Moparmike Posted December 4, 2017 Share Posted December 4, 2017 Ok guys I thought my truck was 350 but it's 300hp can a computer program change ..its a quad axle dump I just got day before thanksgiving..350 or 400 would be great..my other e7 is 400 8ll pulls like a train..this truck pulls ok but it's working a little hard at 71000lbs Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/ Share on other sites More sharing options...
Redbull876 Posted December 4, 2017 Share Posted December 4, 2017 Call you're local mack dealer I know they can increase it 50hp with computer program. Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386488 Share on other sites More sharing options...
Mackpro Posted December 4, 2017 Share Posted December 4, 2017 What's the model and last 6 of vin and I can tell you what can be done with just a down load from a dealer. Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386507 Share on other sites More sharing options...
fjh Posted December 4, 2017 Share Posted December 4, 2017 4 hours ago, Mackpro said: What's the model and last 6 of vin and I can tell you what can be done with just a down load from a dealer. What trany do you have ?You may want to stay where your at depending if you have maxidyne or not! if do not have a 13 sp or better moving to 350 / 400 may hinder your situation! Just A thought Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386532 Share on other sites More sharing options...
Mackpro Posted December 4, 2017 Share Posted December 4, 2017 1 hour ago, fjh said: What trany do you have ?You may want to stay where your at depending if you have maxidyne or not! if do not have a 13 sp or better moving to 350 / 400 may hinder your situation! Just A thought Very true fjh! If he has a EM-7 300 with 1425 torque( has cam gear straight key way) he might be better to stay where he's at. Plus it looks like to go to 400HP with 1460 torque he would have to change the turbo plus download. If he has the regular E-7 300 HP with 1160 torque ( has cam gear key way offset left) then to go any higher you gotta pull the cam and install straight cam key way, but the turbo and injectors would be the same to the 400 HP level. On either engine to get over 400HP you would need turbo and injectors and off set right cam gear keyway . And of course downloads for all. Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386543 Share on other sites More sharing options...
Moparmike Posted December 4, 2017 Author Share Posted December 4, 2017 It's a rd690 I believe last 6 are 031609.. Transmission is a Allison automatic Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386545 Share on other sites More sharing options...
Moparmike Posted December 4, 2017 Author Share Posted December 4, 2017 Thanks guys ..i may stay where I'm at if it's a lot of cash to change..20 tons it pulls pretty good just use to 400hp lol 8ll Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-386546 Share on other sites More sharing options...
Moparmike Posted December 13, 2017 Author Share Posted December 13, 2017 Ever check on how high o can go mackpro Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-387326 Share on other sites More sharing options...
Mackpro Posted December 13, 2017 Share Posted December 13, 2017 Forgot to look, but I just pulled it up and yes you have a EM7-300. Your Model number is a RD690S last of VIN 031609. So the cheapest you could do is a turbo change and download and get gain a little torque and a 100 HP. However, I would have your dealer contact Mack and see what Mack will do being its a Allison trans. When it comes to vendor trans they dont like to bump them sometimes. Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-387343 Share on other sites More sharing options...
Moparmike Posted December 14, 2017 Author Share Posted December 14, 2017 Thank you sir I'll do that Quote Link to comment https://www.bigmacktrucks.com/topic/51849-2000-mack-rd-e7-300-hp-how-to-increase-power/#findComment-387387 Share on other sites More sharing options...
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