Clean the carbon out for free!!!
06-17-2016 | 10:38 PM
#1
Thread Starter
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,565
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Clean the carbon out for free!!!
Wanna clean carbon from inside your engine? Have doubts about it?
Do it for free!!
https://www.cherokeeforum.com/f30/st...-4-0-a-226299/
Do it for free!!
https://www.cherokeeforum.com/f30/st...-4-0-a-226299/
06-18-2016 | 12:19 PM
#4
CF Veteran
Joined: Jul 2013
Posts: 7,554
Likes: 15
From: Monett, MO.
Year: 1999
Model: Cherokee
Engine: 4.0
Very old trick to clean the carbon out first did it on a 1956 Chevy in 1964.
This is a great idea brought up again by one of our mods for a new generation to pass down.
GOOD JOB GUYS
This is a great idea brought up again by one of our mods for a new generation to pass down.
GOOD JOB GUYS
06-18-2016 | 01:27 PM
#6
CF Veteran
Joined: Jan 2012
Posts: 2,208
Likes: 4
From: Ocean County, NJ
Year: 1998
Model: Cherokee
Engine: 4.0L
We all know water can't be compressed. So when you pour small amounts into a running engine, the pistons attempt to compress and combust it. The water, being compressed as far as it can go, splits up and acts as a "scrubber" so to speak and bounces around, knocking the carbon off everything. This is also why you hear a decrease in RPM when pouring too fast or too much.
Hope that helps lol
Also, If you ever have seen an engine that runs water/meth injection, it's always super clean!
Hope that helps lol
Also, If you ever have seen an engine that runs water/meth injection, it's always super clean!
06-18-2016 | 02:16 PM
#7
Seasoned Member
Joined: Nov 2014
Posts: 338
Likes: 34
Year: 1998
Model: Cherokee
Engine: I6 4.0L
We all know water can't be compressed. So when you pour small amounts into a running engine, the pistons attempt to compress and combust it. The water, being compressed as far as it can go, splits up and acts as a "scrubber" so to speak and bounces around, knocking the carbon off everything. This is also why you hear a decrease in RPM when pouring too fast or too much.
It is true that water can't be compressed. When you pour small amounts of water into an engine, the heat of air/fuel combustion and the retained heat of the head and block vaporize the water - it turns to steam. Steam can be compressed, which is why your engine doesn't hydro lock when you pour small amounts of water in.
It takes a lot of heat energy to vaporize water. As you pour more water in, the vaporization process essentially cools everything off as it "robs" energy to phase change. That is why the engine bogs - it cools and less energy is being turned into mechanical work. You can actually get a power boost from small amounts of water because the expansion of steam is much greater than that of combustion gasses. But you have to meter it right and inject it at the right time. Too much water has the opposite effect...and even more water will flood and hydro lock your motor.
Steam cleaning works because water is a universal solvent. Add some heat, liquid water changes to vapor...and you have a decent cleaner.
Phase diagram for water:
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06-18-2016 | 05:44 PM
#9
Thread Starter
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
06-18-2016 | 05:59 PM
#11
Thread Starter
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,565
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
06-18-2016 | 06:12 PM
#12
CF Veteran
Joined: May 2012
Posts: 7,964
Likes: 957
From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
This is fundamentally incorrect.
It is true that water can't be compressed. When you pour small amounts of water into an engine, the heat of air/fuel combustion and the retained heat of the head and block vaporize the water - it turns to steam. Steam can be compressed, which is why your engine doesn't hydro lock when you pour small amounts of water in.
It takes a lot of heat energy to vaporize water. As you pour more water in, the vaporization process essentially cools everything off as it "robs" energy to phase change. That is why the engine bogs - it cools and less energy is being turned into mechanical work. You can actually get a power boost from small amounts of water because the expansion of steam is much greater than that of combustion gasses. But you have to meter it right and inject it at the right time. Too much water has the opposite effect...and even more water will flood and hydro lock your motor.
It is true that water can't be compressed. When you pour small amounts of water into an engine, the heat of air/fuel combustion and the retained heat of the head and block vaporize the water - it turns to steam. Steam can be compressed, which is why your engine doesn't hydro lock when you pour small amounts of water in.
It takes a lot of heat energy to vaporize water. As you pour more water in, the vaporization process essentially cools everything off as it "robs" energy to phase change. That is why the engine bogs - it cools and less energy is being turned into mechanical work. You can actually get a power boost from small amounts of water because the expansion of steam is much greater than that of combustion gasses. But you have to meter it right and inject it at the right time. Too much water has the opposite effect...and even more water will flood and hydro lock your motor.
Thank you very much for posting the CORRECT explanation.
The use of water injection to increase horsepower is at least as old as WWII, when my dad was working with the Canadian Army to develop usable combat systems for it, and as recent as now, as it's used in some commercial airliners as a poor-man's afterburner for takeoff. Well, maybe not now. My info on that is mid- 80s, so I don't know if it's in commercial use today.
