66rmack Posted September 15, 2016 Share Posted September 15, 2016 I'm told this is a good combo and it will pull better than the c12 430hp engines in our freightshakers. So I guess what I'm asking is, We shouldn't need to "turn it up" to compare the two right? The boss is worried that the 300 won't do the job as well. I said we can always give it a bump. After we see how it does. Quote Link to comment Share on other sites More sharing options...
TeamsterGrrrl Posted September 15, 2016 Share Posted September 15, 2016 It'll be fast enough, but not as fast as the C12s... But it will last a lot longer! 1 Quote Link to comment Share on other sites More sharing options...
Timmyb Posted September 16, 2016 Share Posted September 16, 2016 It's tough to compare the two. The c12 most likely has a 13 or 18 speed behind it which would help it. But if that 300 is running right, you will be staggered at how well it will pull. I have a 2v 300 and I'm blown away with how it performs. 1 Quote Link to comment Share on other sites More sharing options...
66rmack Posted September 16, 2016 Author Share Posted September 16, 2016 Thank you for the replies and info. The c12 has a10 speed sorry I forgot to say that. The Mack is a 300 4v Quote Link to comment Share on other sites More sharing options...
bts-4120 Posted September 16, 2016 Share Posted September 16, 2016 If you show up with a motor thats 2 Liters smaller with a 130hp and 150-200lbs less torque and it pulls as good as the c12 its done its job. I've seen some 300 pull very well and others not so much. It'll come down to rear gearing and the fuel screw as to how well it performs 1 Quote Link to comment Share on other sites More sharing options...
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