[cfg83]

Christ -

Originally Posted by Christ

Yes and no... you'd have to test very carefully as some engines really DON'T like lean burn conditions.

Also, the average temp, like I said, won't give you an idea of whether or not one cylinder is in danger, which is quite the possibility, due to manufacturing differences. You could technically be at a lean mixture that is best for one cylinder, and deadly for another one, and you wouldn't know that based on a single temp sensor/switch.

If you were testing very carefully, You could use a single switch/sensor to kick on an additional injector or something that would add water/meth to cool down the intake charge, but you'd have to be doing testing in small increments, as you wouldn't get real time data from each cylinder.

Using either way, you still won't be able to detect hot spots, which are a primary concern when considering a/f ratios. (and in general)

Thanks. That agrees with something I read recently on saturnfans. A fellow was driving 90 MPH with 93 octane, and he burned a hole in his piston :

Picture of Hole in Piston

This is a response he got from a wise old Saturn Fan :

SaturnFans Forums - View Single Post - What would cause a hole in the piston?

Originally Posted by OldNuc

The #4 cylinder runs hotter than the other 3 due to the EGR. The amount of carbon does not look like a preignition condition from carbon. You were using a high octane fuel so low octane did not cause it. Timing advance due to the higher octane and a defective knock sensor or as postulated a bad injector. A lean condition will usually take the center out of the piston and preignition chews on the edge.

This will help a bit Preignition photo

CarloSW2