Any diagnosis for this ?

[IanH755]

MRC used Bosch F5DPOR on 3 of the 900+ cars they've mapped that I know of (mine, Trups and the red 1024ps one). They are one step colder than OEM but they are also "side-firing" which supposedly reduces the tip temperature compared to traditional style plugs (so less chance of detonation).

One thing I saw on AudiSRS was Doug from MRC saying that these should be replaced every 10k miles on tuned engines, which is news to me as he never mentioned this when I picked up the car!

[Audi-RS6-R]

Thanks Ian...

I bought the NGK Race Plugs "9" - but seems to be too cold and causing sometimes missfires...so I will test the Bosch ones, which you recommend me.

[Audi-RS6-R]

MRC used Bosch F5DPOR on 3 of the 900+ cars they've mapped that I know of (mine, Trups and the red 1024ps one). They are one step colder than OEM but they are also "side-firing" which supposedly reduces the tip temperature compared to traditional style plugs (so less chance of detonation).

One thing I saw on AudiSRS was Doug from MRC saying that these should be replaced every 10k miles on tuned engines, which is news to me as he never mentioned this when I picked up the car!

Tried to send you a PM, but always it appears a message "This user does not exist"



I have ordered today the Bosch plugs which you recommend me...

Do I have to change the electrode distance, or leave the spark plugs like they are?

Greeting from Germany

Flexx

[IanH755]

You leave them as they are.

[Audi-RS6-R]

You leave them as they are.

Tried to answer your PM - don't work:

The requested users to be added do not exist.

[IanH755]

LOL, I'd report it to the forum mods incase their software is broken. In the meantime I've PM'd you my e-mail address instead!

[Audi-RS6-R]

LOL, I'd report it to the forum mods incase their software is broken. In the meantime I've PM'd you my e-mail address instead!

Thx Ian...for now I'm good - you answered my question already