I have now used those plugs of mine up to 35psi so far with no issues.
Same exact plugs I use they haven't given me any issues I have em gapped to .022 and no misfires at 31psi, the car made over 600whp with no problems with these plugs, and they cost about $3 a plug.
DCPR8E NGK copper. we use stock gap and change every 10k-15K miles. So far so good for me. 12psi fyi.
I still use stock gap on my DCPR9EIX on my turbo R with no missfires.
Running NGK DCPR9EIX gapped to .022" with no misfire issues.
The 9s are good. Considering I have run them anywhere from 15psi to 36psi of boost and they have performed flawlessly I would say that they work well.
I replaced the spark plugs earlier. The new spark plugs is NGK PFR6Q from Checkers. It is gap @ .032. The old spark plugs are the very cheap Autolite. The previous owner probably tried to save money, but it end up cause me a lot of trouble. The gap of Autolite plugs are more like .042. I drove it a couple blocks I installed the NGK, and it felt better.
Stock on mine was .032, but my buddy's GLI was gapped from the factory at .029. I gapped my NGK iridiums at .028. I broke two plugs in the process...gapping iridiums with a normal gapping tool doesn't work!!
I took a peak at mine the other week and the gap was HUGE so gapped them down to .035 and now cold starts are ROUGH. The pugs in there suck, anyway - old autlites.
I just did mine not too long ago and bought the NGK's @ Advanced but they claimed that it had to be gapped @ 0.032 but when I took the old ones out, the bosch we gapped @ 0.030. I put the new ones in and you can feel it not running as smooth but I've been too lazy to find some gapped @ 0.030.
Write your review
Help others - share your experience with this part.
Voted AGAINST engine oil RAVENOL on the rating page
The brake caliper FEBI got the first review!
The drive shaft OEM BMW got the first review!
The brake cylinder Metelli got the first review!
For tires OEM Toyota already 25 reviews.
For brake caliper OEM Volkswagen already 25 reviews.
In the rating best fuel pump already 5 brands participate!
In the rating best head gasket already 3 brands participate!
In the rating best antifreeze already 9 brands participate!
In the auto rating brake discs for Volkswagen Golf already 10 brands participate!
In the auto rating oil filter for Volkswagen Passat already 5 brands participate!
In the auto rating brake pads for BMW M2 already 5 brands participate!
For wiper blades PIAA already 100 reviews.
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
