Spark plugs

Spark plugs

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Discussion

WokingWedger

Original Poster:

1,030 posts

204 months

Saturday 3rd December 2016
quotequote all
As my plugs tend to be a bit on the sooty side (not getting to do a lot of spirited driving)I was thinking of swapping the NGK B7ECS for B6ECS.

Can't seem to find any though!

Can you still get them or have they been superceeded ?

Dr Mike Oxgreen

4,101 posts

164 months

Saturday 3rd December 2016
quotequote all
Go for BPR6EIX iridium plugs, and then don't change them again for at least 30,000 miles. I've got them on mine and they work well. I've attached a label to one of the HT leads saying "Iridium plugs - please do not replace" so that they don't get changed unnecessarily during a service.

Dr Mike Oxgreen

4,101 posts

164 months

Saturday 3rd December 2016
quotequote all
Oh, and I've removed the plug extenders (hence the resistive plug to compensate). Getting rid of the extenders and using a set of heat socks on the HT leads is highly recommended.

QBee

20,904 posts

143 months

Saturday 3rd December 2016
quotequote all
Spot on Dr Mike. Apparently the only exception to this brilliant advice is if you are running Forced Induction.

WokingWedger

Original Poster:

1,030 posts

204 months

Saturday 3rd December 2016
quotequote all
Dr Mike Oxgreen said:
Go for BPR6EIX iridium plugs, and then don't change them again for at least 30,000 miles. I've got them on mine and they work well. I've attached a label to one of the HT leads saying "Iridium plugs - please do not replace" so that they don't get changed unnecessarily during a service.
Any sugestion as to where to buy at a reasonable price?

igiveup

2,875 posts

281 months

WokingWedger

Original Poster:

1,030 posts

204 months

Saturday 3rd December 2016
quotequote all
igiveup said:
Thanks I saw that one.

Is that really as cheap as they come ?



737 FLF

171 posts

172 months

ClassiChimi

12,424 posts

148 months

Saturday 3rd December 2016
quotequote all
I've ordered the NGK iridium ones.
At 5000 miles service intervals for the standard plugs these seem a bargain over time. smile
I dunno if I'll have them in there for 30,000 miles but I'll give it a go hehe

Dr Mike Oxgreen

4,101 posts

164 months

Saturday 3rd December 2016
quotequote all
WokingWedger said:
Is that really as cheap as they come ?
They're a bargain when you consider that they'll last 5 times (or more) as long as a set of standard plugs.

QBee

20,904 posts

143 months

Saturday 3rd December 2016
quotequote all
You will also find that they stay cleaner and crisper than the ones they are replacing, so there is bound to be some fuel saving.

ClassiChimi

12,424 posts

148 months

Saturday 3rd December 2016
quotequote all
QBee said:
You will also find that they stay cleaner and crisper than the ones they are replacing, so there is bound to be some fuel saving.
What gap did you go for, In metric if you don't mind smile

QBee

20,904 posts

143 months

Saturday 3rd December 2016
quotequote all
Cannot remember, my butler fitted them.
I will check tomorrow for you.

ClassiChimi

12,424 posts

148 months

Saturday 3rd December 2016
quotequote all
QBee said:
Cannot remember, my butler fitted them.
I will check tomorrow for you.
laugh
0.7 to 1.0 mm I'm expecting
thumbup

QBee

20,904 posts

143 months

Saturday 3rd December 2016
quotequote all
ClassiChimi said:
QBee said:
Cannot remember, my butler fitted them.
I will check tomorrow for you.
laugh
0.7 to 1.0 mm I'm expecting
thumbup
In days of yore I set them at 25 thou on my 1967 Mini 850. Which would be 0.635mm. I have them to hand and will check tomorrow

ChimpOnGas

9,637 posts

178 months

Sunday 4th December 2016
quotequote all
With the exception perhaps of those running forced induction anyone still running shrouded electrode NGK B7ECS endurance racing plugs originally specified by TVR should at least replace them with a set of the far more suitable NGK BPR6ES. A set of 8 NGK BPR6ES are only £15 from Euro Car Parts if you buy them from their eBay shop, this is a high quality spark plug with an extended electrode so will immediately give you better combustion, being a hotter 6 rating rather than the cooler 7 chosen by TVR means you'll also eliminate the fouling associated with the inappropriate B7ECS.

