Spark Plugs

Technical advice Q&A

Topic author
Simon S
Posts: 6
Joined: Thu Oct 19, 2017 12:56 pm
Great Britain

#1 Spark Plugs

Post by Simon S » Mon Aug 10, 2020 1:33 pm

I've just bought some Champion N9YC plugs to replace existing plugs. Have always used Champion, but the new ones look cheap, nasty and almost fake.
Anyone got any preferences? I've got an MSD Ignition system and thinking of using NGK BP5ES plugs and leaving gap factory set at 35 thou.
Thoughts appreciated

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Heuer
Administrator
Posts: 13399
Joined: Sat Mar 01, 2008 5:29 pm
Location: Nottinghamshire
Great Britain

#2 Re: Spark Plugs

Post by Heuer » Mon Aug 10, 2020 2:18 pm

If you have any electronics in the car (ignition, satnav, phone etc) you should fit Resistor plugs to avoid interference. The NGK BPR5ES plugs (note the 'R' in the part number) are what I use and they are excellent.
David Jones
S1 OTS OSB; S1 FHC ODB

Add your E-Type to our World Map: viewtopic.php?f=1&t=1810

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

rswaffie
Posts: 1178
Joined: Sat Jul 19, 2014 7:56 am
Location: Lincolnshire
Great Britain

#3 Re: Spark Plugs

Post by rswaffie » Mon Aug 10, 2020 2:20 pm

:yeahthat:
Richard

S1 3.8 FHC Opalescent Golden Sand with Tan Trim 889504
Now running-in my diy nut ‘n’ bolt restoration. :wrench: :hammer: :fingerscrossed:

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
Simon S
Posts: 6
Joined: Thu Oct 19, 2017 12:56 pm
Great Britain

#4 Re: Spark Plugs

Post by Simon S » Mon Aug 10, 2020 4:51 pm

Thanks for the advice.
The car has had Champion N9YC in it since I got it. I've been using a plug in SAT Nav without problems, and never heard interference on my phone (which of course I don't use while driving - couldn't hear it anyway) No radio in car. So....is a resistive plug really necessary? I have the basic BP5ES ready to go

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

Heuer
Administrator
Posts: 13399
Joined: Sat Mar 01, 2008 5:29 pm
Location: Nottinghamshire
Great Britain

#5 Re: Spark Plugs

Post by Heuer » Mon Aug 10, 2020 5:01 pm

For the cost I would certainly recommend the resistor plugs especially as you have a MSD ignition system. Bear in mind it can affect other road users even if you don't see a problem. You may get away with it but if you start noticing misfires then the non resistor could be the cause. This explains things:

ImageImage

"At the moment the spark jumps the gap it causes a high frequency burst of energy, this is known as RFI (radio frequency interference). This is why resistor spark plugs were introduced in the mid 1960's. Placing a resistor within the spark plug suppresses the RFI. Without resistor plugs in your car you can experience static on your radio as well as interference with other sensitive electronic equipment. Some later model vehicles as well as newer Powersport engines must use resistor plugs for a proper "talkback" to the electronic ignition. As a rule, performance is in no way impaired by resistor spark plugs."

Image
David Jones
S1 OTS OSB; S1 FHC ODB

Add your E-Type to our World Map: viewtopic.php?f=1&t=1810

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
Simon S
Posts: 6
Joined: Thu Oct 19, 2017 12:56 pm
Great Britain

#6 Re: Spark Plugs

Post by Simon S » Mon Aug 10, 2020 5:34 pm

You're right - since there are only pennies difference in price, I wonder why all plugs aren't made with resistors. Come to think of it, just why are there so many types??

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

splosh
Posts: 77
Joined: Thu Jul 31, 2014 12:03 am
Great Britain

#7 Re: Spark Plugs

Post by splosh » Mon Aug 10, 2020 8:53 pm

Simon, if you have any doubt and think they are fake - then you could be correct.

I bought some NGK plugs for my other car (aston martin V8) from Ebay.
I ran the car last June after fitting them on a very long European road tour. Firstly we thought it was the E5 / E10 fuel abroad for the coughing and spluttering. No. On return to the UK I bought a new set from a reputable dealer being Opie oils and I compared them firstly side by side with new and old.
It was alarming and very apparent the difference in the manufacturing marks, identification marks and alarmingly how smoother the engine instantly ran after the replacements were fitted.
Smoother idle and more mpg.

