We never used the "lap in" proceedure that Impco is suggesting. On the engines that we assembled and dyno'ed we would start engine and immediantly put under a light load to get temp up. Then after cam break in proceedure we would do several full load runs, shut engine off then deliver to...
Back in the 80s when I worked at a local machine shop we built quite a few small and big block chevrolet engines that were propane only motors. We would run 11 to 1 compression in the small blocks and try to end up with 10.3 or so in the big blocks..
We also drilled a very small notch in the top...
Once when hunting in Idaho a friend of mine talked me into a "shortcut" over the mountain on a dirt road. I was a little over 25,000lbs at the time with all the horses, gear, feed and extra water. I had the dually in low and trans temp went up over 350 degrees. There was nowhere to pull off...
I regularly run 17,000 to 25,000 lbs total weight with my 99 ford dually...I am on my 2nd automatic transmission. I now run an extra trans cooler with a electric fan in addition to the factory cooler. The trans fuid is NOT run through the radiator. I also use BG brand full sythetic trans fluid...
I think maybe personal opinions with a lack of actual experience with this type of airflow question is showing up here. I am not an expert on supercharging, but can address the problem of airflow to throttle blades. I have a 1972 GMC pickup with a turbocharged & intercooled 454c.i. engine it...
