ECS, and how they normally look when you pull them out.
Compare this with the much more suitable extended electrode BPR6ES, but sitting next to the even better new for 2015 Denso TT with its twin fine wire electrode plugs.
Kind of makes the original B7ECS chosen by TVR look archaic, which of course it is!
On the Denso TT only the centre electrode is iridium with the earth electrode being platinum, this is the same recipe as my very expensive NGK LPG Laserline plugs which add a special anti-corrosion coating for longer life when burning propane.
The main difference is the platinum earth side on the Denso TTs is a second fine wire construction like the iridium centre electrode, so it too sits projected out of the electrode. The platinum on my NGK LPG Laserline plugs is a chip that is set into the earth electrode so it retains the traditional earth electrode shape.
I really like the look of the Denso TT design, I saw benefits when I moved to iridium plugs and the Denso TTs could be the next step in the development of the fine wire concept which definitely works, car manufacturers adopted the technology some time ago and they don't fit snake oil.
While I appreciate a lot of the benefit is longevity and service life we all know from school by physics that electricity prefers to conducts through sharp pointy shapes rather than flat ones. Lightning is often used to demonstrate this in a very dramatic way, the reason is that for an electrically charged object the electric field at the surface is inversely proportional to it's curvature radius. When an object is very sharp, the electric field is higher and can induce a lightning channel by attracting air then repelling the electrons in the air.
This is why lightning rods are pointed, lightning rods typically have a sharp & pointed tip because electric lines of force are more highly concentrated around pointed objects for the reasons already given. And lets be honest if lightning strikes you want it to strike the lightning rod and not the structure the rod is there to protect, for many years the tallest buildings in our towns & cities were churches, this is why church spires are typically pointy.
In the case of a spark plug you want the spark to jump in a controlled way using the least voltage possible so it stands to reason anything you can do to help with this like making your electrodes sharper and more pointy will only be a good thing. If using one sharp and pointy small radius fine wire electrode as with my iridium tipped LPG Laser Lines offers clear benefits, then using the same well accepted rules suggest having two opposing pointy electrodes (live & earth) as with the new Denso TT will deliver twice the benefit.
Let us know how you get on with them mate
NZ fan]I have been running bpr6es plugs in my chim 500 for the last 50000kms with no issues. you only need resister plugs [which these are said:
if you drop the extenders which is highly recommended.
ChimpOnGas said:
For anyone considering a plug swap I'll repeat what I said and was ridiculed for all those years ago.... "Try a set of BPR6EIX iridium plugs in your naturally aspirated Rover V8, and tell me I'm wrong" 
Doing this based entirely on your quote and the sheer amount of fang dooglery technical stuff you talk about. Prizam said:
ChimpOnGas said:
For anyone considering a plug swap I'll repeat what I said and was ridiculed for all those years ago.... "Try a set of BPR6EIX iridium plugs in your naturally aspirated Rover V8, and tell me I'm wrong"
Doing this based entirely on your quote and the sheer amount of fang dooglery technical stuff you talk about. Prizam said:
Wonderfull! It's always a bit of a minefield with these things.
Hopefully, a completely new ignition system will fix the high RPM misfire. otherwise, Rockingham will be interesting.
If you feel it needs a remap, Jools is your man. He is up the M1 at Chesterfield, and has his own rolling road. He can remap the 14CUX. His website is Kits and Classics.Hopefully, a completely new ignition system will fix the high RPM misfire. otherwise, Rockingham will be interesting.
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