All I can say is caveat emptor and buy your plugs from a reputable source as the market is flooded with fake plugs.
Clive
August 1961 Flat floor ots

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

malcolm
Posts: 1807
Joined: Fri Jan 03, 2014 10:44 am
Location: Fleet
Great Britain

#8 Re: Spark Plugs

Post by malcolm » Tue Aug 11, 2020 8:30 am

splosh wrote:
Mon Aug 10, 2020 8:53 pm

All I can say is caveat emptor and buy your plugs from a reputable source as the market is flooded with fake plugs.
Quite right, although unfortunately, reputable sources can also unwittingly buy fakes. The same thing happens with pharmaceuticals. So the reputation of the supplier doesn't ensure the authenticity, but does of course make it more likely you're getting the real McCoy
Malcolm
I only fit in a 2+2, so got one!
1969 Series 2 2+2
2009 Jaguar XF-S

Link:
BBcode:
HTML:
Hide post links
Show post links


Joes66
Posts: 100
Joined: Sun Apr 26, 2020 7:16 am
Great Britain

#9 Re: Spark Plugs

Post by Joes66 » Tue Aug 11, 2020 7:46 pm

Its well known that there are fake spark plugs on e bay
Joe
1969 series 2 2+2

Link:
BBcode:
HTML:
Hide post links
Show post links


Gfhug
Posts: 2146
Joined: Thu Jun 19, 2014 3:08 pm
Location: Near Andover, Hampshire,in D.O. Blighty
Great Britain

#10 Re: Spark Plugs

Post by Gfhug » Tue Aug 11, 2020 8:10 pm

Joes66 wrote:
Tue Aug 11, 2020 7:46 pm
Its well known that there are fake spark plugs on e bay
Joe
Strangely I’ve never heard of that, though I don’t buy spark plugs from fleabay I’d say that is a bit of a generalisation to imply we should all know that :shrug:
S2 FHC Light Blue
S2 OTS LHD - RHD full restoration

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

splosh
Posts: 77
Joined: Thu Jul 31, 2014 12:03 am
Great Britain

#11 Re: Spark Plugs

Post by splosh » Tue Aug 11, 2020 8:42 pm

C19F4298-9A94-459E-893D-A853E65E1DED copy.jpg
C19F4298-9A94-459E-893D-A853E65E1DED copy.jpg (80.82 KiB) Viewed 385 times
This photo is of fake ones currently for sale on Ebay.
34CECA0D-B12A-42A0-B559-32CE4975FB4E_4_5005_c.jpeg
34CECA0D-B12A-42A0-B559-32CE4975FB4E_4_5005_c.jpeg (18.06 KiB) Viewed 385 times
In this case the Fake ones have blue logo, and genuine ones have black logo and black insulator bands.
30D510B3-DAB1-4E3C-AFAD-CA12B5208F5E copy.jpg
30D510B3-DAB1-4E3C-AFAD-CA12B5208F5E copy.jpg (86.64 KiB) Viewed 385 times
Clive
August 1961 Flat floor ots

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

splosh
Posts: 77
Joined: Thu Jul 31, 2014 12:03 am
Great Britain

#12 Re: Spark Plugs

Post by splosh » Tue Aug 11, 2020 8:46 pm

and how they are assembled in China ??!!
20ABD708-5F8A-412E-A4AF-A99AB3F18DDB_4_5005_c copy.jpg
20ABD708-5F8A-412E-A4AF-A99AB3F18DDB_4_5005_c copy.jpg (24.63 KiB) Viewed 383 times
Clive
August 1961 Flat floor ots

Link:
BBcode:
HTML:
Hide post links
Show post links


Gfhug
Posts: 2146
Joined: Thu Jun 19, 2014 3:08 pm
Location: Near Andover, Hampshire,in D.O. Blighty
Great Britain

#13 Re: Spark Plugs

Post by Gfhug » Tue Aug 11, 2020 9:00 pm

So we all have those photos of the assembly line? :banghead:
S2 FHC Light Blue
S2 OTS LHD - RHD full restoration

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply Previous topicNext topic