How much boost can you get from a stock turbo with some pump tweaks, POD injectors and the stock exhaust housing? I'm getting about 20 psi max now when I really lay into it, I haven't done much with the pump, the mechanic that rebuilt it and installed my PODs set it up and said to more or less leave it alone or come see him again if I want more power, but he's pricey and lives a long way away now. I've read that some of the guys on here are making 40+ psi of boost. Is the best route to change the exhaust housing on the turbo to a 14 or 16 cm one? So far the highest I've seen my EGTs is about 1150 preturbo, so I don't think I'm in any danger there, but with the PODs at idle it'll haze a bit, and when I really stomp it there is a lot of black smoke even as it runs up through the RPMs. So I'm trying to turn that fuel into power, I'm assuming I need more boost to do so. Also running stock intake with a BHAF on it. Thanks for any info you guys can give me. I'm having fun with this diesel stuff, sort of like having a carb all over again. Just with the added fun and tweaks of a turbo set up.

92W250's Sig:

'92 W250 ExCab LongBox/518/PODs/rebuilt and tuned VE/6" Skyjacker softride lift/pyro, boost, tranny temp/Magtec double deep tranny pan

On the way - tires and rims to go with lift, more tweaks to the pump, 366 spring, Goerend convertor, smaller exhaust housing on turbo, new exhaust

The H1C specs out at 18 psi max boost. If I get on it I'll get upto almost 30 psi, some guys are getting in the low to mid 30s. But I dont think That old turbo will live long boosting that high. I really try not to run it up too high untill my upgrade gets here. If your EGTs are only at 1150* @ WOT then you have room to turn up the full power screw. Especially since your signiture says you're getting bigger exhaust. Expect your EGTs to drop at least a hundred or two degrees after you get that done. Just becareful when you start dicking with the full power screw, because of runaway. Read up on pump tweeking threads. Have fun, dude.

muskrat's Sig:

93 Dodge W250 CTD
Auto Tranny
Tweeked IP
366 Spring
M&H M4 Fuel Pin
H1C/60mm Wheel/14cm Exhaust Housing
4" Exhaust Out 5" Stack

I am getting 45 psi out of my upgraded H1C in my 93.

Richie O's Sig:

89 Dodge W250, auto, 3.07 factory l/s, 4 inch stans exhaust, S300G 57/64/14, powerstroke intercooler 297 HP. 93 W250 extended cab, rag, 4.10 l/s , 6x16's, 60mm GDS H1C with 16 cm exhaust, work in progress.301 HP 92 W250 with a NV4500.

That's awesome Richie! I know i have the up grade in my signiture, but I havn't recieved it yet, GDS has the upgrade on back order. I ordered it at the begining of Oct. and can't wait to get it. How do you like it? I watched your video kickin ass at the drag strip. Your truck is pretty sweet.

If the video your talking about is the one with my blue 89 then that is a S300G turbo. My 93 is the one with the gds. I have no data of before the upgrade because I changed it while I was rebuilding the truck. I never drove it with the stock turbo on it. I assume it must help some but who knows. One thing for sure is that it is way to small for the 6x16 injectors. I have 3 full turns left in the pump and the temps are 1500 plus on a hard empty run.

So will cranking the full power screw create more boost to get the fuel burned or just dump more fuel? I'm seriously wanting the 16 or 14 cm housing to get rid of the lag from the 21 cm housing. What else does the upgrade entail? Thanks for the info guys, I've already read lots on pump tweaks and know how to do most of them, just haven't had the chance to tear into it much and find out where the pump is at right now, since it was tuned by the diesel mechanic that installed my PODs. But I'm definitely wanting to do the exhaust housing on the current turbo and then the exhaust all at once since the downpipe is cracked where it mates to the turbo and has a bit of a leak when you goose the throttle Thanks again guys. Richie, sounds like you've got yours tuned pretty well. How do those 6x16s compare with PODs? I know they advertised the PODs as somewhere around 60-70 hp without messing with the pump too much. Can't wait to really get the old girl rolling.

30psi max

hotcummins's Sig:

its a 12valve with a few performance adders

Oh yeah, I also tow with this truck, it's my tow rig for my 2.5 ton Jeep and whatever else we hook behind the old girl. So I'm wanting a safe level that I can still tow at least 9-12K lbs regularly.

They are a big injector, run pretty smokey, and run hot. THERE GREAT

just so you guys know before my intercooler i was boostinh 45psi with a 60mm compressor upgrade, with the intercooler i am making about 37psi

seandonato73's Sig:

1990 Dodge W250, custom intercooler, 4" turbo back exhaust,air dogII 165, 3200rpm gov spring, injection pump maxed out, 80hp DDP injectors, upgraded intake housing and compressor wheel,auto meter pyro,boost, fuel pres,and oilpres guages M&H fuel pin set M4 installed, advanced pump 3/16"
soon to come: s300, (when i get my taxes back) 6x0.016's and a cam(by the end of summer)and maby a little water meth by christmas

Thanks for the responses guys, still wanting to hear what I need to do to get more boost, I guess it's time to start playing with the pump tuning some soon. Thanks again.

Boost is related to fuel input. More fuel = more boost.

pods are the industrial injector and they really dont flow that much more.I think theyre only a 40hp injector.

The mechanic that installed the injectors bench tested them compared to my stockers and he said they have a spray pattern about 10 times bigger than the stock ones. They seem to throw out plenty of fuel so far, I guess I'll get to cranking the fuel screw and see what kind of boost I can make and still keep the EGTs reasonable for towing. About time to load the trailer up behind it and see what happens.

I get right at 20psi w/ a h1c turbo that is past needing to be rebuilt, and stock injectors, a stock fuel pump, and a stock injector pump that could be turned up more, but when the engine has been running a couple of hours @ mid rpm's and the fuel is hot, I'm ending up with a black haze @ full throttle. My 91.5 comes with a 21ccm turbo housing but if one puts the 14 or 16 on I hear the turbo will spool up faster (which I believe without seeing the results yet). Not sure how much full throttle boost you will get w/ "better" injectors though.

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Be careful about turning the injector pump up if you have a 5 speed manual. The automatics were the only tranny's holding stock 1st gens w/ the injector pump turned up.