Need insight on Water injection
04-13-2006, 07:16 PM
#1
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Need insight on Water injection
I plan to run JRSC @10-11 psi . Cannot afford LHT intercooler, so I'm gonna go with water injection to keep down detonation and run more timing. I need help cause I'm noob at this. Read some threads but no good summary:
1. Will it actually lower intake temp? how much?
2. Should I run pre-charger or post-charger?
3. ANy recommended brand/kit?
4. If I plan to shoot for 250-260whp what nozzle should I use?
THANKS!!!
1. Will it actually lower intake temp? how much?
2. Should I run pre-charger or post-charger?
3. ANy recommended brand/kit?
4. If I plan to shoot for 250-260whp what nozzle should I use?
THANKS!!!
04-13-2006, 07:40 PM
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Re: Need insight on Water injection (elpiar)
1.Not sure about intake temp differences.
2.Friend of mine has it installed after throttle body.
3.Snow injection kit http://www.snowperformance.net
4.Friend using the larger pill and is running 350hp with a vortech s/c
2.Friend of mine has it installed after throttle body.
3.Snow injection kit http://www.snowperformance.net
4.Friend using the larger pill and is running 350hp with a vortech s/c
04-13-2006, 08:14 PM
#4
Honda-Tech Member
how much time and energy do you want to put into it? are you capable of fabricating things? are you capable of designing/building simple electronic circuits? Are you capable of retuning the motor appropriately?
By far the most impressive water injection setup I've seen was done on a 302 mustang build. A second fuel rail with 8 - crown vic injectors (18lb?) was added to complement the 8 - 28lb main injectors. A water resevoir, water pump, water pressure regulator and water "fuel" rail was added. A simple board with a PIC or AVR or something was used (in addition to the difference in injector size) to control the ratio of water injected vs fuel injected by scaling the injector pulse driving the fuel injectors to drive the water injectors. They saw a ~35-40% decrease in BSFC, approximately 3 degrees more timing required to achieve same power levels and WOT was able to be leaned from 12.8:1 to 14.7:1 with no detonation or long term stress on the motor.
By far the most impressive water injection setup I've seen was done on a 302 mustang build. A second fuel rail with 8 - crown vic injectors (18lb?) was added to complement the 8 - 28lb main injectors. A water resevoir, water pump, water pressure regulator and water "fuel" rail was added. A simple board with a PIC or AVR or something was used (in addition to the difference in injector size) to control the ratio of water injected vs fuel injected by scaling the injector pulse driving the fuel injectors to drive the water injectors. They saw a ~35-40% decrease in BSFC, approximately 3 degrees more timing required to achieve same power levels and WOT was able to be leaned from 12.8:1 to 14.7:1 with no detonation or long term stress on the motor.
04-13-2006, 09:43 PM
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I was about to build a similar thing, using the supplemental injector controller from 034efi. (I already had one, laptop programmable, map vs rpm, about $300) I've never read about anyone else using fuel injectors to inject water..I guess great minds think alike..lol
I gave up on it though because I couldn't make it 100% failsafe..ie, boost cut with any type of failure. I still might pursue this idea again in the future though.
I still have some questions about the long term feasibility of using a pump/regulator/injectors designed for gasoline with water, even if it is distilled..
I gave up on it though because I couldn't make it 100% failsafe..ie, boost cut with any type of failure. I still might pursue this idea again in the future though.
I still have some questions about the long term feasibility of using a pump/regulator/injectors designed for gasoline with water, even if it is distilled..
04-13-2006, 09:50 PM
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There are other systems out there that use a controller that is tunable map vs rpm, with a high pressure pump that is cycled (no regulator or solenoid style injectors, only nozzles) Aquamist..? programmable, individual port style nozzles with hard lines..legit, but like $1k..?
04-14-2006, 04:19 AM
#7
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Re: (rorik)
I wasn't thinking something as complicated as you described. Since I'm shooting for only like 250whp anyway. My budget is around 300 dollars.
I just want something that will work reliably, not hydrolock my engine, and quick response time.
I just want something that will work reliably, not hydrolock my engine, and quick response time.
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04-14-2006, 05:15 AM
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Re: (elpiar)
Get the snow kit it is in your price range and it comes with everthing pump,hardware,controller that has 2 ranges for setting.We installed my buddys and used his washer resivoir for the smurf water tank.
04-14-2006, 05:30 AM
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Re: (jcoosi)
When my LS Vtec was JRSC I ran the JR kit made by aquamist and I never had any problems.
W/ a SC setup, what wrong with a pressure switch?
W/ a SC setup, what wrong with a pressure switch?
04-17-2006, 08:16 AM
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Re: (elpiar)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elpiar »</TD></TR><TR><TD CLASS="quote">pre charger or post charger? anyone?</TD></TR></TABLE>
Post.
Why would you cool down the intake charge before you compress and heat it up?
Water droplets hitting a compressor wheel spinning at 70,000rpm, designed for air flow isn't the greatest idea in my opinion either.
Post.
Why would you cool down the intake charge before you compress and heat it up?
Water droplets hitting a compressor wheel spinning at 70,000rpm, designed for air flow isn't the greatest idea in my opinion either.
04-17-2006, 02:04 PM
#14
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Re: (daveG)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveG »</TD></TR><TR><TD CLASS="quote">
Post.
Why would you cool down the intake charge before you compress and heat it up?
Water droplets hitting a compressor wheel spinning at 70,000rpm, designed for air flow isn't the greatest idea in my opinion either.</TD></TR></TABLE>
thanks for your perspective. Was there a discussion on this topic before?
Post.
Why would you cool down the intake charge before you compress and heat it up?
Water droplets hitting a compressor wheel spinning at 70,000rpm, designed for air flow isn't the greatest idea in my opinion either.</TD></TR></TABLE>
thanks for your perspective. Was there a discussion on this topic before?
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