water injection to help spool?

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Old May 19, 2004 | 08:45 AM
  #1  
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Default water injection to help spool?

i heard something today from a mechanic.
he had a theroy that if you put a nozzle in the
exhaust manifold before the turbo the exhaust gasses
would turn the water into steam and help the turbo
spool faster. i was wondering how many of you guys have heard
of this or if anyone has tried it?
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Old May 19, 2004 | 08:54 AM
  #2  
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Default Re: water injection to help spool? (SKDRCR)

it sounds like your mechanic has been watching lots of rally racing and is mixing up thoughts of water injection with anti-lag...I am failing to see how steam would help spool the turbo faster..
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Old May 19, 2004 | 09:45 AM
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Default Re: water injection to help spool? (SleepyEG)

He was basically saying that the exhaust gasses turn the little amount
of water into a vast amount of gas (steam) giving the turbo
more more gasses to spool quicker.
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Old May 19, 2004 | 09:49 AM
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Default Re: water injection to help spool? (SKDRCR)

lol....

the water would be evaporated, lowering the temperature of the exhaust gas before the turbo..... thus slowing the spool time.

HEAT = ENERGY
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Old May 19, 2004 | 02:39 PM
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Default Re: water injection to help spool? (Boltz)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boltz &raquo;</TD></TR><TR><TD CLASS="quote">lol....

the water would be evaporated, lowering the temperature of the exhaust gas before the turbo..... thus slowing the spool time.

HEAT = ENERGY</TD></TR></TABLE>

Hmmm, thanks for the input
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Old May 19, 2004 | 03:05 PM
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Default Re: water injection to help spool? (SKDRCR)

People don't seem to understand that mechanics are not the ones behind the theory in our cars... there are engineers for that. Mechanics do mechanical work, so don't trust your mechanics theories when it comes to something like that.
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Old May 19, 2004 | 03:50 PM
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Default Re: water injection to help spool? (MadCow the Transvestike.)

yeah agree with everyone else, thats wrong and dumb. Because over time the water will hit the turbine and act like sand paper to it.
so if you do water injection do it after the turbo
H20injection.com
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Old May 19, 2004 | 04:26 PM
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Default Re: water injection to help spool? (scatuli)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scatuli &raquo;</TD></TR><TR><TD CLASS="quote">yeah agree with everyone else, thats wrong and dumb. Because over time the water will hit the turbine and act like sand paper to it.
so if you do water injection do it after the turbo
H20injection.com</TD></TR></TABLE>

The water won't hit the turbine, because it's not liquid water when it comes out the exhaust.
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Old May 19, 2004 | 04:27 PM
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Default Re: water injection to help spool? (SKDRCR)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SKDRCR &raquo;</TD></TR><TR><TD CLASS="quote">He was basically saying that the exhaust gasses turn the little amount
of water into a vast amount of gas (steam) giving the turbo
more more gasses to spool quicker.</TD></TR></TABLE>

That's a decent theory. However:

The water takes up space that could be used for the fuel and air mixture. Given a set volume, you're going to get way more cool stuff coming out the exhaust if that volume is filled with air and fuel, then if it's filled with water.

Combustion byproducts contain more energy than steam, and the steam requires absorbing energy to get that way.
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Old May 19, 2004 | 05:50 PM
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From: It says BIGBOOST
Default Re: water injection to help spool? (SKDRCR)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SKDRCR &raquo;</TD></TR><TR><TD CLASS="quote">i heard something today from a mechanic.
he had a theroy that if you put a nozzle in the
exhaust manifold before the turbo the exhaust gasses
would turn the water into steam and help the turbo
spool faster. i was wondering how many of you guys have heard
of this or if anyone has tried it?</TD></TR></TABLE>

This would be an interesting experiment if you could get the water out of the exhaust path and rely on the heat of the manifold it self to turn the water into steam. The downside to that is you stand a higher chance of cracking the manifold as a result of the contrasting temps and considering that water (and therefore vaporized water known as steam) can not be compressed, you'd either be facing one hell of a wad of back pressure, or one hell of a fast spooling turbo.

