I will agree with that. Sorry if Cumaparts were so good WHY DO THE MAJORS flatbed fleets like TMC and Melton NOT HAVE THEM then. Sorry I ran a early signature 600 Cumapart and I was BEGGING MY SHOP FOR MY LITTLE 500 60 SERIES BACK AFTER 2 WEEKS. Thing had no torque or pulling power even in the higher band. I drove a 550 Cat for about 10 months and NEVER saw the shop except for PM work same loaded weight that 550 would pull Sherman eastbound 10mph faster. That 500 Detroit was 12mph faster than that Sig 600 at the same weight and it was geared per Cummions for the runs.

Before anyone says I did not know how to drive a Cumapart I had a very HIGH HP Cummions at one company boss rebuit it for me special since he knew I would not abuse it I had 720 HP to the ground out of a 444 Big Cam 4 series thanks to Bruce and Pittsburgh Diesel Injections wonderful parts.

 

Was the signature cummins an ISX or not? I thought signatures came out before the ISX?

 

The Signature was the first ISX series.

 

Wow, we are impressed. I hope we can all sleep after all that excitement.

 

The ISX incorporated all the design innovations that were debued in the Signature series (DOHC head, Intebrake, etc.) Mechanically they are nearly identical. However the Signature series wasn't able to meet EPA 2002 emissions requirements and was dropped from the US/Canada market though it's available in other markets, such as Mexico and Australia which offers a 630hp version of the Signature.

EPA 2002 also nailed the coffin of the CAT C16.

For those flashy owner-operators, you can order the chrome valve cover installed on the ISX that was standard on the Signature. 8)