12 replies to this topic

[Anthony]

998 City E
1987

Just wondering. On points ignition non resister plugs are used, in this case BP6ES. If you change to the igniter electronic system should resistor plugs be used?

What causes the need for resistor plugs in the stock electronic system?

Ta

Anthony.

One more thing, has anyone else had trouble with NGK plugs? Have had two sets now and both have failed miserably early. I will only be buying champion from now on.

[WiredbyWilson]

Not sure about the plug number but I have Golf plugs in mine due to the weber i run, but i only ever use NGK and have never had a problem. When you say they fail in what way? stop sparking? foul up easy??

[Anthony]

Not sure about the plug number but I have Golf plugs in mine due to the weber i run, but i only ever use NGK and have never had a problem. When you say they fail in what way? stop sparking? foul up easy??

Yeah, both sets I've had one plug has just failed which caused misfiring, starting problems etc. etc. So they have lost my custom.

[WiredbyWilson]

Not sure about the plug number but I have Golf plugs in mine due to the weber i run, but i only ever use NGK and have never had a problem. When you say they fail in what way? stop sparking? foul up easy??

Yeah, both sets I've had one plug has just failed which caused misfiring, starting problems etc. etc. So they have lost my custom.

Are you sure it was the fault of the plugs, as you say 2 sets have done this? May be worth checking if they are overloaded / getting burnt out by ignition problems.

One set could be a dodgy plug - 2 sets would get me thinking there is something else going on. As for champion plugs - i have steered clear for years, and NGK are used in racing for a reason i believe....

[Anthony]

Not sure about the plug number but I have Golf plugs in mine due to the weber i run, but i only ever use NGK and have never had a problem. When you say they fail in what way? stop sparking? foul up easy??

Yeah, both sets I've had one plug has just failed which caused misfiring, starting problems etc. etc. So they have lost my custom.

Are you sure it was the fault of the plugs, as you say 2 sets have done this? May be worth checking if they are overloaded / getting burnt out by ignition problems.

One set could be a dodgy plug - 2 sets would get me thinking there is something else going on. As for champion plugs - i have steered clear for years, and NGK are used in racing for a reason i believe....

Well this is the reason I asked the question about resitor and non resist plugs. You know anything about them?

[WiredbyWilson]

well im running a 1988 mini, and rang my uncles supplier and said i wanted a plug for my mini (they picked it up from reg) and needed a higher heat rating.

think they are either BK6ES or BK6RES but without going out to the car in the cold damp fog I can't tell you. Have you got a Haynes manual? do you know if yours is ballast resisted or not?

[Anthony]

well im running a 1988 mini, and rang my uncles supplier and said i wanted a plug for my mini (they picked it up from reg) and needed a higher heat rating.

think they are either BK6ES or BK6RES but without going out to the car in the cold damp fog I can't tell you. Have you got a Haynes manual? do you know if yours is ballast resisted or not?

On carb minis with points in the dizzy (as mine was) they used non resistor plugs, BP6ES in my case. On later injection minis they had electronic dizzies. On these resistor plugs were used; BP6RES, the R being resist or resistor or whatever.

My query is do I need to used the resistor plugs now that I have changed to leccy ignition?

[WiredbyWilson]

I think it is related to the type of coil you have, as one kicks 9v and the other 6v (please correct me if im wrong).

Not sure whether leccy ignition makes a difference. I have a aldon dizzy that was originally on points, but im now using a land rover leccy conversion and didn't change the plugs and have noticed no adverse effects.

I will check my plugs out tomorrow and let you know if you haven't sorted it by then

[Anthony]

I think it is related to the type of coil you have, as one kicks 9v and the other 6v (please correct me if im wrong).

Not sure whether leccy ignition makes a difference. I have a aldon dizzy that was originally on points, but im now using a land rover leccy conversion and didn't change the plugs and have noticed no adverse effects.

I will check my plugs out tomorrow and let you know if you haven't sorted it by then

Just for your last post, it is a ballast ignition running aldon/pertronix igniter and lucas ballast sports coil.

Edited by Anthony, 14 January 2009 - 10:15 PM.

[dklawson]

The choice of resistor vs standard plugs really isn't a function of the ignition type.

The plug type depends on what type of spark plug wires you have. If you have resistor wires you use standard plugs. If you have solid core wires you run resistor plugs. The goal is to have some resistance (in either the plug or the wires) to suppress radio noise. Running solid core wires with standard plugs can make an awful lot of radio frequency noise. Running resistor plugs with resistor wires can make for a weak spark.

[Anthony]

The choice of resistor vs standard plugs really isn't a function of the ignition type.

The plug type depends on what type of spark plug wires you have. If you have resistor wires you use standard plugs. If you have solid core wires you run resistor plugs. The goal is to have some resistance (in either the plug or the wires) to suppress radio noise. Running solid core wires with standard plugs can make an awful lot of radio frequency noise. Running resistor plugs with resistor wires can make for a weak spark.

Ah OK. I don't know whether my leads are resistor or not. They are the Rover "performance" leads from Minispares.

[lrostoke]

Was searching round for info on this after reading Dougs information, mines been suffering with radio noise, and now I check my plugs are BP6ES.

I'm going to try BPR6ES now because that is the whole point of these plugs to cut down electrical interferance..which can interfer with some electrical items on cars, control units, electronic ignition etc..
Hence why the injection minis had the BPR6ES plugs they have that bit more electro trickery than the older models.

I'm running Lumination performance HT leads, Aldon ignitor thinking back I reckon my radio noise started when I fitted the HT leads.

**** update *****

Fitted the BPR6ES plugs, all seems well, and radio noise seems to have gone

Edited by lrostoke, 15 January 2009 - 04:56 PM.

[Anthony]

Was searching round for info on this after reading Dougs information, mines been suffering with radio noise, and now I check my plugs are BP6ES.

I'm going to try BPR6ES now because that is the whole point of these plugs to cut down electrical interferance..which can interfer with some electrical items on cars, control units, electronic ignition etc..
Hence why the injection minis had the BPR6ES plugs they have that bit more electro trickery than the older models.

I'm running Lumination performance HT leads, Aldon ignitor thinking back I reckon my radio noise started when I fitted the HT leads.

**** update *****

Fitted the BPR6ES plugs, all seems well, and radio noise seems to have gone

I'll try the BPR6ES plugs then.

Ta