for the ngk anoraks out there...

[anonymous-user]

for those that have made the change to 6418 from 3199 is the difference perceptible and if so, in what way? im about to break with tradition in my alpina b3s

[Krikkit]

Purely out of interest, why are you changing?

[anonymous-user]

im not until i get a reason to but i am hearing and reading that those that have made the change say its for the better but i dont know if its placebo affect...

ngk do cite it as the upgrade to the 3199
https://www.ngkpartfinder.co.uk/catalogues/cars/se...

Edited by anonymous-user on Wednesday 12th August 18:14

[Maxym]

This thread must be in some sort of code...

[anonymous-user]

i did forewarn about the ultra geeky nature!

[Haltamer]

6418 Just looks to be the identical Iridium equivalent?

(The other plug is Platinum) - Should last a bit longer, wouldn't expect 100HP Gains, but given the price difference is £3 I'd probably go for it.

[anonymous-user]

yep seems that way... given the plugs are changed every other service (inspection 1 and 2 are the same in this instance) i was wondering if it was just about longevity vs performance

[trickywoo]

Is there a Denso TT equivalent?

I recently put some of these in a Swift Sport and really noticed the difference. I’m sure it’s not placebo because I have two swift sports and the other one has always felt livelier to me but since changing to Denso the situation is reversed. I’m sure the Denso one also catches faster on the starter too.

[GreenV8S]

trickywoo said:

I’m sure it’s not placebo because I have two swift sports and the other one has always felt livelier to me but since changing to Denso the situation is reversed.

I can't see how it would make any difference to power output unless the previous plugs were faulty and causing a misfire. Once the charge is lit, it's lit.

[Getragdogleg]

GreenV8S said:

Once the charge is lit, it's lit.

The heat range is to do with how well the plug self cleans so selecting the correct plug for your engine and the way it is used can make a big difference in power under the right foot!

[trickywoo]

GreenV8S said:

I can't see how it would make any difference to power output unless the previous plugs were faulty and causing a misfire. Once the charge is lit, it's lit.

Doesn’t it depend to some extent on how it’s lit?

[GreenV8S]

Getragdogleg said:

The heat range is to do with how well the plug self cleans so selecting the correct plug for your engine and the way it is used can make a big difference in power under the right foot!

The plugs do need to have the appropriate temp range, but in this case it looks like the OP is comparing plugs with the same temp rating. In that case the only real difference is the price, and the service interval.