and i found torque and hp max specs on the na engines.

max torque on all the 616 and 617 engines from 74 to 81 is 2,400 rpm.

max hp on the na 617 is always 4000 rpm.

max hp on the 616 is shown to be from 4000 to 4200 to 4400, depending on the year.

there could be some errors because i found that the 79 sd is listed as having 8.7 compression, 217 hp and 235 ft. lb or so of torque. this can't be right, can it?

so the max figures seem pretty close to the 617 turbo curves posted above.

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.