Club 80-90 Forums

Hi, I'm working through a diy service etc and was wondering if anyone has any knowledge of my leads, they seem good quality but old. Lucas Silicone Speedleads (blue). Does anyone know anything about them?
Also, I seem to have NGK N7BY plugs in instead of the 6ET's, any thoughts on why?
Thanks
Nick

Sorry, 1.9 DG 1987
Nick

Yours should be either Bosch W7CCO (W7DTC is multi electrode equivelent)
if you prefer NGK then plain jane B6ES or BP6ET (latter also multi electrode)
Clearly N7BY is wrong...not even the correct heat range for an NGK plug.
Having said all of this their are probably several others suitable options (platinum, double/triple/ electrode of the same heat range and reach)
Martin

Cross reference Bosch to NGK
This table shows the some common Bosch/NGK equivalents.

Bosch NGK
W5A B7HS
W5AC B7HS
W5AP B7HS
W5AS B7HV
W5B BP7HS
W5BC BP7HS
W5BP BP7HS
W5C B7ES
W5CC B7ES
W5CCX B7ES-11
W5CP B7ES
W5CPX B7ES-11
W5CS B7EV
W5D BP7ES
W5D1 BP7ES
W5DC BP7ES
W5DCO BP7ES
W5DCX BP7ES-11
W5DP BP7ES
W5DPO BP7ET
W5DPX BP7ES-11
W5DTC BP6ET
W5E B7S
W5EC B7S
W5EP B7S
W6AS B6HV
W6B BP6H
W6BC BP6HS
W6BP BP6HS
W6D BP6ES
W6D1 BP6ES
W6DC BP6ES
W6DCO BP6ES
W6DCX BP6ES-11
W6DP BP6ES
W6DPX BP6ES-11
W6DTC BP6ET
W7A B6HS
W7AC B6HS
W7AO B6HS
W7AP B6HS
W7B BP6HS
W7BC BP6HS
W7BP BP6HS
W7C B6ES
W7CC B6ES
W7CCO B6ES
W7CCX B6ES-11
W7CP B6ES
W7CPX B6ES-11
W7CX B6ES-11
W7D BP6ES
W7DC BP6ES
W7DCO BP6ES
W7DCR BPR6ES
W7DCX BP6ES-11
W7DO BP6ES
W7DP BP6ES
W7DPX BP6ES-11
W7DTC BP6ET
W7DX BP6ES-11
W7E B6S
W7EC B6S
W7EP B6S
W7F BP6S
W7FC BP6S
W7LTCR BUR6ET
W8A B5HS
W8AC B5HS
W8AO B5HS
W8AP B5HS
W8B BP5HS
W8BC BP5HS
W8BP BP5HS
W8C B5ES
W8CC B5ES
W8CCX B5ES-11
W8CO B5ES
W8CP B5ES
W8D BP5ES
W8DC BP5ES
W8DCO BP5ES
W8DCX BP5ES-11
W8DCY BP5ES-13
W8DP BP5ES
W8DPX BP6ET
W8DX BP5ES-11
W8E B6S
W8EC B6S
W8F BP5S
W8LCR ZGR5A
W8LTCR BUR5ET
W8LPR ZGR5A
W8FC BP5S
W9A B-4H
W9AC B5HS
W9ACO B5HS
W9AO B-4H
W9C B4ES
W9CC B4ES
W9D BP5ES
W9DC BP5ES
W9DCX BP5ES-11

Thanks everyone. Despite a slight change in running, the previous happiness of my engine has me in the old 'if it ain't broke' don't fix it' quandary, but worried about heat range!
Nick

Getting confused now! My plugs aren't listed by NGK and they don't list any starting with an 'N' , the BY suffix refers to a 'special design, grooved electrode, and the heat range is dropped one i.e. colder. All of which make me slightly concerned about going back to standard heat range as that would be going back up in heat, which I remember as being dangerous unless you know your engines history.
Any ideas, comments welcomed. I was wondering if this is a bug trick or something, I know I had to drop one colder with grooved electrodes (which were a new thing to me in the '80's on my old A10 when I high comped and spitfire cammed it, or...?
Nick

Tis a tricky one....
See this:
http://www.ngksparkplugs.com/tech_suppo ... p?mode=nml" onclick="window.open(this.href);return false;

Basically moving towards a colder plug (especially in the colder winter months) could result in a fouling plug as it may not be running at it's optimum temperature.
This may not be imediately apparent and may (or may not) be an issue in several weeks/months where you may experience missfiring and poor starting.
Martin

Personally, I'd take the easy option and go to Brickwerks website and get the plugs that Baxter uses in his garage for these vans on a daily basis:
Brickwerks plugs

Tony

There is no definitive answer....what you have to appreciate is that there are many designs and several different electrode materials and in theory, as long as the reach (how long the thread is) and the heat range (the operating temperature range) are both correct, you could choose from many variants.
For example:
Bosch or NGK....just a plain Jane single electrode non resistor type, or perhaps one with copper core or platinum core, or double electrode or triple electrode or quadruple electrode or perhaps with a shaped electrode ie: U groove/V groove...and then most withor without the option of ballasted resistor (for radio supression) ALL CORRECT AS LONG AS REACH AND HEATRANGE REMAIN THE SAME.
There are literally at least a dozen options you could choose from BUT and this is the big BUT! surely it is wise to go with recommendation and what others have found to work best (all will work but some will be more suited to the engine type)
Confused? don't be! just pick either plain Jane (short service interval Bosch W7CCO or NGK B6ES) OR plugs designed to have a longer life: Bosch W7DTC or NGK BP6ET (the spark basically eats away the electrode and because these types have multi electrodes they last longer)
As a side note* all of these plugs come with a resistor variant ie: BPR6ET instead of BP6ET (just means one has radio suppression and doesn't interfere with the neighbours telly) personally...as a very loose rule of thumb, you only need resistor plugs if your plug leads do NOT have resistor caps...so if you have original beru type metal shrouded spark plug caps there is no need for resistor plugs.
Martin

Thanks everyone. Gone with standard Bosch's from Brickwerks.
Nick