To others dropping in here- turbo pumps and N/A pumps are NOT the same. If you are considering replacing your IP, please contact a diesel shop and get the CORRECT replacement if you are keeping your truck stock.
I didn't ask how many pumps you've built, anybody with a stand and a calibration sheet can rebuild a pump. Hell, there are plenty of guys doing it without. I asked how many pumps you have built on the level of my turbo-cal's and DB4's. There is a big difference between coming up with your own calibrations that work, and using the cheat sheet.
Evel, it looks like I jumped the gun initially on the 69cc rating of turbo-calibrations spec, I read/type scatter brained a lot. The valve cover itself does state 68-69cc, and I can admit that I don't know all of the factory calibrations by heart, because I generally don't do a stock pump unless its N/A.
My Turbo-cal pumps are superior in every way..... but this is the type of misinformation that causes people to go on the forums looking for "turbo pumps" thinking they are a special, higher output pump. I deal with 2 different Injection shops that both disagree with you, and I disagree with you.
There are two head and rotor groups. 6.9 and 7.3. One is a .29 plunger, the other a .31
All 6.9's are .29, all 7.3's are .31
There are a bunch of slight differences in cam ring numbers and such but nothing of real importance. The main importance is that you get the right Head/Rotor, and the right housing.
You have housings that had bronze bushings/less seals, and Roller bearing/more seals shaft.
The last four digits of the Stanadyne part number for the bearing pump have to be 4746 or larger. 4369 and 4541 are built both ways so hard to tell unless torn apart.
The "turbo pump", which is the same pump used on 92.5-94 trucks regardless of turbo or N/A. Mechanically they are IDENTICAL. The only difference is a slightly different factory calibration.Nothing you would ever tell the difference on, on a stock truck, which is why there was only a 5-10hp increase in power.
It uses the aneroid screw (commonly referred to as torque screw), and they have a slightly different advance piston, allowing a broader light load/speed advance than the other 7.3 pumps.
In the end it doesn't matter. If you are having a pump done by anyone that can look outside of a calibration sheet, they can make any .31 pump perform the same. There is no difference in max fuel rate capabilities between N/A and "turbo" 7.3 pumps. Period.
When I do my Turbo-cal 80-90cc performance DB2, the only core requirements is that the core housing is a bearing housing, the shaft is not broken, and it has a .31 head/rotor. When I get a torque screw housing, I plug the torque screw hole.