Water Injection Myths Debunked
#16
You quoted:
"For best results, I recommend injecting it right before the throttle body. This ensures that you get the full benefit of in-cylinder cooling."
Are you sure about that? I just checked the aquamist web site and it said:
"13. Where do I place the water jet?
Normally immediately after the intercooler unless the intercooler suffers from heat soaking such as the type that is fitted on top of the engine (Subaru, GTI-R, Toyota Celica and etc). "
I found this picture with the injector right into the Y pipe before the intercooler:
http://www.aquamist.co.uk/rescr/gallery/subaru/4.JPG
joe
"For best results, I recommend injecting it right before the throttle body. This ensures that you get the full benefit of in-cylinder cooling."
Are you sure about that? I just checked the aquamist web site and it said:
"13. Where do I place the water jet?
Normally immediately after the intercooler unless the intercooler suffers from heat soaking such as the type that is fitted on top of the engine (Subaru, GTI-R, Toyota Celica and etc). "
I found this picture with the injector right into the Y pipe before the intercooler:
http://www.aquamist.co.uk/rescr/gallery/subaru/4.JPG
joe
#17
Guest
Posts: n/a
Originally posted by capt'n'caveman
could you post some pic of your set up in your car? that would give us a good idea....plus we like pics.....if you can, get one of the location of the tank, the nozzle, and the pump
could you post some pic of your set up in your car? that would give us a good idea....plus we like pics.....if you can, get one of the location of the tank, the nozzle, and the pump
The booth from SEMA:
The tank, pump and accumulator:
The water line (red) and injector nozzle. [you can also see the high speed valve with the little blue arrow on it right below the oil cap in the pic]
-- DavidV
#18
Guest
Posts: n/a
Originally posted by Big Joe
You quoted:
"For best results, I recommend injecting it right before the throttle body. This ensures that you get the full benefit of in-cylinder cooling."
Are you sure about that? I just checked the aquamist web site and it said:
"13. Where do I place the water jet?
Normally immediately after the intercooler unless the intercooler suffers from heat soaking such as the type that is fitted on top of the engine (Subaru, GTI-R, Toyota Celica and etc). "
You quoted:
"For best results, I recommend injecting it right before the throttle body. This ensures that you get the full benefit of in-cylinder cooling."
Are you sure about that? I just checked the aquamist web site and it said:
"13. Where do I place the water jet?
Normally immediately after the intercooler unless the intercooler suffers from heat soaking such as the type that is fitted on top of the engine (Subaru, GTI-R, Toyota Celica and etc). "
That said, I still maintain that the in-cylinder cooling (most important feature of the Aquamist system, IMO) is better achieved through spraying after the intercooler about 6 inches from the throttle body or as close as practicable thereabouts.
I had long talks with Mike Kojima, writer for Sport Compact Car magazine and of the early pioneers of the Aquamist system for street performance here in the U.S.
On my MR2, he advised me to place the nozzle approx. 6 inches from the throttle body for optimal water droplet size. He used the same approach on the SCC project 300zx and SE-R with great results. His analysis from a recent installment on the 300zx project is as follows:
http://www.sportcompactcarweb.com/pr...scc_proj300zx/
"The Aquamist water injection system uses a unique proprietary atomizer nozzle to introduce the water to the intake air stream. The nozzle produces a range of droplet sizes from a fine fog to a coarse mist. This helps the water work more efficiently. The fine water fog vaporizes almost immediately, helping reduce the intake air temperature by about 20 to 30 degrees. The larger droplets do not vaporize until they reach the combustion chamber where they can perform their internal cooling and combustion buffering duties. All of the droplets are small enough where the even distribution of water throughout the manifold plenum is assured. Since most modern fuel injected cars have manifolds that are designed to flow dry air only, not a mixture of liquid and air, the maintenance of correct water droplet size is critical for even cylinder-to-cylinder water distribution."
-- DavidV
#20
I know Jackson Racing provides W/I solution for supercharged Miata's. How do these systems compare? or are they all using the same pump, nozzle, etc.?
http://www.jacksonracing.com/pages/h.../liqinjct.html
http://www.jacksonracing.com/pages/h.../liqinjct.html
#21
DavidV, thanks for the reply and pictures. I'm a believer of water injection!
It just seems so wierd to spray into the intercooler. I would think the water would puddle and have a difficult time getting to the throttle body.
joe
It just seems so wierd to spray into the intercooler. I would think the water would puddle and have a difficult time getting to the throttle body.
joe
#22
Originally posted by Big Joe
It just seems so wierd to spray into the intercooler. I would think the water would puddle and have a difficult time getting to the throttle body.
joe
It just seems so wierd to spray into the intercooler. I would think the water would puddle and have a difficult time getting to the throttle body.
joe
DavidV,
couple of questions.. the pump used in the pic looks very similar to JR kit. Have you seen the kit from JR? Are they the same?
Any side effect from using longer waterline from pump to nozzle (vs short)?
#23
Guest
Posts: n/a
Originally posted by John #555
DavidV,
couple of questions.. the pump used in the pic looks very similar to JR kit. Have you seen the kit from JR? Are they the same?
Any side effect from using longer waterline from pump to nozzle (vs short)?
DavidV,
couple of questions.. the pump used in the pic looks very similar to JR kit. Have you seen the kit from JR? Are they the same?
Any side effect from using longer waterline from pump to nozzle (vs short)?
(2) No, there is no side effect from doing so (within reason, of course).
-- DavidV
#27
Guest
Posts: n/a
What are we talking about, water injection or intercooler sparying. I think you should clear up water injection and intercooler spraying. JDM STI's have i/c sprayers not water injection. Water injection is when you spray water into the combustion chamber to lower egt's, not spray at i/c to get lower intake temps.
#28
Pr0n King
iTrader: (3)
Joined: Nov 2002
Posts: 26,618
From: The Land of Rocks
Car Info: Turncoat Turbo
Looks like water injection to me...
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
#29
Registered User
iTrader: (1)
Joined: Nov 2002
Posts: 2,504
From: Leg Humper
Car Info: '03 WRX wagon, faster than walkin'
Originally posted by ontada2
What are we talking about, water injection or intercooler sparying. I think you should clear up water injection and intercooler spraying. JDM STI's have i/c sprayers not water injection. Water injection is when you spray water into the combustion chamber to lower egt's, not spray at i/c to get lower intake temps.
What are we talking about, water injection or intercooler sparying. I think you should clear up water injection and intercooler spraying. JDM STI's have i/c sprayers not water injection. Water injection is when you spray water into the combustion chamber to lower egt's, not spray at i/c to get lower intake temps.
#30
Guest
Posts: n/a
DavidV, has anyone using your kit expirimented with a solution of water and hydrogen peroxide. I've talked to some GN guys, and a couple Merkur owners who were expirimenting with this but never figured an optimal ratio since too much would blow the motor (not to mention that hydrogen peroxide is highly corosive to engine parts). My father and I have been talking about this for years and now that I have a WRX it might be time to try it out.
-Jim
-Jim