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Discussion Starter #1
Please list rpm range, altitude, modifications, etc.

I'm curious to see where I fall at with my tuning abilities and if I should continue tuning or not.

So far, I've stage 2 injectors, bigger fuel pump, adjusted valve lash, tuned afc.
4x4 dually 12v
4" turbo back
She hazes a little no matter
I don't like blowing smoke at all.
I am working on upgrading to an he351 to keep up with my fuel system and so I hopefully blow less smoke.
Thanks.
 

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I first have to ask... What are stage 2 injectors?

Please list hole count, size of holes, and spray angle.
If you dont know any of those parameters then that is the first place to look at for the source of your haze.

Sent from my LG-H932 using Tapatalk
 

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Discussion Starter #3
I first have to ask... What are stage 2 injectors?

Please list hole count, size of holes, and spray angle.
If you dont know any of those parameters then that is the first place to look at for the source of your haze.

Sent from my LG-H932 using Tapatalk
I dont know honestly. The previous owner told me they're aftermarket, bigger injectors. I haven't tore into it yet to determine what brand, hole count, etc. Same goes with the fuel pump.
I do know that it dumps if I turn up preboost
and turn starwheel out.
I also trust the previous owner as far as what parts are in there.

All I want to know is at what rpm range other hx35 owners are building 5lbs.
 

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Building 5 psi of boost depends on how fast your going, on a level road, pulling or hauling a load. Driving on level road at 60 with light wind and about 1,700 rpm's I run between 4-5 psi of boost. Not sure of my altitude but i'm pretty much stock except for 4" exhaust and open center muffler, no 8 fuel plate and whatever 40 hp injectors are and auto trans.

The fuel pump has no say in how much your truck smokes, it will only put out the PSI that your OFV will let it.
 

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I want to know what a bigger fuel pump is. If the engine hazes the afc is not tuned.
 

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hemirunner426, does your rig have an hx35 in it? What rpm range are you building 5lbs of boost?
I ran an HX35 for a time before switching to a SXE362 at this power level. Overall it was very responsive as you would expect from a small turbo on this engine. There are a ton of factors at play to answer your question with any sort of accuracy... but I can say that on a level surface, empty truck, typical traffic acceleration it would build 5lbs of boost anywhere between 1300-1500rpm.
 

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Discussion Starter #8
hemirunner426, does your rig have an hx35 in it? What rpm range are you building 5lbs of boost?
I ran an HX35 for a time before switching to a SXE362 at this power level. Overall it was very responsive as you would expect from a small turbo on this engine. There are a ton of factors at play to answer your question with any sort of accuracy... but I can say that on a level surface, empty truck, typical traffic acceleration it would build 5lbs of boost anywhere between 1300-1500rpm.
Very helpful thank you
In the same scenario I'd say I'm making 5lbs at around 1800 at a mile above sea level at full throttle 3rd gear.
The previous owner told me he had the largest injectors an hx35 could handle before having to upgrade to a larger turbo. What size injectors that is is beyond me. He said something about stage 2 so thought it was worth mentioning. Whether that's 75hp, 150hp or 40hp, I don't know.
I now know that I can continue playing with my afc with hope for better numbers.
 

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Whether that's 75hp, 150hp or 40hp, I don't know.
Those numbers are meaningless as well. Hole count, size of holes, and spray angle are the numbers you need to know. If you are accelerating in 3rd, WOT and only producing 5 psi of boost you have a problem, no matter if you are in Denver or Houston.
 

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Very helpful thank you
In the same scenario I'd say I'm making 5lbs at around 1800 at a mile above sea level at full throttle 3rd gear.
The previous owner told me he had the largest injectors an hx35 could handle before having to upgrade to a larger turbo. What size injectors that is is beyond me. He said something about stage 2 so thought it was worth mentioning. Whether that's 75hp, 150hp or 40hp, I don't know.
I now know that I can continue playing with my afc with hope for better numbers.
You should find out the hole count, size, and spray angle. It is super important for a good running engine.

DDP usually does the stage nomenclature on their injector. They never indicate size, hole count, or spray angle. As far as I know they are the only one's who don't. Most people choose to stay away from them for this reason.

Anyways, only 5lbs at 1800RPM at full throttle? You have another issue going on there entirely. Most likely the AFC configuration is not correct.
 

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Full throttle in 3rd I'm at 21psi of boost flat ground empty
 

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Sac nozzles are usually hazy at idle. Pull one of them out and find someone that can give you an idea what your running.
 

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Sac nozzles are usually hazy at idle. Pull one of them out and find someone that can give you an idea what your running.
So do 155* spray angles.

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Discussion Starter #14
Turns out I had 4x.011 injectors with the wrong spray pattern. Swapped in 5x.012 SAC Diesel Auto Power injectors and she's running alot better. Still not building boost properly. I'll be looking into boost leaks when the weather clears up and am looking for a larger turbo in the meantime. I know for a fact my turbo needs replaced asap.
Thank you all for your input.
Anyone have any suggestions on what would be a good match for the injectors I installed? I'm strongly considering an HE351CW. But if there's something that bolts right in I'm all ears.
 

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I'm going the he351cw route soon as well, I snagged mine for $150. Just need to pick up a few odds and ends now.

There are quite a few options for actual drop in replacement turbos now days though. I'm on the fence now whether I should sell my 351 now that its all rebuilt and grab a drop in aftermarket turbo or just run it.
 

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Mine hits 5 psi like one second after pressing the accelerator and quickly hits 18 or so on normal acceleration. Might hit 30-35 with pedal to the floor if I'm pulling or going uphill. I'm passing 1300 rpm or so when the boost gauge zips past the 5psi mark. I get a puff of haze unless I'm just putting around gently. I'm not one to putt around though. I need to put a larger exhaust on, that will help I think. I've been considering the K27 turbo but my Holset is still in very good condition and I'm trying to restrain myself lol. I think I'm on the ragged edge of what the HX35 can handle right now though.
 
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