cstaples Posted July 28, 2014 Share Posted July 28, 2014 So my EM6-300L is pretty tired and I have purchased a donor truck with 100K on it and an early E7 mechanical. The receiving truck is an 88 and the donor is a 92 both RDs. I am looking for information as to what hurdles I will run into during my swap. I am also going to change the HP on the E7 from 250 to ??? something a little hotter. Any advise there? I plan to have the pump recalibrated and Rochester injectors, I'm undecided about what turbo at this point. I love my Maxidynes but its time to upgrade ... Any advise or thoughts are appreciated. Thanks, Chris Quote Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/ Share on other sites More sharing options...
theakerstwo Posted July 28, 2014 Share Posted July 28, 2014 What trans do you have? I did the same thing but have some heat problems. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254270 Share on other sites More sharing options...
cstaples Posted July 28, 2014 Author Share Posted July 28, 2014 Currently a 2070, but have a 12 speed to go in at the same time. Probably going to go with 4.64 or slightly lower rears. The truck is never on the highway. Thanks, Chris Quote Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254281 Share on other sites More sharing options...
masterwelder Posted July 28, 2014 Share Posted July 28, 2014 I think the 4:64 with a 12 will work good off road and just be a little slow on anything faster than a 55. I would call Antrum(sp) Diesel in PA for upgrade questions. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254329 Share on other sites More sharing options...
GreenGiant2 Posted July 28, 2014 Share Posted July 28, 2014 Your going to have a different torque curve with the e7. 1 Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254330 Share on other sites More sharing options...
Td713001033 Posted July 29, 2014 Share Posted July 29, 2014 we changed two R models from e-6 350 to e-7 400 a decade ago. the biggest change I remember having to make was the front engine mount crossmember. old ones were the round half moon style. new style was a flat pad mount like the radiator uses . we had a truck with the new style to copy so it was not to bad. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254339 Share on other sites More sharing options...
GreenGiant2 Posted July 29, 2014 Share Posted July 29, 2014 The 300 L also has different r.p.m setting so you will gain more mph. 1 Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/36484-e6-to-e7-swap/#findComment-254343 Share on other sites More sharing options...
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