Quote:
Originally Posted by Brian Carlton
It's not the peak figures that I'm referring to.
With a manual, your engine speed is directly tied to road speed. You can't get anymore torque from the engine if it puts out 70 lb.-ft. at 1200 rpm. You must wait until the revs climb.
With the automatic, the t/c allows the same engine to spin at 2000 rpm for the same road speed. This allows the engine significantly more torque to the wheels at that road speed...........and should result in a better E.T. to 60.
However, once the manual gets up in it's powerband, the automatic is at a disadvantage due to the losses in the t/c.
Of course the auto has the advantage of the faster shifts.
Many variables in a 0-60 time...........
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I think it might be possible to keep the turbo spooled on shifts if you are skilled enough with the diesel and the stick. My brother used to drive a diesel box truck for a living. Once I asked him to tow my diesel suburban to the repair shop when the automatic took a crap. We rope towed it. He was so good at shifting that truck without letting the rpm down that the rope never lost its tautness. It would sag a little but never go slack. I was truly impressed. I never suspected my little bro could shift so skillfully.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.
[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.