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View Full Version : Best Spark Plugs TF LPG


p.nichols
05-01-2010, 04:25 AM
Hi Everyone, Does anyone have any suggestions on the best spark plugs for a 3.0L TF running LPG?

I'm looking at NGK BKR6EIX-11 which have a 1.1mm gap, can you get BKR6EIX with a 1.0mm gap or would I be ok to use standard BKR6EIX which I think are 0.8mm?

And should I go for BKR7EIX (if they exist) as it would be a colder plug?

Thanks..
alscall
05-01-2010, 01:45 PM
It's advisable to get the colder plug for LPG. (By one number)

I'm not sure about the gap thing although, I know mine were gapped, (smaller) by Steve Knight whilst he was tuning my car. It hasn't hurt it so far......
Dave TJ
05-01-2010, 03:58 PM
I'm with Al, one heat range colder than standard and keep that gap down around 0.7-0.8mm. I'm assuming you have a pre throttle body gas ring BBQ/fork lift unit. If it's direct gas injection you can open up the plug gap a little.

Cheers Dave
p.nichols
05-01-2010, 04:26 PM
I'm with Al, one heat range colder than standard and keep that gap down around 0.7-0.8mm. I'm assuming you have a pre throttle body gas ring BBQ/fork lift unit. If it's direct gas injection you can open up the plug gap a little.

Cheers Dave

Thanks..

Does anyone know what the "standard' gap size is on NGK plugs? I read somewhere it's .8 ? unless you get the BKR7EIX-11 / 10 etc..

And yes, it's the type of system that feeds the gas in before the TB.. I'd love Di LPG then I'd ditch the duel fuel.
SH00T
05-01-2010, 04:45 PM
Dave is right, though his comments are probably more relevant to sequential vapour injection.

The smaller .7 - .8 gap would best suit mixer LPG sytems to prevent pre-ignition and blowing up your air intake and air sensors.

Platinums or iridiums are favoured by installers for cars with spark problems.
p.nichols
05-01-2010, 05:28 PM
Dave is right, though his comments are probably more relevant to sequential vapour injection.

The smaller .7 - .8 gap would best suit mixer LPG sytems to prevent pre-ignition and blowing up your air intake and air sensors.

Platinums or iridiums are favoured by installers for cars with spark problems.

Cool, I'll go for BKR7EIX
Funny, I can order these from the UK for less than half what they are in Australia even with the shipping lol...
I better order them before the dollar dives...

Cheers.