UrS4boy

For "normal" engines, probably up to RS2 levels of horsepower, the Bosch F5DPOR plugs have had a good track record. However, during the AAN ejecting sparkplug thread on Audifans that I started, Dave Dawson and Hap McGuire both posted that in their high hp (well over 400 whp)engines, they have had problems (expensive problems) with the F5DPOR plugs failing (tip/electrode breaking off, causing cylinder damage). They have switched to other brand plugs. Others chimed in with their alternatives:

Dave D. is now running NGK Iridium BKR7EIX plugs.

Jonathon K switched to NGKs. BKR7Es in there at the moment but is switching to Iridium 8s (BKR8EIX) at the next change.

Scott J said "I'm a huge fan of the TDC (triple copper) Bosch plugs, they are virtually indestructable IME.? When going Platinum or irridium, NGK has a better product, IMO.? IIRC, the neu S4 swapped to NGK application.?"

Just posting information, not making any recommendations

YMMV

20VT90q

They're tri-electrode coppers.

maciu

2 years without any problems

car was running partially stock and partially
chipped (1.4bar) also for some time LPG
installation was in use<ul><li><a href="http://i13.photobucket.com/albums/a258/maciu/Audi-misc/DSC07576.jpg">Denso</a></li></ul>

UR-maninblack

F6DTC's work well... just don't last very long

UrS4boy

Probably what Scott J was mentioning (he said "TDC" (sic))

Herr Schröder

I had two plugs seperate at the base, and they had less than 1,500 miles on them (as you'll recall, the car had very basic mods). They were bad enough that it sounded like a lifter tick at idle. Thankfully we caught them before they came completely apart.

That said, I'm still running them in Cody's car (and he's always run them IIRC), but I have a set of the NGK's setting on the bench to install, just to play it safe.

I suspect I simply got some plugs from a bunk batch, or something has changed overall in the manufacturing process / QC department at Bosch, but who knows..

javdub

kinda new at this dude gimme a chance to get use to where what is, and thanks for the link

neo-tt

any comments for this sparks?