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Injector Nozzles

Di drag trucks lower the pop pressure when applicable. also chevydiesel said he lowered his pop pressure and he is the only one i have seen that has dyno proof that he made more than 300 hp all fuel with no "drugs".
 
great white said:
AK makes a good point.

Pulse width on the ds4 is determined by the PCM and actuated through the fuel solenoid.

Timing may be slightly advanced, but I have no idea if the amount of advance due to lower pressures would be of any practical significance.

I change these things through a PCM reflash...
Click to expand...

Retarded i think....not you the timing :hihi:
 
In testing at this point- GM marine nozzels with 3200psi pop pressure.

So far- A much better sounding engine, lower boost pressure, and definitely more power. I used to cruise at 5 - 6 psi boost. Now, I'm cruising at 3 & 4 psi. I used to see 10 and up to 11 psi at wide open throttle. Now it barely makes 8.
Also VERY clean.

Did I mention how "mean" this engine sounds? !!! Has a distinct aggressive engine sound!
I put 100 miles a day on, so we will see how this works... unless the engine decides to take early retirement.
 
Glad hear its working for you. I tried as high as 5000 psi with marine nozzles on my 6.2 . It ran fine but wouldn't start hot. With the Tahoe I'm running a stock size two plunger pump,but with a few tweaks. I would like to show people how much power really is in a 2 x .310 plunger pump. And lower pop pressure might help,not sure.
 
Cumminsfever said:
In testing at this point- GM marine nozzels with 3200psi pop pressure.

So far- A much better sounding engine, lower boost pressure, and definitely more power. I used to cruise at 5 - 6 psi boost. Now, I'm cruising at 3 & 4 psi. I used to see 10 and up to 11 psi at wide open throttle. Now it barely makes 8.
Also VERY clean.

Did I mention how "mean" this engine sounds? !!! Has a distinct aggressive engine sound!
I put 100 miles a day on, so we will see how this works... unless the engine decides to take early retirement.
Click to expand...

I'm not knocking it but with the same fuel delivery and less boost, it sounds like maybe there is less exhaust drive pressure. IE:less power?

I'm just thinking this out.
 
NVW said:
I'm not knocking it but with the same fuel delivery and less boost, it sounds like maybe there is less exhaust drive pressure. IE:less power?

I'm just thinking this out.
Click to expand...

Butt dyno says more power. It had a real flat spot in it, and now it runs nice all the way up thru the rpm band. It used to fall off after 2000rpm, but now it keeps pulling up to 3500. My theory is- properly atomized fuel burns faster and more complete. The better the atomization, the more fuel is exposed for burning.

Will keep y'all informed on mileage. Time will tell!
 
Update- So far I am getting around 17mpg with ALOT of wide open throttle runs. Cruising is around 20mpg.
So far I am PLEASED with the way it runs. I definitely have more power.

Just so we are clear, this is the marine GM nozzel, set at 3200psi, DB2, and running strait WMO.
 
Cumminsfever said:
Update- So far I am getting around 17mpg with ALOT of wide open throttle runs. Cruising is around 20mpg.
So far I am PLEASED with the way it runs. I definitely have more power.

Just so we are clear, this is the marine GM nozzel, set at 3200psi, DB2, and running strait WMO.
Click to expand...

Waste Motor Oil???
 
great white said:
Just wondering if you've checked performance towing or not...
Click to expand...

It's a 1500, so no towing here. But I have done ALOT of wide open throttle runs, and I have a few "hills" where I try it out. DEFINITELY more power. I can finally keep up with traffic!!

Sorry guys. WMO= waste motor oil. Yes, it's 100%.
 
Just a quick question here, do you think you'd do any better with regular ole #2? And a hx35 or hx40 turbo? Or the electronic ip? Ok, guess that was a quick 3, but whos counting...
 
I used to run waste motor oil also. I didn't like the carbon it put on the injector tips,and also inside the precup. Looks like tan concrete,and just as hard. I also seized a few pumps from it,one was a .370 plunger,and will probably never find one again.
 
6.2 turbo said:
I used to run waste motor oil also. I didn't like the carbon it put on the injector tips,and also inside the precup. Looks like tan concrete,and just as hard. I also seized a few pumps from it,one was a .370 plunger,and will probably never find one again.
Click to expand...

Would it be acceptable to use crankcase oil as a lubricity additive to plain diesel? :skep:

MHO is to leave the recycling of waste oils into diesel to the pros and buy it from them. To many variables there for me. Parts, towing and time is expensive.
 
sshewins said:
Just a quick question here, do you think you'd do any better with regular ole #2? And a hx35 or hx40 turbo? Or the electronic ip? Ok, guess that was a quick 3, but whos counting...
Click to expand...

Yes. To all of the above!

#2 atomizes better. Bigger turbo has less restriction, and electronic pump has faster injection rate.
But when the fuel is free, who's counting?!!!
 
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