[solidirish]

Looking for ideas. No collant loss before I had my engine rebuilt last year..insert bearings, counter balanced crankshaft, larger intake valves, 330 camshaft, lightened flywheel, 6.0 high compression head..using Autolight 3076 plugs set at .028. Have about 1,500 miles on new engine. Had about 3 quarts of antifreeze loss on my 800 mile trip to the St Louis Meet, driving a lot at 55mph, so I thought I would test what is happening.
Two days ago I filled antifreeze to 1 1/4 in below end of overflow tube. At this level there was no loss for 2 days sitting in the garage. I drove 27 miles yesterday.....outside temp 75deg, antifreeze temp max 185 deg, speed 35 to 45 mph when I got home I immediately checked antifreeze when still hot....nothing visable. Filled again to 1 1/4 in below top of overfill tube and put in 2 qrts of antifreeze. Any ideas? Thanks in advance.

Ray in Illinois