Bigdogtrucker Posted May 11, 2012 Share Posted May 11, 2012 The engine in my C600 has E-350 above the timing cover.In the notes with the truck it says 1991 300,set to 250 specs.Also says casting numbers 239 GB5410A-P2.Stamped numbers 5423 P11-326-484 Quote Link to comment Share on other sites More sharing options...
Rob Posted May 11, 2012 Share Posted May 11, 2012 The engine in my C600 has E-350 above the timing cover.In the notes with the truck it says 1991 300,set to 250 specs.Also says casting numbers 239 GB5410A-P2.Stamped numbers 5423 P11-326-484Could be an original E6-350 block and set to what the notes state.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted May 11, 2012 Author Share Posted May 11, 2012 Any way to find out if it's a Maxidyne/Econodyne? Quote Link to comment Share on other sites More sharing options...
Rob Posted May 11, 2012 Share Posted May 11, 2012 Any way to find out if it's a Maxidyne/Econodyne? About the only way is to assume the stamped numbers in the injection pump tag are correct and call, a pump shop, or research them for application. This is not accurate if the pump has been recalibrated, or converted.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
theakerstwo Posted May 11, 2012 Share Posted May 11, 2012 Take the nunbers off of the side of the governor and call a pump shop that builds pumps and injectors.Or post them here and i have all of the 90s specs or most of the them. Quote glenn akers Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted May 11, 2012 Author Share Posted May 11, 2012 Here's a pic,and the numbers off the governor.6VB250/1050C-56238.The engine is dark grey,pump is green like the older engines. Quote Link to comment Share on other sites More sharing options...
Rob Posted May 11, 2012 Share Posted May 11, 2012 Here's a pic,and the numbers off the governor.6VB250/1050C-56238.The engine is dark grey,pump is green like the older engines.It is predominantly those numbers from the injection pump tag, and the governor tag you will need to work with. For the most part torque and horsepower curves are generated by these parts and their calibration(s).The absolute best thing to do is go to a truck shop and have them chain it down and dynomometer the truck for horsepower and torque curves. Install a pyrometer prior so you can watch one of the most important things, (exhaust temperature) so you don't melt things. With a competent shop doing the work this will be no worry as they will use external equipment fitted to your engine.I know you are dealing with a hodge podge of parts put together.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted May 11, 2012 Author Share Posted May 11, 2012 I'm thinking it's a 350 with a 250 pump,but i could be wrong.... Quote Link to comment Share on other sites More sharing options...
Rob Posted May 11, 2012 Share Posted May 11, 2012 I'm thinking it's a 350 with a 250 pump,but i could be wrong....It probably started as a 350 block. Engines can be built to whatever. The pump and governor settings are what controll this. There are variations to the base engines to allow them to withstand the higher stresses of higher calibration setting and therfore horsepower, but one can't be certain of what is what unless the truck is dyno'd.I would think a 350 block derated to 250 would last a good long time with decent routine maintenance.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted May 11, 2012 Author Share Posted May 11, 2012 The truck has a 10 speed direct duplex,i'd like to install a different trans. down the road.That's why i'd really like to know how it's tuned as far as Maxi/Econo. Quote Link to comment Share on other sites More sharing options...
Rob Posted May 11, 2012 Share Posted May 11, 2012 The truck has a 10 speed direct duplex,i'd like to install a different trans. down the road.That's why i'd really like to know how it's tuned as far as Maxi/Econo.Get some time in the saddle before you start thinking of changing. That duplex is a fine transmission and if a 72 series, "hell for stout" in the application it's in now.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Freightrain Posted May 11, 2012 Share Posted May 11, 2012 My .02Since there is no room for any coolers, likely they detuned it back to a 250hp motor? Since it likely would just burn up trying to make any more. Should last forever like that. The Duplex will too.How about this: take for a drive and see if it lugs down to 1100? Not abusively, but see if it will try to pull itself back up. I'd bet a Thermodyne will just fall on it's face. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
daveigou Posted May 11, 2012 Share Posted May 11, 2012 I think freightrain is right on the money. I think who ever did that knew what they were doing. Looks like a nice up-date to me.As far as the difference between maxidyne / econodyne, I just don't think its going to make much difference in a truck like that. Quote See my Flickr photostream page http://www.flickr.com/photos/96692978@N05/ Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted May 12, 2012 Author Share Posted May 12, 2012 Called a few places today,knobody knew exactly what the pump is off.One old timer Mack mechanic is pretty sure it's off a 673C 250.I drove it around a bit today and i'd agree.Does the turbo look like it's off the same? Quote Link to comment Share on other sites More sharing options...
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