Autolite
764s / Stock
103s / 1 heat range cooler
I am running the 764s in my car now and under boost I get a little detonation at about 16 degrees timing at peak torque ( ~4500RPM ). I have read where people lose power when going to colder plugs, but I assume this is on the same tune without changes. If I go to the 103s can I bump my timing and how many degrees is the rule of thumb for one step colder plugs?
I use an EEC-tuner and for my street tune I run 15 degrees from 3000 - 4400 and drop to 14 from 4400 to redline. This tune is very safe and never detonates, but I used to run 16 degrees without any problems so I figure my plugs are about ready for a change. Just considering going one step colder.
764s / Stock
103s / 1 heat range cooler
I am running the 764s in my car now and under boost I get a little detonation at about 16 degrees timing at peak torque ( ~4500RPM ). I have read where people lose power when going to colder plugs, but I assume this is on the same tune without changes. If I go to the 103s can I bump my timing and how many degrees is the rule of thumb for one step colder plugs?
I use an EEC-tuner and for my street tune I run 15 degrees from 3000 - 4400 and drop to 14 from 4400 to redline. This tune is very safe and never detonates, but I used to run 16 degrees without any problems so I figure my plugs are about ready for a change. Just considering going one step colder.
