Ive got my 7.3 idi with a turbo and im having a hard time deciding if i should put a bigger pump and injectors and intercooler on my truck, or sell my truck and buy a PSD, or swap a different diesel into my truck. My trucks just a weekend toy, and im on the quest for more power, but roughly 1500 for all the mods above or 1500$ for another engine or truck. Just not sure which way to take my build. Its just for fun and not a daily driver, and i like to go fast. What would you do in my situation

 

and when you need injectors for your PSD....they are around 2200 for just injectors...at least around here in Cali they are.....PLUS you have all the wiring and computer,etc...

 

yeah the more i see nmb2 thread i keep wanting to keep the idi. What would you run, a rd90 pump or rd110. Either way will be intercooled and s362 turbo.

 

110. For a stock turbo, a 90 is fine, but the 110 is better!
Heck, I was pretty amazed at how well my S360 with a .63 exhaust housing did. It cleaned up my 110 pump easily, pushing 30+ psi of boost(no intercooler or anything).

 

oh, I might just spend the extra and get a 110 then, ill be using a intercooler, I already have studs. how much torque do you make? how is the driveabiltiy? my truck just feels like a dog compared to other traffic everyone wants to fly on the road and I cant really keep up, idi's are unique though.

 

Unfortunately, the best dyno numbers I have are around 250RWHP/ 465 torque, with stock turbos(got basically the same numbers from a Banks Sidewinder and stock ford-spec Garrett turbo).
This isn't bad when you consider that a NA IDI makes at /best/ 125 at the wheels, and I' saw a guy with a pump 'turned up' making 85(and a lot of smoke).
This can be achieved with a stock turbo truck(or banks turbo) and a 110CC pump.
That's it.

Drivability wise, the secret there is the Hypermax Smoke Puff Limiter. Don't be fooled; what it really is is a boost-referenced fuel limiter or aneroid. It reduces maximum fueling until the boost comes up.
The actual effect of this(when adjusted right) is that you can have your 250+RWHP rig, and very little to no smoke. And it makes it /much/ stronger and easier off the line - with a big pump like the 110, it's *really* easy to overfuel it when trying to take off quickly from idle. When that happens, you get a large cloud of black smoke, engine clatters badly, and you don't /go/ anywhere. Really scary when trying to take off into traffic.
Yes, if you are really good with the throttle, you can do it... but the smoke puff limiter makes it easy, and means you can just give it throttle without worrying about it too much.
Yes, you can floor it off idle and still end up with smoke, but it'll still take off and run good.
Also, I've been driving said 250-rwhp stock truck around for a few months now and still haven't blown a gasket with the stock head bolts... which is good to know.


I still don't have any numbers for the S360 setup, but it felt a /lot/ stronger. Just... felt like I wasn't pushing the turbo, unlike with the Banks Sidewinder I swapped it out for.
It is a /much/ bigger turbo, though, and there's a lot more mass. That's also why I wouldn't go for something much bigger unless you were planning on 200+ CCs of fuel - it just isn't going to want to spool quickly.

The S360, well, with a .83 exhaust housing, it was a dog. Produced less boost than the Banks with the exact same setup.
Swapped the .63 housing on it... boost city:

You Tube

Unfortunately, that motor had something wrong with it; a few days after I got it dialed in, I started it up in the morning and it ran really rough and then threw a rod. Ran great the night before.

 

so a t3 s360 or gt30 with a .63 housing is what you recommend? I saw your video, i like the modded intake hat.

 

S258 would be the ticket if not going bigger than 110cc. The turbo i spec'd is an S362/68/.91 sxe. 110cc for now, but would like to move up 150cc when i have a trans or clutch that will live.

 

I thought it was great. I don't have any experience with anything 'in between', but I'm fully confident that the 360 would handle a 150cc pump easily enough, with a lot of HP.

And the tight AR and big compressor wheel diameter means it should compress very efficiently, meaning less intercooling needed... not like the stock turbos which are basically thrashing the air at higher boost levels.

 

What are your power or performance goals and budget?