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Location:
Lost in the K hole
Registered:
May 2002
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Location:
On your mum!
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 08:08
 
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Most of the EFI pumps use the fuel to cool the armature, I am not even sure that the fuel pump would work with water running thru it.
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Registered:
June 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 08:15
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Most external fuel pumps run a roller bearing pump on high tolerances. The slightest amount of rust kills them instantly. You may have problems there. If you can find a fuel pump that is of the vane design you may have a better solution. Some VDO pumps even use a plastic vane. The diaphram pump sound like the go.
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 09:06
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Those SHURFLO pumps are really freakin expensive. They are commonly used on luxury boats for deck hoses, showers and the like.
How about a dedicated water injection pump. MRT Performance sell these? 
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 10:00
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SHURflo abound on ebay for US$40-50
think i might just get one of these. theyre pressure demand switched and regulated at 45psi - sounds good for regular injector use to me 
cheers
ed
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 10:14
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| ed_ma61 wrote on Tue, 22 July 2003 20:00 |
SHURflo abound on ebay for US$40-50
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Damm I wish I found these a while ago. I have paid up to $600 for these in the past 
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Location:
MACKAY
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 12:03
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OK a tested and proven method to stop detonation and increase power ..
Stainless steel tank ( 4ltrs or so ) efi pump , pressure regulator , 2 Hobbs switches , a relay , some efi line , large injector .
Set this up the same as for standard efi system , fit the injector about 300mm before the throttle body ( this gives time for atomization and equal distribution ) wire the injector up to one of your existing injectors via a Hobbs switch , wire the pump up via a relay and the other Hobbs switch , set the Hobbs switch for the pump to about one lb and the Hobbs switch for the injector to what ever boost you want it to start , make sure you use a injector with the same impedance as the one's in your motor , This is not for water injection but for Methanol injection , You can't use straight Methanol as there is no lubricant in it and the pump need to be lubed , So the best mixture I have found is to 1 liter of methanol add 50 ML of mineral turps ( This acts as a cleaner for the system ) and 20 ML of Castrol M ( This is the lubricant for the pump ) .
Any other Q's .
Trevor
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Location:
Melbourne
Registered:
May 2002
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Re: Water Injection Pump...
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Tue, 22 July 2003 13:02
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Would a fuel injector give a fine enough spray to be mounted pre turbo and not cause damage to the compressor wheel?
would be nice to have one pre turbo to basicly clean the intake path (better heat transfer with an internaly clean intercooler!) and one pre throttle body!
Guess if it does eat the compressor wheel I would just have to get it hi-flowed!
Allan
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: Water Injection Pump...
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Wed, 23 July 2003 00:18
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I'd be more worried about pumping a combustable mixture through all of your intake plumbing including intercooler etc than whether it would damage the compressor. One backfire and there could potentially be a lot of damage, it would be pretty spectacular though.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Water Injection Pump...
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Wed, 23 July 2003 00:31
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a simple 50% water/methanol mix is neither combustable nor have a flashpoint, so its pretty safe...
allan - i once read if you can get a spray atomisation under 5 microns (i think - could be a bullshit number i just made up) then you minimise the risk to the compressor wheel. to achieve 5 micron atomisation, you need ~40psi and a regular fuel injector type jet
cheers
ed
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: Water Injection Pump...
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Wed, 23 July 2003 00:53
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| ed_ma61 wrote on Wed, 23 July 2003 10:31 |
a simple 50% water/methanol mix is neither combustable nor have a flashpoint, so its pretty safe...
ed
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That's true enough but the system TA22-3SGTE was describing is is 93% Methanol. This was the post directly before Allans.
My reply was aimed more at making sure people with shall we say "V8 supra" style technical knowledge, who may end up reading this, didn't try and inject a combustable mixture at the beginning of the intake tract and then wonder where all their pipework went.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Water Injection Pump...
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Wed, 23 July 2003 01:01
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| Joshstix wrote on Wed, 23 July 2003 10:53 |
My reply was aimed more at making sure people with shall we say "V8 supra" style technical knowledge, who may end up reading this, didn't try and inject a combustable mixture at the beginning of the intake tract and then wonder where all their pipework went.
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good call - yeah, 93% methanol running from in front of he compressor wheel is 'bad'
Homer- *Kaboom* *Blam*
Marge- "homer, whats that noise?"
Homer- "huh? oh, nothing"
Homer- *BOOM*
Marge- "Homer?"
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Location:
Melbourne
Registered:
May 2002
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Re: Water Injection Pump...
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Wed, 23 July 2003 01:56
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coolies 40psi not a problem! next thing I need is a cheap AIC!
Allan
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