ANOTHER Nitrous/spark plug question. Sorry guys
As far as pulling timing, the timing tricker will pull timing but I would verify that it works before you actually spray it. If you can get a hold of a scan tool, your pcm will show how much the timing is advancing. Hook up the timing tricker and verify with the scan tool that you are getting less advance than before.
And general rule for timing is 2 degrees per 50hp.
Of course with a good tune, you may not have to remove that much.
Read your plugs for timing and fuel marks and verify A/F ratio.

