I have 52K on the original engine with no mods, til now.
I boughtBrisk racing plugs and gapped as close to 0.020 as I could -(the very end of my gapping tool). Recommended gap by Brisk is 0.018-0.020"; when I finished and went on a test run the engine sputtered at 4500-5000 and then the check engine light came on briefly. Should I double-check my gap and get it closer to 0.018: or is there something else I'm missing. The trouble light went out after a second run and the engine seemed to be a bit smoother - especially when it got over 5K; but it still sputters on hard acceleration - suggestions ?

 

Reduce the gap to 0.40mm (0.016 thou)

 

I'm having a similar issue after installing some Brisk plugs. I've got mine gapped as close to .018 as I could get. Since installation, I've noticed a little bit of wandering at idle (e.g. at a stop light). During MOTD, I noticed I was getting like a skip or sputter under heavy acceleration loads.

When I have time I plan to put the old plugs back in to see if that will help me verify whether it is the new plugs or something else. Might have to try reducing the gap some more.

On the plus side, I feel like the plugs have given some extra pep to the MINI and I am definitely getting better gas mileage.

 

hey czar
Thanks for the quick reply; I'll definetely close the gap --THANKS!

 

Thanks jcausefd!
I'm pretty sure that it's the plugs because that was the only change. Even with the hesitation & sputter the Mini does seem quicker.
Motor On!

 

Why bother changing them to another brand? The OEM NGK's work perfectly well.

 

Brisk plugs are silver

NGKs are iridium

Silver has higher thermal and electric conductivity.

 

Same reason I drive a MINI - wanted something different.

 

I installed the brisk plugs about a year and half ago before I had Jan tune my car and he found that the plugs didn't seat/seal well and I was getting some blow by. I put the stock plugs in and have had no issues. I would stay with the stock plugs.

 

Exactly!

 

thermal conductivity and electrical conductivity is higher... what about melting point? silver is 1763.474 F whereas iridium is 4370.0 °F. The silver will break down and be burnt off long before iridium.

 

Just a follow-up. I finally got around to swapping back in the old plugs. That did eliminate the stutter I was experiencing, so looks like my problem was definitely the plugs.

I tried to gap the Brisks down to as close to .016 as I could get and I've re-installed them. Rather difficult as the difference between say .016 and .018 is so small. Will give this a try and see what kind of results I get.

 

So I closed the gap as suggested to the .016 ( close tolerances ) and the sputter & hesitation went away. Is it better performance-wise? I dunno; I DO know that I didn't pay as much for these as what Mini wanted for OEM replacements.