Originally Posted by
gio94sr20ve No as in internally stock motors motors, since the compression is not that high you can use a hotter heat range spark plug, I tested on my car, many times and I got anywhere from 1-2 whp consistent against the #6 plugs. It's a cheap gain. when you dyno look at the afr.
Right on thanks for the info man
. What gap were you running if you don't mind me asking. I am going to try this on my stock internal n1 cams setup.