Posted by James22 on March 16, 2013 at 11:32:20 from (207.179.221.14):
In Reply to: 3208 Cat engine posted by NEKS on March 14, 2013 at 05:27:14:
The 3208 is a parent bore engine which means that to rebuild you need to bore it out and install larger pistons or install dry sleeves and run standard pistons. Arrived after most of the development was completed but got in a few licks on this engine. Pretty good lower cost engine, that doesn't like to be lugged nor ran at constant high rpms (roughly above 3000 rpm). If willing to shift more often and keep rpms in roughly a range of 1900 to 2900 rpm) it will serve well. Constant high rpms cause severe rod bearing cavation. Initially this series engine had the fine scroll fuel system with oil lubricated fuel pump camshaft and governor. Cat went to the lower cost SMFS (sleeve metering fuel system) on the 3208. Pretty good system, better than the common rotary system, but similarly the fuel pump camshaft was lubricated with fuel, and fuel temperature could greatly effect governor settings. The three ring piston was an improvement. Story was that Ford whom bought most of the engines wouldn't pay for another compression ring nor desired the improved engine life. When it was all over they spent as much or more money developing/solving problems on the SMFS than if they had continued production with the more expensive scroll pump. Then decided to investigate an even cheaper fuel system to actually save money; called the neutator (not sure about the spelling, that had a projected cost comparable to the common cheap distributor/rotary arrangement (CAV,Roosa Master). It had many problems and was quickly dropped during a budget crunch.
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