tuffenuf Posted October 27, 2011 Share Posted October 27, 2011 Just got 2 know, why this Mack does not have the power it should ? '05 Granite w/ Mack 10 speed, 44K on camelback @ 4:42 ratio and 24.5 rubber. No boost gauge on truck seems I drive around with fuel pedal mashed towards floor, and doesn't seem able to get up and go ? Hate the need to constantly stay near redline. Pyro never above 800, no boost leaks, clean filters, maybe grossed out @ 73K is too much for the pup. Thanks. Quote Link to comment Share on other sites More sharing options...
TOMD Posted October 27, 2011 Share Posted October 27, 2011 Mack has real problem with emmisions restrictions choked engine. I have a turbo and injector combo that wakes engine up. Quote Tom ~ Parts & Service SpecialistWatt's Mack Sales, Inc. 1-888-304-6225 Link to comment Share on other sites More sharing options...
tuffenuf Posted October 29, 2011 Author Share Posted October 29, 2011 I should call and ask about solutions, Thank You. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted October 30, 2011 Share Posted October 30, 2011 Just got 2 know, why this Mack does not have the power it should ? '05 Granite w/ Mack 10 speed, 44K on camelback @ 4:42 ratio and 24.5 rubber. No boost gauge on truck seems I drive around with fuel pedal mashed towards floor, and doesn't seem able to get up and go ? Hate the need to constantly stay near redline. Pyro never above 800, no boost leaks, clean filters, maybe grossed out @ 73K is too much for the pup. Thanks.4.64 gears or low profile 24.5 tires might help get the RPM/torque curve back on track but I have seen many CV's with this spec and be OK. I would take it to the dealer and have them install the latest Datafiles and software in both ECM's ( step 12B software) and calibrate the throttle pedal, this in some cases can make a big difference. These engine usually do a good job as they have the same torque output rateing as the AI427. EPA made Mack drop the AMI370 only after a couple of years due to being way to dirty. A manual boost pressure guage plumbed into the intake manifold is the best way to tell if the engine is getting full boost ( around 30 psi but I dont have my book close by) Quote Link to comment Share on other sites More sharing options...
tuffenuf Posted November 2, 2011 Author Share Posted November 2, 2011 Thanks for the info , I did talk to service manager and got to get there for appointment. Boost gauge will be installed to monitor things. Quote Link to comment Share on other sites More sharing options...
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