Sparkplugs

[memini55]

Hello all
Am looking for recommendations on the best brand and type of sparkplugs. Just completed our major overhaul and would like to get the best plugs installed before our trip to LOG. This is a +2 with 10.5 pistons, L114 cams and webers. We are using and ignitor ignition.
In the past we have run Champion RN7YC but have had a few fail and looking for better options.
Any thoughts would be welcome.
Mark

[steveww]

I use NGK BPR6ES for the slightly tuned twinc in my S4. I find the slightly hotter plug better for road use.

[ElliottN]

There are numerous threads on this and there is a reasonable body of opinion that NGK plugs are the go with the choice being BP6ES, BP7ES or BP8ES which are for general purpose (6), consistent high speed running (7, cooler) or race (8, coolest). Do a search on (Say) NGK or have a look at http://www.lotuselan.net/forums/viewtopic.php?t=12506 - expands on this and explains some of the other NGK plugs.

I'm a general road user and am thoroughly happy with NGK BP6ES's.
rgds,

[steveww]

The NGK heat numbers go the opposite way to Champion so a 6 is hotter than a 7 see http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm

[memini55]

Thanks to all
It looks like the NGK's are of choice and I picked up a couple sets today.

Mark

[lotuselan2]

The recommendations on heat range and NGK are spot on with me. The ES plugs are all conventional electrodes. Does anyone have experience with their fine wire plugs? I think they are now Iridium or have an "X" in their number. Usually these plugs widen the temperature range and resist fouling more even when colder plugs are used.
Ken

[elancoupe]

I run the iridium NGK plugs in my fuel injected all terrain vehicle, and have found them to be a nice upgrade. I will be trying them on the Elan soon.

[zeteclotus]

I also use NGK BPR6ES for a 130/5 I also find the slightly hotter plug better for road use.

Almost sold the car I got through so many champion spark plugs, they also stopped my motor bike starting my strimmer my chain saw....

[handi_andi]

I used to run the Bosch four pronged spark plugs in my Spitfire with some success but haven't seem them around recently. Has anyone seen them and has anyone tried them out in a Twincam?

Andy

[memini55]

An update as we put in the NGK BPR6ES plugs and what a difference. Have logged about 400 miles since and what a nice difference. No early failure like we had with the Champions. Again thanks to all that replied.
Mark

[264889socal]

Since getting my Elan on the road about 9 months ago, I have using NGK BPR5EIX and BPR6EIX Iridium fine wire plugs. The car gets all sorts of different driving conditions. From short hops to long haul 80 mph freeway driving. So far, I love'em. Haven't decided on which to use all the time, but I am leaning to the 6's. From what I have seen, there should be no need to change plugs based upon driving conditions. Been using these plugs in my Nissan A series racing engine since they have been available. Never a problem. They just seem to love abuse and last for ever. You can flood the snot out of the engine when hot and they still fire. The Nissan has an Electromotive twin coil crank fire ignition, which makes a very hot spark, but my Elan is still running a generator and points but starts with just a touch of the starter every time.

Rob Walker

[264889socal]

Since getting my Elan on the road about 9 months ago, I have using NGK BPR5EIX and BPR6EIX Iridium fine wire plugs. The car gets all sorts of different driving conditions. From short hops to long haul 80 mph freeway driving. So far, I love'em. Haven't decided on which to use all the time, but I am leaning to the 6's. From what I have seen, there should be no need to change plugs based upon driving conditions. Been using these plugs in my Nissan A series racing engine since they have been available. Never a problem. They just seem to love abuse and last for ever. You can flood the snot out of the engine when hot and they still fire. The Nissan has an Electromotive twin coil crank fire ignition, which makes a very hot spark, but my Elan is still running a generator and points but starts with just a touch of the starter every time.

Rob Walker