I ended up putting some POD's in my truck today and am very impressed on how hard the truck pulls now. I was just wondering what kinda numbers everyone see's with POD's. I saw about 20 PSI before the POD's and see about 25 PSI with the POD's at WOT. I thought i might get a little more increase then 5 PSI from the POD's, but i guess i did have bigger injectors stock since it's a non-intercooled truck. I think i am only 1 turn on the full fuel (PO turned it), AFC at max, and starwheel is untouched. My timing is advanced also. Would a 16 housing give me quite a bit more boost? Have a 18.5 right now. I haven't been able to see if it smokes bad since i didn't get to test drive it until it was dark. We'll have to take a look tommrow


thanks

Jeff

 

when you drop housings i have heared you gain roughly 1-2 PSI. jiMMy

 

What Jimmy said. As long as you're happy with the spoolup and the EGT is under control, keep doin' what you're doin.

 

I have a 1992 D-250 that was totally stock with only 85,000 ORIGINAL miles on it when I got it....I played with the throttle linkage and serviced the truck, installed gauges and had 19 pounds of boost....put in a set of POD's....boost went to 24 psi on a hard pull......removed muffler......boost went to 26 psi.........just ready to make some pump adjustments.....boost ....????? Canucktrucks

 

I see 39 psi with my POD's. Fuel screw is only in about 1 turn.

 

Were is the fuel screw that everyone is talking about turning in?? And how much extra HP can one expect from the adjustment??

 

The non IC trucks had injectors that were equivalent to the Bosch 185's ...roughly. They were a little larger than the stock injectors that came in trucks from 91.5 to 93. So for a later model owner we could put in the 185's or the injectors now labelled 190's and see a nice boost in performance. Putting those injectors into an early truck was/is pointless.
The comparison values are roughly...early injectors ~26 HP over stock nozzles in later models. In the later trucks if we used the 185's we'd see about the same increase in our trucks..that being about 26 HP.
The POD injector will provide roughly 25-28 RWHP in an early truck (over there stock nozzle) and they would provide roughly 52-58 RWHP in the later trucks.
This is all dependant on how your pump is set up and what mods, if any, you've made.
If you make no changes other than installing the nozzles you'll see about 6-8psi more boost...remember boost is closely tied to fueling levels right...
For each size DOWN in turbo exhaust housing you go you'll pick up roughly 2-2.5psi higher boost.... again that will change depending on your pump situation as noted above.

Some guys really like the 12cm WG housings ....mostly because of the rocket spooling rate...really nice around town and good to pull out an pass on the highway but they really do begin to choke badly at the higher speeds/fueling/boost levels and get darn right nasty hot too....
The 16cm housing is certainly slower spooling up than a 12cm or 14cm (I ran one 14NG on my truck for a while and it was a choke point at the upper end too) but you can really do some tweaking and tuning to reduce that very small bit of lag the 16cm has. That is why the pump has the adjustments it does...that, plus the right sequence of adjustments/injectors etc and you can make up for the slightly larger housing size....now the one big advantage is the 16cm is able to move as much air as an 18.5cm can in the upper reaches of performance.
That is a big advantage for trucks that are a bit heavy on fueling via pump/injectors. It also means your EGT's will be lower too so you can "use" more of the power you have on the highway and still get good launch around town.

pb....