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#265: 01-27-2013, 10:31 AM
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Title: Flying W00t Monkey
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Originally Posted by acumenhokie View Post
NGK 2309 (LFR7AIX) Plugs and TurboSmart 34mm BPV
So the recommended plug is

Iridium IX LFR6AIX-11
Stock num 6619
Gap .032

So looking at some info tying to learn..... And so the 2309s are one grade colder.

5th gen stock turbo pushes >75hp down low but is pathetic above 4k. TMIC adds about 20HP. This does not seem to warrant colder plugs.

Say above 75-100 hp from stock is a general guide to go one step cooler. What are to guidelines to go to colder plugs as a precautionary measure to keep combustion chamber temps within range, as to not pull timing to prevent detination and engine failure?

Also are the colder gapped any different than .032?