You could get the water out of the exhaust path by creating it's own bung to squirt the water directly against and use that as the source of heat to make steam, but eventually you'll cool it to the point where it will yield less steam. If one of those drops of water hit the turbine it won't act like sand paper. It'll act like a cinder block hitting a ceiling fan. Remember - water can not be compressed. ~112,000rpm + drop of uncompresable substance = not a pretty sight. Even if you put the bung upside down (so the water sprays upward) scavenging-type forces alone will suck a solid drop of water upward off of the manifold floor. Proceed with caution...
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Old May 19, 2004 | 07:01 PM
  #11  
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Default Re: water injection to help spool? (1316130057)

http://www.key-ideas.com/2ndWaterInjection.htm
thats where i was getting my info from
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Old May 20, 2004 | 07:28 AM
  #12  
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From: On the Prowl, Mo
Default Re: water injection to help spool? (1316130057)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1316130057 &raquo;</TD></TR><TR><TD CLASS="quote">

This would be an interesting experiment if you could get the water out of the exhaust path and rely on the heat of the manifold it self to turn the water into steam. The downside to that is you stand a higher chance of cracking the manifold as a result of the contrasting temps and considering that water (and therefore vaporized water known as steam) can not be compressed, you'd either be facing one hell of a wad of back pressure, or one hell of a fast spooling turbo.

You could get the water out of the exhaust path by creating it's own bung to squirt the water directly against and use that as the source of heat to make steam, but eventually you'll cool it to the point where it will yield less steam. If one of those drops of water hit the turbine it won't act like sand paper. It'll act like a cinder block hitting a ceiling fan. Remember - water can not be compressed. ~112,000rpm + drop of uncompresable substance = not a pretty sight. Even if you put the bung upside down (so the water sprays upward) scavenging-type forces alone will suck a solid drop of water upward off of the manifold floor. Proceed with caution...</TD></TR></TABLE>

excellent info bigboost, thanks for the replys guys
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Old May 20, 2004 | 08:31 AM
  #13  
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Default Re: water injection to help spool? (1316130057)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1316130057 &raquo;</TD></TR><TR><TD CLASS="quote">

This would be an interesting experiment if you could get the water out of the exhaust path and rely on the heat of the manifold it self to turn the water into steam. The downside to that is you stand a higher chance of cracking the manifold as a result of the contrasting temps and considering that water (and therefore vaporized water known as steam) can not be compressed, you'd either be facing one hell of a wad of back pressure, or one hell of a fast spooling turbo.

You could get the water out of the exhaust path by creating it's own bung to squirt the water directly against and use that as the source of heat to make steam, but eventually you'll cool it to the point where it will yield less steam. If one of those drops of water hit the turbine it won't act like sand paper. It'll act like a cinder block hitting a ceiling fan. Remember - water can not be compressed. ~112,000rpm + drop of uncompresable substance = not a pretty sight. Even if you put the bung upside down (so the water sprays upward) scavenging-type forces alone will suck a solid drop of water upward off of the manifold floor. Proceed with caution...</TD></TR></TABLE>

I feel so dumb when reading this..Good info...
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Old May 20, 2004 | 11:25 PM
  #14  
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From: It says BIGBOOST
Default Re: water injection to help spool? (SKDRCR)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SKDRCR &raquo;</TD></TR><TR><TD CLASS="quote">

excellent info bigboost, thanks for the replys guys </TD></TR></TABLE>

Glad I could help.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">I feel so dumb when reading this..Good info... </TD></TR></TABLE>

lol, don't feel dumb.

I was thinking about this a little bit and I think that if one wanted to try this, the best mounting location for the bung would be just off of the header flange, about an inch into the primaries. This way the bung stands the highest chance of being hot at all times and the curvature of the piping willnullify the threat of droplets making it to the turbine. If anyone goes through with this, the findings should be interesting.
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