Plugs

[andru1313]

What are the best spark plugs to run for Stage 2+? I am going to be doing some service work on the car and just want to do it all at once. Thanks.

[SilverSurferS4]

i only hear good things about the bosch side fire spark plugs...

[andru1313]

thoughts on going a grade cooler on the NK's?

[AudiSportB5S4]

i had the grade cooler when i was 3- for a while (6 months) i had some misfiring at idle issues.... NOW switched over to side fire F5DPOR plugs (bosch platin side fire) and my exhaust note actually changed, engine runs much smoother etc. very happy with them.

[BITRBO]

anybody else with some experience with these...?

[BastardS4]

I really dont like the construction quality of these things. I know they are being used, but the ground strap weld is crap.

[chris23]

I hear this is the way to go, helps avoid pre detonation i belive.

[lrg8683]

I really dont like the construction quality of these things. I know they are being used, but the ground strap weld is crap.

the bosch ones?6

[raketeS4]

I've been very happy with my NGK BKR7E's. They cost $2/plug and that's hard to beat

[quickaudi]

depends on who's software you have
Giac is actually tuned for stock plugs.

[The_Jerbel]

i had the grade cooler when i was 3- for a while (6 months) i had some misfiring at idle issues.... NOW switched over to side fire F5DPOR plugs (bosch platin side fire) and my exhaust note actually changed, engine runs much smoother etc. very happy with them.

Your Bosch plugs are one range cooler than stock as well...

[SoEvoL]

I've been very happy with my NGK BKR7E's. They cost $2/plug and that's hard to beat

x2, you change yours with every oil change?

[BITRBO]

x2, you change yours with every oil change?

daaaamn. definitely not my slice of pie^^^

So between this and the other threads I've read, I think we've got the following (in relative order of cost, longevity, and misfire resolution):

1. NGK PFR6Q's

2. NGK PFR7Q's

3. NGK BKR6E's

4. NGK BKR7E's

5. Bosch F6DTC's

6. Bosch Platin F5DPOR "Side Fires"


...and gapped at 0.028" (with the exception of the F5DPOR's that come pregapped). Obviously this is a very subjective topic, but does the ordering appear generally correct?

[MikeS]

I recently changed my plugs to the NGK BKR7E's and now I have random misfires. I am Stage 3 (AWE), and I gapped them to .028". I was thinking of trying to gap them to .032 to see if it clears, but if not, I am switching to the stock plugs.

[BITRBO]

I went with the "side fires" so we'll see if the hype holds true... I'll report back soon.

[raketeS4]

x2, you change yours with every oil change?

yup... takes about 20 min, no biggie

[lsc2g]

i just swapped in some bkr6e's on my stage2 as my plugs haven't been changed in like almost 4 years!! yes i'm bad lol
anyways car is much smoother, noticeably faster now and took like 40 minutes for DIY changover..

[Dimcorner]

So finished my first tank of gas after plug change...
20mpg 90% city. Pretty crappy. I think I need to change the gap on it. right now is at .030 on a completely stock S4. Any recommendation on gapping?

[The_Jerbel]

0.026

[Dimcorner]

Doh!