You will be able to run 1s just fine with a stock turbo and tuning. Originally it did not sound like you were going to tune right away, and you were curious if stock tuning and 1s would run hot, which they will if you do not take it easy on the skinny pedal.

IMO the stock turbo does not push near enough air to fully support the 1s or 1.5s. A lot of guys run 1s with a stock turbo and they are fine untill they tow or get away from sea level. If you are towing a grade, or even unloaded WOT up a sttep grade at high altitude they will run hot.

If you upgrade to a 366 you do not need to detune your injectors at all. Just pay attention to the pyro if you are going to run them on stock tuning and a stock turbo. Slowly build your system to what you want if you can't do it all at once. Like I mentiuoned thats what I did. I needed injectors, and no way was I going to spend 1200 on a stock set then in a year upgrade for another 1200. I learned the hard way with towing no matter how much I modded the stock turbo, added an IC it could not pull heavy at altitude safely. My tuning was off as well which likely added to the problem, but even in stock or modified stock tuning it ran hot, all other tunes were useless for towing due to temps. My situation was quite different than yours and not fairly comparable. I just wanted to forwarn what is around the corner if you try to hook up heavy and tow steep grades.

 

ok so for my situation i think i can manage with stage 1's - 1.5's with where i live and what i do daily with my truck. thanks for all the helpful info.

 

Nick, you've got me thinking now. I've always been told that stage 1 injectors (160 cc with stock nozzles, to be specific) would run like stock injectors unless you chipped it. 2 years ago when I had an injector fail, I went with Stage 1 injectors. My goodness does that truck run better now! I always just attributed it to my old injectors being worn out, but maybe there is something to what your saying. Now, I've always spent too much money on other things so I don't have any gauges to compare EGT's. But to me the only way this makes sense would be if the stock program calls for more fuel than the stock injectors can deliver. Who knows? I've only put 8,000 miles on that truck since I did the injectors.

 

Well i could believe it since its not a big jump, and guys running big sticks think it feels stockish. My comparison is I had a chip with stock injectors. I needed a new set, went to some 160s. The 160s is stock tuning ran like the stock injectors on DPs 100 hp tune.... seat of the pants butt dyno, no actual numbers, but it was very noticeable.

My injectors only had 114k on them but it was time due to a poor PO.

That all being said I don't know how that can be true technically 90 vs 160cc. Yes they are the same nozzle, but there is more volume. if you take 90cc on an injection time of 3ms on stock tuning, and the same tuning will call for 3ms with the larger 160cc setup, how could you not be getting more fuel?

I am by no mean a specialist on injector, I just put them in and leave it at that. Jim Rosewood can likely chime in an educate us all a bit!

 

what is the difference between 160 with stock nozzels and 160 with 30% nozzels?

 

The amount of fuel delivered is controlled by ICP, FIPW and nozzle size. If 2600 psi ICP and 3 ms FIPW equals 80cc on a 90cc stock injector, then it'll equal 80cc on a stage 1 injector. But if it equals 100cc, then a stock 90cc would bottom out and only deliver 90cc, but a stage 1 would deliver the full 100cc. Clear as mud? lol.


My point is that perhaps the stock program call for more fuel than 90cc.
Way back in the day I ran an edge evolution. These stage 1 injectors seem to make more power with no chip than the stock injectors did on the extreme setting with the Edge programmer.

 

The maximum total volume is the same, but the larger nozzles will deliver it faster.
EDIT: With no chip you will get more fuel out of a stock program and larger nozzles because the FIPW is the same, but the flow rate is higher. This will cause higher EGTs.

 

See above!!!!

 

LOL, Jim does need to straighten us out. Like I said I'm not a 100% certain either. I do know that the pcm does not think in terms % and it doesn't know what the capacity of the injectors are. It only knows ICP and FIPW. My numbers above were pulled from my butt just for argument sake.
The amount of fluid through a nozzle (any nozzle) in a given time period is determined by the pressure, the size and number of orifices, and the duration that the nozzle is open. The nozzle size is constant. The pcm sets the ICP and FIPW based on its program. So, in theory, they should inject the same amount of fuel unless the ICP and FIPW are high enough to completely empty a 90cc injector. Then a stage 1 injector could inject more fuel.
I'm essentially repeating myself, but trying to make it more clear.


I do agree that in my very limited experience that Stage 1 injectors on stock programming feels like more power. I just don't understand why unless my old ones with 280,000 miles and the ones in my 97 with only 130,000 miles were/are that wore out.

 

I'm about to drop stage 1s in my completely stock never seen a chip truck as soon as I get back to Texas... I'll have a thread going

 

let me know how that works out. ill be curious to see...