Pena dump truck service Posted May 10, 2021 Share Posted May 10, 2021 Hey guys. I just bought an 05 Mack Granite. I provided the Mack house my vin# and I was told my engine is rated and 370 horse power. I'm sure this has been asked before on here but I wondering if there are any upgrades to get more power out of this old dog without tearing the motor up. My truck has a 10 yard dump body on it and I want to pull a pup trailer. Any advice would be appreciated. If anyone has part #s I'll send you a gift card for some beer. Thanks in advance Quote Link to comment Share on other sites More sharing options...
OldRedMack Posted May 10, 2021 Share Posted May 10, 2021 Quote Link to comment Share on other sites More sharing options...
R.E.D Posted May 12, 2021 Share Posted May 12, 2021 https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/ 1 Quote Link to comment Share on other sites More sharing options...
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