Does anyone have information on bigger nozzles and cups for the 7.3 injectors. Just did some in a 24v and was curious if anyone had done 7.3 injectors. I’ve also been looking for information on how these injection pumps are being modified. I’ve read about turning the fuel screw up. I’m more interested in how one can modify internals to produce more flow 190cc

 

The nozzles are plenty big stock, they'll supply up to 700-800hp with a big enough pump.

The pumps themselves are have the delivery valve modified, and then some converted to a db4

I'm basically in the same boat. I'd like more fuel, that won't cost me 1200-1800 for a pump

 

basically the Head and Rotor Group are changed... you can find the information on the Stanadyne dealer portal website.
you will need assistance of the equipment in a Pump shop to do proper calibrations so IMHO would be best to discuss it with them.

you would be better off buying a pump and injectors already setup for what you want.

 

Classic diesel designs in San Antone are getting 130cc's out of a stock plunger sized db2

I've don't some looking on the delivery valve and I think it wouldn't take much to open up the hole as it's recessed so wouldn't have to be perfect. I also spoke to a local shop and he told me I could go with a different leaf spring to get more travel out of the Pistons.

If I could build one and then just have it calibrated it sure would save alot of dough

 

Good information. I’ve got half a dozen injection pumps so I might start messing with them. The injectors I could probably run stock I’ve heard b codes are what I want.

This is what I’ve put together so far. I’m just waiting for the egt gauge and intercooler. Thought some injection pump mods might help a bit to

 

I think over on oilburners thewespaul (classic diesel designs, like DOC said above) has a tuning guide thread for these pumps.

Here it is: https://www.oilburners.net/threads/db2-tuning-guide.83813/

 

Interesting stuff. I know in the past when installing used pumps I bring that minimax rod in some until it brings the throttle response up and it definitely makes a difference.

Think I'll try shaving the nut a hair and bottoming it out and possibly getting an adapter to up the transfer pump pressure to 100psi at wot.

I'm gonna need more fuel for this and there isn't much out there high flow with low psi. I found some Chinese pumps that'll do it but push up to 14psi. With the amount of fuel volume returned I doubt we'll ever see that much psi however.

Anyone know the gph rating on a stock idi fuel pump? I saw some 110-120gph 460 mechanical pumps, wonder if they'd work by swapping the pump arms?

My next main project is intercooler and head studs but after that I'll definitely be hunting more fuel. I don't need a race truck but I'd like to get it up some more. Maybe 50-100 extra ponies and call it a day before I start pushing the limitations of a non turbo bottom end.

I've already got a low miles spare motor ready to swap in if **** ever hits the fan..right now my main limitation is boost. I can push way more with this vgt turbo than I can safely run.

 

I’m going to run my turbo with an intercooler but no head studs and see what happens. I’ve got a couple low km motors so I’m going to build one up proper and then swap it out. That turbo is set at 20psi. I’ve already got my truck set up with an electric lift pump to. I’ve got another pump with an adjustable pressure regulator I’m going to try out.

 

Take it from me, I never thought I would need studs, but once I got a turbo that all changed. I've hit 20psi several times like it wasn't anything and I know it's not going to last like this.

I also didn't do the head gaskets when I swapped motors and they went South about a year later and I didn't do studs then either.

 

Gosh I'm jealous of you guys all turboed and making power LOL. According to Napa's website it lists the mechanical lift pump at 30 gph and 5 psi.

 

hmmmm interesting......well it’s not in the budget haha. Head studs this winter. It’s not a daily driver so it only sees pleasure use.

 

Do you guys not just tighten the leaf spring down and back the fuel stop out to get more fuel? The DB2 should be able to produece more fuel than this engine can use -- black smoke galore
There are two stock piston sizes and an over size aftermarket that I am aware of(pulling tractors) - while not as much fuel as a Bosch "P" series the old stanadyne will hold up pretty well to a 400 cu in engine
The small injection line size is likely the most limiting factor on the trucks -- I suspect you would be surprised at the flow restrictions in the lines -- the pump may be blowing past the high pressure safety valve

 

I have a 7.3 turbo pump, (same as a 92+ 7.3n/a pump, and I've got it cranked as high as it'll go on the main screw, torque screw is backed out all the way. It'll lay a little bit of smoke but once it's turbo spools it's clear. I need studs and more fuel...

There are places that will build you a set of oversized lines, and it may be worth looking into but I know it's not gonna come cheap.

If I can't figure out a way to get more out of a single pump I'm gonna find some adapters and run two pumps. There's guys that have done it before and I've thought about it extensively. Other than making the engine bad a little more crammed I don't see why it can't be done... The initial cost would be similar but you'd save in the long run as two stock pumps could be had for $700-800 and wouldn't require any extra work really.

My main goal this whole time is affordable power gains anyone that had the time but not the money could achieve. I didn't use that many tools to do my custom turbo setup and I don't see why I can't build a pump and then just get it calibrated locally with guys I know/trust. I'm sure classic and r&d are alot ahead in the curve but I think the stuffs priced too high and there needs to be more competition or more ways to do this at least partially yourself.

I spoke with my local guys today and there supposed to be letting me know what they could do and what it would cost. At least that way I could get a warranty locally and wouldnt have to ship stuff off and wait on all of that headache if something went south.

 

I might take a gamble on the 460 pump then and try it. Thanks for the specs I couldn't find em.

I rolled N/A for along time and it still got the job done. When the time and moneys right you might turbo yours. Or not and that's okay too. I enjoy this platform either way. Most of all I miss the N/A sound.

Keep your eyes peeled at the junkyards. I've seen two turbod idis there before but only once did I have the money but ran out of time to get all of it. Ended up piecing it together with a used kit and had that but didn't like it much. I'm really happy with my custom setup. Although I could have used most of that and a borg warner turbo but then I wouldn't have an exhaust brake