BronsonA2150 Posted 4 hours ago Share Posted 4 hours ago (edited) Were there any differences in internal components or turbo between the 2 horsepower options or was it just fuel settings? edit: also curious if 400 hp was the most it was offered in for that year/era Edited 3 hours ago by BronsonA2150 Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/ Share on other sites More sharing options...
Joey Mack Posted 3 hours ago Share Posted 3 hours ago I will try to post pictures. Do you have a full mechanical injection pump? Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567303 Share on other sites More sharing options...
BronsonA2150 Posted 3 hours ago Author Share Posted 3 hours ago 15 minutes ago, Joey Mack said: I will try to post pictures. Do you have a full mechanical injection pump? Mine has the electronic governor 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567305 Share on other sites More sharing options...
fjh Posted 2 hours ago Share Posted 2 hours ago 18 minutes ago, Joey Mack said: I will try to post pictures. Do you have a full mechanical injection pump? 3 minutes ago, BronsonA2150 said: Mine has the electronic governor I believe the cam key was offset on the 400 how ever I could be wrong Joey may know more! Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567307 Share on other sites More sharing options...
Joey Mack Posted 2 hours ago Share Posted 2 hours ago I dont recall that on the E-7. But my memory is fading. E-Tech,,, Yes.. Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567310 Share on other sites More sharing options...
fjh Posted 2 hours ago Share Posted 2 hours ago 6 minutes ago, Joey Mack said: I dont recall that on the E-7. But my memory is fading. E-Tech,,, Yes.. Yup me too! Sucks getting old! Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567314 Share on other sites More sharing options...
Joey Mack Posted 2 hours ago Share Posted 2 hours ago https://photos.app.goo.gl/XMT7WoQrM1khDUeo9 See if this link works.. look at timing degree difference and piston part numbers. This is from my Mack Tune up book for 1994.. Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567315 Share on other sites More sharing options...
Joey Mack Posted 2 hours ago Share Posted 2 hours ago https://photos.app.goo.gl/XMT7WoQrM1khDUeo9 try this link.. Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567317 Share on other sites More sharing options...
BronsonA2150 Posted 15 minutes ago Author Share Posted 15 minutes ago 2 hours ago, Joey Mack said: https://photos.app.goo.gl/XMT7WoQrM1khDUeo9 try this link.. Good info thanks. It does look like different pistons and nozzles at least? Quote Link to comment https://www.bigmacktrucks.com/topic/75049-350-vs-400-e7-differences-in-a-94/#findComment-567336 Share on other sites More sharing options...
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