What's most important is actual ground clearance. Not many cars use the frame for engine protection. If the oil pan is only 4 inches off the ground, then it could be a problem. A new Corvette oil pan is more like 5 inches off the ground.
I added these to the bottom of the frame rails after I scuffed my drain plug on one of the local mountains pretending to be a speed bump. When I initially installed the engine I had protection because the pan was above the frame rails but, I lowered the engine to get better side pipe fitting and created this problem. On a normal car this is not a issue because the engine is centered over the front wheels but our cars, with the mid mounted engine, have the front sump in a perfect spot to get hit as the front wheels come down off the bump.
I added these to the bottom of the frame rails after I scuffed my drain plug on one of the local mountains pretending to be a speed bump. When I initially installed the engine I had protection because the pan was above the frame rails but, I lowered the engine to get better side pipe fitting and created this problem. On a normal car this is not a issue because the engine is centered over the front wheels but our cars, with the mid mounted engine, have the front sump in a perfect spot to get hit as the front wheels come down off the bump.
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Originally Posted by Norm B
