Alright guys rebuilt a 6.9 motor to a 7.3. Wondering how much I need too turn the pump up to compensate for the change. 1984 6.9 f250 4x4 4speed.

 

I would say 1, 1.5 flats max, I would invest in a pyrometer ($100) and you can find the sweet spot you like

 

Alright so where is the easiest place to install andhow do I install? What's a good number to run at with it being non turbo?

 

Drivers manifold at the bend, drill and tap to 1/8 npt as that is what most senders are. 1200* is the safe limit. Also, i would say more like 1/2 a flat, if that. Difference between 6.9s and 7.3s is like 4cc of fuel, or practically nothing.

 

Assuming you are NA, The best thing to do is just floor it going up a hill and watch your exhaust.
Turn it up until you see a little black smoke, then turn it back down a flat.

This will end up keeping your EGTs in a pretty sane range, though having a pyrometer is always a good idea.

 

How is that better than using a pyro?

 

I meant best way to tune the fuel output. Not the best way to keep EGTs in check... though actually that's true too. It's better to have the fuel tuned correctly so that you don't *get* too high EGTs, vs having to watch the gauge and back off.

Having the gauge to know where you are at, as a safety measure is always a good idea. However, it's also a pain to install.

 

I installed mine in the passenger side manifold at the last port because I could get to it from the fenderwell with the tire on. Use anti seize on the probe too. They love to get stuck.

 

Having a truck that has always been EGT limited and drive by the pyro even at times when there's nothing more than a very light haze out the exhaust and I had an old worn out stock pump, so I disagree if your goal is to not melt pistons. As far as I'm concern a pyro is mandatory on these trucks and it's really pretty easy to install. The worst part is mounting it if you want something more practical than hidden under the dash.