Cooling mod

[SergntMac]

The way I learned it, 7 and 8 are indeed top pics for failure, and run the leanest first. They are the last to be fed in the fuel chain, and can be problematic when a custom tune is on the edge. Bringing down the coolant temp, even just a few degrees, helps control the problem, IMHO. Adds a little elbow room for that less than ideal octane.

[rayjay]

The way I learned it, 7 and 8 are indeed top pics for failure, and run the leanest first. They are the last to be fed in the fuel chain, and can be problematic when a custom tune is on the edge. Bringing down the coolant temp, even just a few degrees, helps control the problem, IMHO. Adds a little elbow room for that less than ideal octane.

If I'm following your posts correctly here Mac, using a 180 degree stat would be the 1st step to better cooling of the left head?