Supertrucker117 Posted September 7, 2011 Share Posted September 7, 2011 I have a 2000 Vision with the 460 in it with 150k on the engine rebuild. I have never had a mack before but i have no power with a load. Bobtailing it runs like a raped ape. Weird thing is its a dog pulling 25k lbs or 50k lbs. there is no difference. Did have the air to air checked for leaks and the turbo is new. anyone have any ideas. Quote Link to comment Share on other sites More sharing options...
joes mack Posted September 7, 2011 Share Posted September 7, 2011 ive never drove a 460 that has power . dont know what it is with them but the 427s ive drove will eat them up ive even drove stock 400s that will out pull them loaded...joe Quote Link to comment Share on other sites More sharing options...
TOMD Posted September 8, 2011 Share Posted September 8, 2011 try reprogram. Quote Tom ~ Parts & Service SpecialistWatt's Mack Sales, Inc. 1-888-304-6225 Link to comment Share on other sites More sharing options...
cgallamore Posted September 8, 2011 Share Posted September 8, 2011 I have drove lots of 460, they don't pull like other Mack motors.They are more like 71 series detroits Slam your finger in the door, drive it like you want to blow it up.If it has a ten speed , your screwed.18 spd only, Gota keep the rpm's above 1650 Quote http://www.bigmacktrucks.com/uploads/1272400769/gallery_4852_794_314995.jpg Link to comment Share on other sites More sharing options...
cgallamore Posted September 8, 2011 Share Posted September 8, 2011 The 2000 460 has a power band between 1675 and 1725.There is an extra 30 hpThat's why I say 18spd onlyDon't know why Mack made an engine with such a narrow power band, and put tranies in that can't stay in the power band. Quote http://www.bigmacktrucks.com/uploads/1272400769/gallery_4852_794_314995.jpg Link to comment Share on other sites More sharing options...
TOMD Posted September 8, 2011 Share Posted September 8, 2011 can help with power diffrent turbo and injectors. Quote Tom ~ Parts & Service SpecialistWatt's Mack Sales, Inc. 1-888-304-6225 Link to comment Share on other sites More sharing options...
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