11.2:1 on 92 pump gas...plugs?
10-27-2013, 08:06 AM
#1
11.2:1 on 92 pump gas...plugs? I am trying to decide between 3 different types
TR-55 (ran these for years with bolt ons, liked them)
TR 6
TR-55IX (iridium version of TR-55 with a 0.040 gap)
I will not be running nitrous EVER, and this is not a DD, but i do drive it on the street 90% of the time, other 10% is spent on the autocross course.
Setup is in sig but i run 11.2:1 compression with 92 octane on a 0.040 head gasket. I have TR-55 right now, but they have been in there for a few years, time for some new ones.
TR-55 (ran these for years with bolt ons, liked them)
TR 6
TR-55IX (iridium version of TR-55 with a 0.040 gap)
I will not be running nitrous EVER, and this is not a DD, but i do drive it on the street 90% of the time, other 10% is spent on the autocross course.
Setup is in sig but i run 11.2:1 compression with 92 octane on a 0.040 head gasket. I have TR-55 right now, but they have been in there for a few years, time for some new ones.
10-27-2013, 10:35 AM
#3
**Just what my tuner recommends**
For every full point of compression raised, or addition of 100HP, one step colder.
My car made 460/420 and I ran a TR6 gapped at .040. At the time I was 11.7:1
Like KCS said though, I previously ran 55's gapped at .055 with no problems either, same car, same mods.
For every full point of compression raised, or addition of 100HP, one step colder.
My car made 460/420 and I ran a TR6 gapped at .040. At the time I was 11.7:1
Like KCS said though, I previously ran 55's gapped at .055 with no problems either, same car, same mods.
10-28-2013, 03:52 AM
#6
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I'm still on TR55s but have lowered the gap. I hope everyone is aware the original gap spec was for emissions and has been revised and reduced in a GM TSB. .035 would be correct according to present literature IIRC.
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10-28-2013, 06:45 PM
#12
Ok so i am getting that the TR-6 is the way to go, and for gap, i am thinking .040 for a start point, inspect and move on from there. Is their any benifit to running .045 over .040 for a street motor that sees 6k+ maybe twice a year?
