What are the differences between the 93 and the 94 7.3's, other than the turbo?

 

If your talking about the non turbo engine verses the turbo model then there are a coupple of changes.

Turbo engine Head gaskit has a heavier firing ring

Connecting rod and bigger wrist pins

Turbo engine has Anodized Piston heads

Turbo piston rings have a keystone design

Turbo engine has better exhaust valves

The oil cooler on the turbo has 30 fins per inche where the n/a has 24 fins per inch

Flywheel and dampaner were changed a little due to the internal ballance changes.

Turbo engine Fuel pump is calibrated for more fuel and used with code G fuel injectors.

And I think they re-routed the return lines from the injectors. it crosses over infront of the middle of the intake so to be out of the way from the turbo and its heat.

These are minor changes that were made. You can probably still use either oil cooler on either engine for instance.

Also just to let you know incase you don't, The turbo engine was produced from 93-94 1/2ish somewere and was an option. You could still get the non turbo as well in those years. I have seen a 94 N/A factory. Then after that It went to the gen 1 Power stroke somewhere in 94 1/2ish..

 

Both 93 and 94 had both NA 7.3 IDI engines, turbo 7.3 IDI engines, and 94 had the first Power Stroke 7.3 engine.

The NA engines for 93 and 94 were identical.
The turbo engines for 93 and 94 were identical.
The Power Stroke was not like either of the above engines.

 

The factory turbo blocks are casted heavier in the main journal webs also. I know for a few months you had an option for three engines. 7.3, 7.3 turbo, and a Power stroke.

 

Hmm, Ok, So over all the 7.3 idi turbo was just a little bit heavier duty? Can you really tell the difference in the two motors by the seat of your pants. I will be towing some 5k lbs and would like to get something that can do that fairly easily, but I am more concerned about reliability and longevity.

 

Yeh you will notice a power difference when a turbo is added to any of them. The thing is with a factory turbo {original OE parts} everything is matched up good to get the added performance with reliability and longevity.

Not saying you can't add things to a non-turbo motor and get those qualities but factory motors are a good place to start if you can find one. They aren't that common.

 

Where the factory turbo will really make a large difference over the factory N/A will be in high altitudes, expecially climbing hills.

 

A stock turbo engine will have about 30% more HP and torque than a NA engine.

An ATS or Banks aftermarket turbo engine will have about 45% more power and torque than a NA engine.

The addition of a turbo on an NA diesel makes it a different animal.
High altitude driving, a turbo will make a huge difference.

Here is an example using round arbitrary numbers.

Consider the air pressure at sea level is 14 PSI.
So you add a turbo and the boost is set to 14 PSI.
At sea level, the base 14 PSI plus the 14 PSI boost, means you have twice as much air in the cylinder.

Now let's assume you are at 14,000 altitude that air pressure is 9 PSI.
So the base 9 PSI plus 14 PSI boost and you have more than twice as much air in the cylinder than you would have in a NA motor.

Also notice that 9 PSI plus 14 PSI is 23 PSI, or still more air than you had in a NA engine at sea level.
Yes, the turbo engine will perform better at 14,000 feet than a NA motor will at sea level.