If you want to take things a step further I can highly recommend going iridium, the NGK BPR6EIX iridium plugs will give further improvements in combustion which translates to a smoother idle and better throttle response. The service life of the BPR6EIX will be three times longer than the good old BPR6ES too (30,000 mls from BPR6EIX vs the 10,000mls from the BPR6ES).

The next step really doesn't offer improved combustion over the BPR6EIX but will extend service life still further, by adding a chip of pure platinum to the earth electrode the 30,000 mls service life of the BPR6EIX becomes 60,000mls with the Laser Iridium range from NGK.

Taking the Laser Iridium range from NGK to it's final conclusion are the LPG Laser range from NGK, these use the same iridium tip & chip of pure platinum on the earth electrode as the Laser Iridium range but use other higher end materials that you really don't need unless you are running LPG. The LPG Laser range from NGK are their highest end plug and the price reflects this, I use them because I run LPG and need total reliability and long service life on gas which is very hard on spark plugs.

I've always used the NGK brand because quite simply they're the best spark plugs in the world, NGK really revolutionised the world of spark plugs in the 1970's when spark plug failures were so common it was accepted as the norm to need to replace your plugs every 3,000 miles, often plugs failed even earlier than this. NGK changed all this overnight with their super high quality long lasting yellow box plugs and they've been developing even better products ever since, NGK do not sell snake oil products, if they make a claim for a new product it's because it does exactly what they say it does.

Saying that NGK's biggest competitor is fellow Japanese giant Denso, in 2015 Denso released their new TT range of spark plugs that are getting some rave reviews.

http://www.sparkplugs.co.uk/denso-iridium-tt-spark...

The Denso Iridium Twin-Tip Technology (TT) are the latest innovation in spark plug technology, NGK have admitted it's the way forward but are at least a year behind Denso only just having started making plugs with this system available on the Japanese market. So if you to enjoy the benefits of this new iridium twin-tip technology in the UK today you'll need to select the Denso TT product, personally I'll be waiting for the new NGK version expected to be released in Europe in 2017 but if you cant wait for that then the Denso TT part number for the Rover V8 is IW16TT.

http://www.sparkplugs.co.uk/denso-iridium-tt-spark...



http://densott.com/?utm_source=densoautoparts-irid...

https://www.youtube.com/watch?v=FC6VaS4kHGM

Edited by ChimpOnGas on Sunday 4th December 18:18

WokingWedger

Original Poster:

1,030 posts

204 months

Sunday 4th December 2016
quotequote all
Just ordered the Denso iridium twin tip.

I will report back !

QBee

20,904 posts

143 months

Sunday 4th December 2016
quotequote all
QBee said:
ClassiChimi said:
QBee said:
Cannot remember, my butler fitted them.
I will check tomorrow for you.
laugh
0.7 to 1.0 mm I'm expecting
thumbup
In days of yore I set them at 25 thou on my 1967 Mini 850. Which would be 0.635mm. I have them to hand and will check tomorrow
As I expected, the 0.6mm feeler gauge fitted and the 0.7mm gauge didn't. So they are set to 25 thousandths of an inch.

ClassiChimi

12,424 posts

148 months

Sunday 4th December 2016
quotequote all
QBee said:
As I expected, the 0.6mm feeler gauge fitted and the 0.7mm gauge didn't. So they are set to 25 thousandths of an inch.
As I thought, (CUX)
I'll go for 0.9/1.0 mm then as MBE can support a bigger gap.
Thanks for the info smile

N7GTX

7,823 posts

142 months

Sunday 4th December 2016
quotequote all
As in this old thread, you should never adjust the gap on NGK plugs as they come set to the correct gap.
http://www.pistonheads.com/gassing/topic.asp?t=125...

You must NEVER lever against the centre electrode or you will damage the iridium tip or the electrode. eeknono
Iridium plugs are lifed to 60,000 miles on some Toyotas and Lexus so you will probably never need to replace them idea