convoyduel Posted February 21, 2012 Share Posted February 21, 2012 I was wondering what VMAC-based options are available for a 2000 E7 300hp to uprate the hp? I was just curious if there's any way to have a dealer change the program on the ECM to uprate the hp. It's in my '00 CH612 Postal Puppy with the Allison behind it. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted February 21, 2012 Share Posted February 21, 2012 We bought 3 or 4 CH612's about the same year as yours, all had the EM7 300 ETECH engine, Some of the customers/buyers wanted the HP bumped up. As it turned out these enines had the offset camshaft key ways "advanced" . To go any higher with the HP we would have to pull cam and either put a straight key way in for 350 or 400 HP or flip the key way around "retarded" and go for the 427 or 460 HP. Plus turbo and or injectors would have to be replaced depending on desired HP. Customer ended up keepin them the way they were. A Mack dealer can request a HP conversion to see what parts to change and download cost. Its free to ask. Quote Link to comment Share on other sites More sharing options...
convoyduel Posted February 21, 2012 Author Share Posted February 21, 2012 It's an excellent truck as-is, I was just wondering if there was a simple way to increase hp. It really does just fine as-is for local work and its fuel efficient as can be. I probably should leave well-enough alone. Quote Link to comment Share on other sites More sharing options...
mackncheese Posted February 23, 2012 Share Posted February 23, 2012 (edited) I just bought a 1999 RD690S with an EM7 300 ETECH. I gave the VIN number to the dealer and he sent it off to the factory and they told him that to get 400 hp I would have to change the injectors and the turbo and update the computer. To put in 6 Mack Reman Injectors, a mack reman turbo, reprogram the computer, and resticker the engine would be 3650. It is in the shop getting it done now. The service manager said that many have uprated the EM7 ETECH to 400 and it did not overstress the engine. I think mine is a VMAC lll. Edited February 23, 2012 by mackncheese Quote Link to comment Share on other sites More sharing options...
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