Mr Black Posted December 5, 2016 Share Posted December 5, 2016 Just bought another R Model with an EM6. Engine has been replaced at some stage and records suggest it has an EM6 285 block, but it doesn’t have any form of charge cooling and it still has the standard 237 pump. Engine runs really nice but if I am going to work the truck (which I hope to do) I will need to get a bit more power out of it. Don’t need anything too extreme in terms of HP. We have an ’82 Coolpower and an ‘85 2V 300 Maxidyne, and I would be happy if I could get the 237 to be comparable to either of these. Without pulling down the engine, any thoughts on the best way to get some extra power out of the 237? I guess the choices would be to convert to Coolpower specs (tip turbine etc) or add a front mounted intercooler. I assume I will need to upgrade the pump and turbo at the same time. Any other ideas or is one conversion easier than the other? Keen to hear from anyone who has done or experimented with this. Quote Link to comment https://www.bigmacktrucks.com/topic/47893-more-power-from-a-237/ Share on other sites More sharing options...
j hancock Posted December 5, 2016 Share Posted December 5, 2016 The gear housing in front of the injection pump will be stamped so you can identify for sure what you have. Will be better to make a plan if you know what the base is. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/47893-more-power-from-a-237/#findComment-354048 Share on other sites More sharing options...
BillyT Posted December 5, 2016 Share Posted December 5, 2016 Mr Black I ran a MH 300 maxidyne and it seemed to have more than 300 hp Mack really nailed it when they engineered the whole maxidyne,triple countershaft series! Quote Link to comment https://www.bigmacktrucks.com/topic/47893-more-power-from-a-237/#findComment-354072 Share on other sites More sharing options...
Mr Black Posted December 6, 2016 Author Share Posted December 6, 2016 14 hours ago, j hancock said: The gear housing in front of the injection pump will be stamped so you can identify for sure what you have. Will be better to make a plan if you know what the base is. Thanks for the tip, I'll check that out. The previous owner is a mechanic and he believes it is the standard 237 pump but I will check to be sure Quote Link to comment https://www.bigmacktrucks.com/topic/47893-more-power-from-a-237/#findComment-354128 Share on other sites More sharing options...
Mr Black Posted December 6, 2016 Author Share Posted December 6, 2016 8 hours ago, BillyT said: Mr Black I ran a MH 300 maxidyne and it seemed to have more than 300 hp Mack really nailed it when they engineered the whole maxidyne,triple countershaft series! Agree 100% Our 300 EM6 feels nothing like any other circa 300 hp engine I have come across. Must have bigger horses. I was only leaning toward the tip turbine set up as I know the block and internals I have are from a 285. Not sure if there is any significant difference between the 285 and 300 (besides air cooling and pump) Quote Link to comment https://www.bigmacktrucks.com/topic/47893-more-power-from-a-237/#findComment-354132 Share on other sites More sharing options...
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