I use 3922s as per ur suggestion, and are doing fine... no issues.
However, my AFR reads 16.5 at idle, and goes down to high 14s to low 15s when I'm really on it.
Am I too lean?!
Max boost is 14-15, as per the gauge... Meth is set to start at 6psi, and full flow at about 13.
Plugs look white-ish, when I pull them out.
What am I doing wrong?
Do I go higher with the meth, or lower??
Quote:
| Originally Posted by xxxJohnBoyxxx Run the 3922. I've run them for years and they are the only plugs I run. They are cheep but are copper which is the best conductor. They also hide the ceramic and tip in the plug so it is not exposed to the combustion process which is much safer on a boosted motor. I change mine every 10,000 miles. Autolite 3922 are cold plugs and the best by far, I have turned on a few people to these with boosted motors and all that have run them report less detonation issues and better running cars overall. Copper is the best metal to run, don't be fooled by high priced metal on your plugs, it only makes it harder for your coil to jump the gap and make a good spark. Take the AFR to 11.5 and you will be a little safer with no loss in power. I run 11.0-11.3 on my AFR on my street tune and have seen no power increase by going any leaner like 11.5 or higher. It only damages parts when you run that lean  Also on the compression test, do it with the TB open and it might even out all cylinders. John S |