In writing my research paper I have narrowed the area of study. Thanks to you guys for helping me with that.
I have settled on off-road diesels. I prefer land bases power units but marine engines can also be looked at. These can be generator engines, logging or construction equipment, anything that doesn't run the highway.
What I really need now is to find a mechanic that has been in this trade long enough to know the old style (pre Tier 1-4) engines as well as the new engines to give me some information that I can not find from the manufactures.
What I am needing is to compare an engine of a given size of 20 years ago to one the same size of today.
Any guys out there that can help me with this?
Thanks in advance for all your help.

 

murphy diesels have been in cranes along with 2 stroke 3-53 4-53 4-71 6-71 8v-71 8v-92 and 12v-71 runs in ships a dual 12v-71 and cats have been in cranes for along time and cummins super 250 270 300 350 400 and perkins diesels have been in forklifts and have been in off road equipment and some of the engines in Bucyrus-Erie's Cat Diesel Engines had a gas pony starting motor some of the pony motors you would start with a pull cord

 

Are you the one to talk to about these engines?

 

I may have looked right through what you said in the first post. Are you trying to find a particular engine manufacturer that has been in business a long time to see how their engines have revolutionized? The 2 stroke Detroit would probably be you best bet. It came out in 1938 and I believe is still in use. I'm no expert by any means but i'll help you out some.

Here's what I know...
Came out in 1938.

Used during WWII in everything imagiable. Tanks, generators, ships, general equipment.

It can run backward in some situations

The Army still uses it in some equipment.

Around the early 90's it became electronically controlled for emission purposes.

A bunch of bits ill remember as the day goes on.

Heres a link that gives some info on dd and other 2 strokes..
What is a two stroke diesel? - Dodge Diesel - Diesel Truck Resource Forums

Hope this helps.

 

In short I don't care which manufacture, I just want to compare an old engine (pre Tier 4 standards) of some size and manufacture to a new engine (with Tier 4 (or Tier3)technology) of the same size and manufacture.
I have tried to no avail to get information out of the manufactures but I guess they are scared to give out information they may feel is proprietary. I am not needing top secrete information, just comparison data between old and new.
I hope this makes sense.

 

Sure I'll help you. PM me with ur number. I talk better than I type

 

I tried to send you a PM but I don't have enough post yet to do so.

---AutoMerged DoublePost---

 

pm sent LOL u could have clicked my signature and got my number

 

Just curious, what differences are you looking for?

 

The basic efficiency stuff comparing old to new.

operating temps
fuel economy
weight
maintenance cost
engine life
rebuild cost and frequency

and basically anything else that has been affected by the new requirements.