Murf915 Posted April 5, 2013 Share Posted April 5, 2013 Hey Guys, So anymore when i have been using my 97RD which is a single axle with a 300+ Horse Mack motor backed by a 5 speed, it is struggling pulling the loads im putting on her, mainly the crane counter weights which are pretty heavy, it pulls my dry van trailer with 40 thousand pounds of material fine all day long. I heard that you can turn this motor up for more power? Anybody ever do it to this motor if so think it is worth doing it? The truck is tagged at 68,000 pounds so she is legal to do so. Thanks Tom Quote Link to comment https://www.bigmacktrucks.com/topic/30692-my-97rd/ Share on other sites More sharing options...
felicello122 Posted April 7, 2013 Share Posted April 7, 2013 Hey Guys, So anymore when i have been using my 97RD which is a single axle with a 300+ Horse Mack motor backed by a 5 speed, it is struggling pulling the loads im putting on her, mainly the crane counter weights which are pretty heavy, it pulls my dry van trailer with 40 thousand pounds of material fine all day long. I heard that you can turn this motor up for more power? Anybody ever do it to this motor if so think it is worth doing it? The truck is tagged at 68,000 pounds so she is legal to do so. Thanks TomWhat style fuel pump you have, Robert bosh or American, the Robert is probably the one and easy to turn up. If you are stock now this will give you a lot more. Quote Link to comment https://www.bigmacktrucks.com/topic/30692-my-97rd/#findComment-176646 Share on other sites More sharing options...
Murf915 Posted April 17, 2013 Author Share Posted April 17, 2013 Everything on the motor is stock, it's the EM7 300 horse Quote Link to comment https://www.bigmacktrucks.com/topic/30692-my-97rd/#findComment-178529 Share on other sites More sharing options...
Jdiesel25 Posted April 18, 2013 Share Posted April 18, 2013 Turn the pump up, it makes a big difference Quote Link to comment https://www.bigmacktrucks.com/topic/30692-my-97rd/#findComment-178827 Share on other sites More sharing options...
Murf915 Posted April 18, 2013 Author Share Posted April 18, 2013 Turn the pump up, it makes a big differenceI heard that you lose your highway speed though and then you are screaming on the highway, is this true? Quote Link to comment https://www.bigmacktrucks.com/topic/30692-my-97rd/#findComment-178840 Share on other sites More sharing options...
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