Originally Posted by keith
i like to know what is the top rpm on a 5.9 12 valve 160 hp eng its in a 94 b/b,flat nose help......that 58 mph is for the birds ,lol would like 65 mph
It could spin to 3200-3400 as it sits, but you sure wouldnt want to hold it up there for too long. Fuel economy drastically drops, and so does the engine's over all life. My advice: re-gear the rear end, or get an overdrive trans.