I thought i read on here somewhere that with 6-8lbs of boost just going up to a Nissan injector would be adequate?
anybody heard that??
thanks
kj

New pics. Hobbs injector set up. Its too high pressure though. rated at 2-7.5psi (normally 6-7)

exhaust mount

alcohol injector hoses. one maual, and one on the hobbs pressure switch

I love this project.

I thought i read on here somewhere that with 6-8lbs of boost just going up to a Nissan injector would be adequate?
anybody heard that??
thanks
kj

I use the larger Nissan injectors on my set up. But I wouldn't run 8 lbs of boost in a stock motor. Too much compression with the stock pistons, I think you'll run into problems. After running my turbo setup for a couple years now, I really think you can get away using the STOCK injectors. The stock ECU and Injectors seem to be able to cope with moderate boost  ( 5/6 lbs) well.

So i am a LITTLE concerned about the longevity of my motor... Id like to stop it at 15 psi. I'll post a video of my boost gauge sometime, the way it builds boost is odd. from 5-10psi fairly slow, and shoots to 17+psi in seconds after reaching ten. Anyone got a creative boost regulator set up? im thinking of robbing an internal bypass off another charger, and relocating it to my exhaust manifold and using the intake-side solenoid to activate it.

Keep in mind this is Dumpster Garage, not Monster Garage. little money to spare 

The problem is you are running a turbo that was designed for a much bigger engine, and it looks like it comes from a
CAT Diesel, some of the new turbos come with a waste gate, I can't tell from the pics you have here. Even if it did have an internal waste gate it would be set for 17-25 PSI, which is fine for a Diesel, not for a gas engine.

Boost pressures over 5 PSI WILL destroy your engine with stock pistons, you need forged pistons to run boost
at the levels you are running now, even with then extra fuel, the stock pistons cannot take the heat and pressure
for long, they will fail by burning thru.

As far as the boost building quickly after 10 PSI, it's the volume of the exhaust that gets to the right volume
and really starts to drive the big turbine blade and boost jumps. This turbo in a big Diesel engine would sing
at idle and would be boosting 10 PSI at 1000 RPM and easily hit peak PSI before the engine was at 2000 RPM.

Most big Diesel's are governed to less than 2100 RPM, and the power band is a fairly narrow about 1300 to 1900
and on some occasions 1200 to 2000 RPM, CATs are known to torque well at 1200 and are governed to about
1900 RPM this does vary from engine to engine and some drivers bump the RPM and fuel settings, but in general
terms this is accurate.

You really need to go wrecking yard hopping and find a turbo from a 1.6 to 1.8 or even 2.0 engine, I like the
Subaru turbo from the mid 80's boosts about 7 PSI and those engines didn't get an intercooler, tho I would
recommend  one for engine life.

Wild

Yea the charger came from a piece of heavy equipment. 5.9L cummins, same dispacement as the dodge trucks. holset with a 130 exhaust housing. Yea its prolly gonna blow eventually, but they also can blow from no boost at all.

After doing some math, it makes sense that it works:

The volume of air comming from a 5.9L diesel and a 1.6L are comprable.

5.9L of displacement X 1350 rpm (average running rpm?? which should be 20 psi under a moderate load?)= 7965 Liters of air per minute.

1.6L of displacement X 5000 rpm ( almost reved out for a tracker) = 8000 liters of air per minute

Theres other variables, like volume of fuel burnt, EGT, ect. But even conservatively its designed to (and does) work well. Tracker puts out same volume of air at 3700 rpm as 5.9 |removethispart|@ 1000 rpm.

Its overkill and a time bomb yea, but i dont mind saying that i like that. 

And it doesnt have an internal waste gate, but i have other chargers that do. JUst thinking about using the wastegate component on my manifold. Might be to hard to set up the plumbing, who knows. but the activating solenoid is external and ajustable to the pressure i want with shimming the spring. maybe.

 "Dumpster Garage, not Monster Garage."  Man, that's gotta be the quote of the year!  Wish I'd said that!

You might be able to fix some sort of blow off valve in the intake
to limit the boost level, but the internally fitted waste gates are the
easiest kind to get and use, I don't use a BOV but with an auto trans
I never worried about lag between shifts

Wild

"Dumpster Garage, not Monster Garage."  Man, that's gotta be the quote of the year!  Wish I'd said that!

I wish i could claim it as original haha I saw it on a t-shirt. Dumpster Garage Off-road Club i think. I thought if my rig was gonna be in any club in the world, it would have to be that one haha