spark plugs

[Jonny weggie]

Going to change my plugs which are NGK B7, someone told to fit NGK trispark plugs,has anybody else tried these plugs or would it mess up things.
john.

[rev-erend]

Best stick with B7 ECS.

They are the best out there.

[Jonny weggie]

Thanks Alan.

[chedder]

Hi Jonny! I used to run the Bosche variant of these, no gap to set and worked really well, only went back to the 'old' style when the Emerald was set up.
Plugs worked great and produced a spark even when wet! May get round to putting them back in one day.

Chedder

[ed_crouch]

I use NGK BR7ES because my ecu needs resistive plugs.

[honestjohntoo]

ed_crouch said:

I use NGK BR7ES because my ecu needs resistive plugs

Ed, can you expand on the relationship between the (efi?) ECU and resistive spark plugs.

[Jonny weggie]

thanks lads, i've also been told to use B7ES plugs as they suit that type of engine.
cheers jonny.

[B@man]

ed_crouch said:

I use NGK BR7ES because my ecu needs resistive plugs.

+ 1

This is something to do with the reduction in electrical noise, which doesn't effect the Lucas FI but when you switch over to Emerald,MS, OMEX (or Megajolt in my case) non resistive plugs can cause misfires even if you have resistive leads fitted.

Edited by B@man on Thursday 29th April 12:51

[ed_crouch]

Not entirely sure - IIRC its to reduce EM coupling into things like sensor leads which then transport the noise back into the ecu. Either way, EM suppression gets important when you're using more complicated engine management, and resistive plugs help...