Plug gap

[mild2wild]

Does any one know the correct gap for B7ECS plugs, when fitted to Rover V8

[kevinday]

Answer is probably in Steve's Wedge Bible

[shpub]

Sure is... 0.9 mm or 35 thou ish

[jellyed]

30 thou

[mild2wild]

Just checked with V8 Developments who built the engine 30 thou is correct, not 35

[shpub]

I always believe in going with what the engine developer says but the Rover V8 docs that I have all use 35 thou.

Also chceked my TVR docs and they say 35 as well.

Anyway it's your choice...


>> Edited by shpub on Friday 26th July 06:46

[mavrick]

I have always used 31 thou... for several reasons..

25 & 6 on the feeler gages

plus too big a gap will not fire but a slightly
smaller one will always - down side maybe not the
ultimate spark.

Also - if the car is all new you could run 35 but if
its not say 3 ~ 5 years old then you could run the
risk of mis-fires & un-burnt fuel getting to the Cat.

It's normally best to err on the safe side.

[shpub]

I've checked about 20 odd sources today and the majority are 0.9mm 35 thou and a couple at 0.8mm 30 thou. RPI hedges its bets and says 0.8 to 0.9mm...

The gap is not as critical as it used to be because the ignition system is electronic and develops are very mighty high voltage jolt.

Anyway guys, it's your engine and your call.
The concensus is 0.9/35 though.




>> Edited by shpub on Friday 26th July 10:18

>> Edited by shpub on Friday 26th July 10:20