nozzle placement

Why would you want to put them there instead of in the intake?
 
Dont hold me too this, I heard it second hand, maybe here.

Some tractor pullers run water in the exhaust manifold and between the stages to help keep the tubines below melting temp.

Your turbos will wear faster, that I do know.
 
I was going to this because i cracked an exhaust housing and someone said about spraying water to keep the turbo cool no real performance benefit at all in fact he said it hurt him a bit. I did wonder about the wear myself.
 
the couple time i actually looked at it while pulling 1400. I never thought with with the 100 horse injectors i would ever have a problem with heat since i got a silver bullet, but II said i did.
 
blackbetty62 said:
the couple time i actually looked at it while pulling 1400. I never thought with with the 100 horse injectors i would ever have a problem with heat since i got a silver bullet, but II said i did.
Click to expand...

Internally coat a new manifold with 2000 degree ceramic and use stainless fasteners with stainless lockwashers and walk away.

Otherwise, address EGT problems by not making them, not by spraying water at them.
 
blackbetty62 said:
the couple time i actually looked at it while pulling 1400. I never thought with with the 100 horse injectors i would ever have a problem with heat since i got a silver bullet, but II said i did.
Click to expand...

Honestly at only 1400, I wouldn't worry about it. Was the turbo new when you got it? Maybe it had a lot of passes on it at the strip or track? 1400 isn't much for pulling compared to 1800 or so that is typically seen.

If you are going to be doing it more consistently, then I'd say try more tuning or adding water to the intake.


Charles said:
Internally coat a new manifold with 2000 degree ceramic and use stainless fasteners with stainless lockwashers and walk away.
Click to expand...

How is coating the inside of an exhaust manifold going to keep the turbine housing from cracking?
 
i think he was saying coat the turbine housing. I bought it brand new from II i think it made it less than a year and maybe 10 pulls.

Otherwise, address EGT problems by not making them, not by spraying water at them.
 
i don't agree with that, the thing i knew going into pulling was i was going to have to find ways to deal with problems that came up. This is a problem and i am not just going to give up at the first bit of trouble
 
I misread above and thought it was the manifold that had cracked. Fwiw, the turbine housing on my second stage has about 10 cracks all along the inside edge nearest the turbine wheel right now. But they don't seem to be hurting anything just yet, so I left it be.

And yes, I suppose you could coat the housing as well. Should only be a few mils thick.
 
Somebody on here said that spraying water into the manifold insta-spooled the turbo due to steam expansion.

I don't have a thermodynamicallistic-enough mind to know if that would be smoke up the butt or not, though... I kind of doubt it since I've never seen it.
 
Begle1 said:
Somebody on here said that spraying water into the manifold insta-spooled the turbo due to steam expansion.

I don't have a thermodynamicallistic-enough mind to know if that would be smoke up the butt or not, though... I kind of doubt it since I've never seen it.
Click to expand...


How about instant spool kill....it takes a ton of heat to make steam cooling the exaust will not help spool thats for sure.
 
It's been done... some benefit in apps where enough waste heat is generated, but it can be hard on turbine wheels (though still not as bad as CO2 injection). Diesel turbines are typically much stronger than their SI counteparts.

A properly designed system can decrease turbo lag as well as manage excessive EGTs, but both are easier (cheaper) to accomplish by conventional means.

The increase in drive pressure caused by the water's volumetric phase change (~1700X) more than offsets the loss in thermal energy due to exhaust gas cooling.
However, the net drive HP increase in a dynamically-loaded diesel with a wide operating RPM doesn't lend itself to a cost-efficient system... so don't look for it anytime soon in a pickup truck.

We've bench-raced a design for this around here for a few years, complete with a pressurized downpipe feedstock heat exchanger - might be worth revisiting in light of replacing it with a 6.7L EGR cooler.
 
so what psi would you inject at? if your using the water/meth to spool the turbo, then it hasnt made much boost yet. correct? can you spray too soon or too late??

if you bumped up the mixture to a 60/40 or a 70/30 would you loose less thermodynamic energy <---???? (heat energy)? or would you loose dp by creating less steam?

will it damage the exhaust or turbo??
 
kuntryboy369 said:
so what psi would you inject at? if your using the water/meth to spool the turbo, then it hasnt made much boost yet. correct? can you spray too soon or too late??

if you bumped up the mixture to a 60/40 or a 70/30 would you loose less thermodynamic energy <---???? (heat energy)? or would you loose dp by creating less steam?

will it damage the exhaust or turbo??
Click to expand...



Why would I expect temperature and pressure to go down when the water came on? It doesn't sound like something that wants to accelerate a turbine wheel.
 
You must log in or register to reply here.
Back
Top