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Old 12-11-2008, 10:31 PM
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Home Made Water Methonal Kit

Whats anyones opinions on a home made water meth kit..maybe using a small fuel pump and nos hoses and nos spray tips?Anyone ever tried this or experimented with making there own water/meth injection?
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Old 12-12-2008, 01:20 AM
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i never made one but i had one..seems easy enough, a feed tank go to the pump from the pump to a solenoid and off the solenoid to the feed line to the elbow or where ever. you could use a momentary switch to spray it.
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Old 12-12-2008, 05:20 AM
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12v like garden sprayer pump, air line and a ether nozzle off of older deere tractor... get it at a junk tractor yard or just straight from deere then tank of your pref. im going to get like a cheap coolent tank replacement as they call it at like adv. auto. some switches thats bout all you need. im doin it.
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Old 12-12-2008, 05:53 AM
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Can't speak of how meth works in a diesel however I can say that in a gasser, you need it to be variable. Just having an on/off WI system will leave you with zero ability to properly tune and you will most likely just end up flooding your engine. Nevermind the lack of a spray control solonoid that will prevent drip drip down when the system is not running. Finally, most after market fuel pumps (at least walbro) run at around 245 liters per hour while most Meth systems run a 150 lph pump.
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Old 12-12-2008, 06:06 AM
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I think it is the controller that is a lot of the expense of the Meth injection systems.... They control on boost etc.
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Old 12-12-2008, 06:13 AM
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I have thought of this and my only speed bump is how to activate when EGTs get high or to when i want it to spray.
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Old 12-12-2008, 06:15 AM
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^^ Yup. You either have a controller that works off of Boost or Injector Duty Cycle and with these things being HPOP controlled injectors (or something like that..still learning), I'm guessing pure boost controlled controllers.
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Old 12-12-2008, 09:02 AM
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Well I don't know if you can "make" some kind of hookup to start it off a certain egt off of an existing egt probe
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Old 12-12-2008, 09:11 AM
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I thought the kits were variable delivery with a set injection curve based on boost and RPM?? I don't think it just meters the same amount constanly under all loads.
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Old 12-12-2008, 09:39 AM
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I built mine. It was easy. Get a 15 PSI Hobbs Switch from a parts house. You connect off of your boost line to it. There are two prongs on this switch. One is power in from an on/off switch, while the other goes to the pump. When the Hobbs switch sees 15 PSI it will close the circuit and power the pump. You can order the 150PSI pump from snow performance for $100. Then from the parts house you need to buy about 20FT of 1/4 " high pressure air line, and the fittings to connect to your pump, reservoir, splitter and nozzles. The nozzles can be purchased from Snow as well. They are about $35 a piece. I run a 325Ml per min. and a 695 ML per min. nozzle. This set up gained me 67.5 HP at the wheels on a mustang dyno. I use a 7.75 Gallon pony keg mounted to the inside of my bed with a bulkhead fitting running through a hole in the bed to the pump mounted on the underside of the truck body. The two nozzles are mounted to the backside of my intake elbow. You will need all 1/8" pipe fittings and an 1/8" tap. Hope this helps.

Hobbs Switch: $40
Pump: $100
Air line: $20
Keg: FIND ONE FOR FREE!
misc wiring: $10
On/Off switch: $4
Nozzles: $70
Fittings: $20
Total: $264

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