25 replies to this topic

[robminibcy]

Hi, got my mini running spot on today:-). however I took out spark plug no1 to confirm id set fuelling up more or less correct with colour tune and the ceramic bit at the top snapped of the spark plug (not colour tune). as a result I want get some asap (today!). up until now ive always used champion N9YC and always ran very nicely. however I am going to have to get spark plugs from Halfords as its the only place I can guarantee having stock and being open.

 

they don't seem to do the n9yc so I will get ngk ones.

 

im not sure out of BPR6ES and BP6ES which will be best for my car though. its a 79 998 with accuspark electronic ignition conversion and a lucas sport coil. also what should the gap be. up till know ive always set it to the recommendation in Haynes. ive read though that the gap can be increased for a slight power advantage when running electronic ignition?

 

Cheers

 

 

 

 

 

[TehMarchant]

The BPR6ES Have resisters built in to suppress ignition noises towards mobiles and radio.

 

So get them if you have any electrics on board.

[KernowCooper]

NGK BPR6ES and you can try 30thou

[DILLIGAF]

The BPR6ES Have resisters built in to suppress ignition noises towards mobiles and radio.

 

So get them if you have any electrics on board.

 

 

NGK BPR6ES and you can try 30thou

 

The N9YC isn't a resistor plug, the equivalent NGK is the BP6ES..........

[KernowCooper]

Yes we know that, but he asked what will be the best for his car, not whats the equivalent.

[DILLIGAF]

So if he's running N9YC's now chances are he's got restrictive leads and your recommending restrictive plugs...............

[TehMarchant]

So if he's running N9YC's now chances are he's got restrictive leads and your recommending restrictive plugs...............

And I am running a resister on the coil and resistive plugs and probably resistiveHT leads.

[KernowCooper]

So if he's running N9YC's now chances are he's got restrictive leads and your recommending restrictive plugs...............

Hes not on a race track so RFI is important, so Restive plugs are not like when they came out in the fifties when you were a young man.

 

Each time the spark jumps across a gap, an electromagnetic field is created that can interfere with radio signals, By placing a resistor in the spark plug, you can substantially reduce RFI,

 

So are you saying if you run restive plugs you can then run non resistive copper leads?

 

In fact EEC Regs. demanded that all NEW vehicles be suppressed (against break-in)  to cover  40 to  250 MHz for TV & VHF radio bands  (MW was much less affected).  This was during the 1970's and is still a current requirement today.

 

You may also be under the old impression of a resistor reduces the spark ? Not So

 

Since the resistor is an obstacle it forces the spark voltage to be higher, assuring combustion in a lean mixture better.

Edited by KernowCooper, 17 August 2013 - 12:56 AM.

[DILLIGAF]

 

So if he's running N9YC's now chances are he's got restrictive leads and your recommending restrictive plugs...............

And I am running a resister on the coil and resistive plugs and probably resistiveHT leads.

 

 

 

 

 

So if he's running N9YC's now chances are he's got restrictive leads and your recommending restrictive plugs...............

Hes not on a race track so RFI is important, so Restive plugs are not like when they came out in the fifties when you were a young man.

 

Each time the spark jumps across a gap, an electromagnetic field is created that can interfere with radio signals, By placing a resistor in the spark plug, you can substantially reduce RFI,

 

So are you saying if you run restive plugs you can then run non resistive copper leads

 

Read what I said...........

[robminibcy]

I'm using these ht leads. http://minispares.co...arch/classic/ht leads.aspx|Back to search

 

I take it then that its going to be best to go for the resistor plugs?! And that they are not going to have a negative effect on performance with the current setup?

Edited by robminibcy, 17 August 2013 - 01:06 AM.

[DILLIGAF]

In that case like I said you don't want resister plugs, you want BP6ES..........

[KernowCooper]

And if he has a radio then he will get RFI noise !

 

The resistor dampens the spark’s electrical noise, with little effect on plug voltage, since there is a surplus of unused voltage at the coil anyway.

Edited by KernowCooper, 17 August 2013 - 10:38 AM.

[Badboytunes]

I run NGK BPR6ES. No interferance on the radio.

 

Job done.

[DILLIGAF]

And if he has a radio then he will get RFI noise !

 

The resistor dampens the spark’s electrical noise, with little effect on plug voltage, since there is a surplus of unused voltage at the coil anyway.

 

Have a look at the link they are suppressed leads.........

 

Which require non suppressed plugs.........

[KernowCooper]

They dont require them, you need to brush up on a few of current electrical developments which have happened since you last looked.