Quote:
Originally Posted by JackandJanet
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
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Lean=to much air not enough fuel
Rich=to much fuel not enough air
Lean burning motors often have hotter exhaust gases and that's why holes get put in pistons, valves seals go, pipes blue, exhaust manifolds crack, and more.
Rich burning motors often have fouled plugs, plugged cats, soot deposites in exhaust, and more.
Been subzero to mid 20's up here and my cht's are still in the 200's on the stock tune!
Maybe one of these days I should get that vista thing and try to update to Bill's adjustments that he did for me?