Thread: Got it fast, woohoo it's great, but stinky cab!!
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Old Tue, January 12th, 2010, 08:10 PM
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Jackpine Jackpine is offline
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Originally Posted by bambo2888 View Post
...<snip>...Jack, I have an 04, K&N CAI, and the gryphon on level 2. my CHT didnt get above 192 all night. Does this mean im running rich? shouldnt i be a perfect candidate for extreme lean conditions?
You COULD be a candidate for "lean", but I'm not as sure as 88 is that CHT is really a good indicator. If your load is low (no hills, no high outside temps and no high RPMs, you're not going to see high CHT values. A value of 192 is about what your thermostat is supposed to open at (195 degrees), so it's probably just doing its job. And, Level 2 is a "richer" tune and in gassers, a rich mixture "cools" the engine.

My CHTs tend to stay under 200 (I think) when I'm not towing and just cruising on level ground. If I start climbing, though, they jump to the 210+ region pretty fast. I don't recall seeing anything above 220 though, even on hard tow pulls up mountain passes.

Really though - you WANT the CHT to be in the 195-210 region. This is where the engine operates efficiently and the emissions are lowest.

- Jack