Quote:
Originally Posted by tmckenna
So Model Year 03 is the latest I would want? Is there a big difference between the 1995-2003 DT466e and the pre-1995 DT466?
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There is a HUGE difference in my opinion. Years below are -ish...
1993 and earlier: The DT series motors in buses (DT360 & DT466) were equipped with various models of mechanical fuel pumps. Ambac, A, MW, and a few others I believe. The later you get the better. The MW being the best, almost as good as the P-Pump which came out in...
1994-1995: The DT360 was dropped at this time, and the DT408 was added to the DT lineup. It uses the same block as the DT466, but has a different bottom end, and no wastegate on the turbo, and a few other differences. You could actually upgrade the bottom end to have a DT466 or even a I530 if you wanted. These models have the best mechanical fuel pump. The Bosch P-Pump. This is the same fuel pump that is on the Cummins 12-valve motors (6BT5.9, and 6CT8.3), and is the same fuel pump that all the 'Dodge Truck Bois' love. The fuel pump is easily tunable to produce more power, and increase the redline.
1996-1998: The DT408 was replaced with the T444E and was never seen again, and buses began being equipped with the HEUI injected (electronic/hydraulic) DT466E. You can still find buses from these years with the mechanical P-Pump, but you'll have to visually verify as both were released. It's not hard to tell the difference from a picture of the motor.
IMHO the P-Pumped DT motors are about as good as you can get. My own DT408 is a single wire motor. Except the starter cable, I need no electricity to keep it running. There are no sensors to go bad, no computers to mess with. It doesn't matter how many wires I cut, I'll never create a no-start condition (as long as I don't cut the starter wire). Any issues with it running can be narrowed down to a mechanical part that I can diagnose, and most issues can be solved on the side of the road with a basic tool set.
I didn't cover the post-emissions 2003+ DT466Es, because I never considered them so didn't research them.