My Methanol/water injection project

[AudiVWguy]

I realize that 40 psi is on the low side for what I'm doing, I'm gonna see what it looks like with a leaf blower hooked up. I can simulate air velocity, but not a pressurized system. If you come up with any ideas let me know.
-JB

[blackdogvan]

I think just 100+psi pump? There is some really good info on this site...

http://www.turbomirage.com/water.html

[Smokey Eddy]

Just need to find a good place to get the pumps without having to sell a kidney in the process.

Why does it have to be such high pressure?
If its getting vapourized anyways what difference does it make.
a beefy windshield washer pump out of a junk yard. There you go?

[jtanguay]

Just need to find a good place to get the pumps without having to sell a kidney in the process.

Why does it have to be such high pressure?
If its getting vapourized anyways what difference does it make.
a beefy windshield washer pump out of a junk yard. There you go?

you need to have at least more than 20 psi to overcome the boost pressure, but mostly you need the pressure to atomize the water.  the fine mist will vaporize almost instantaneously with the right temp  the higher the pressure, the finer the mist, and the better the vaporization. (to a point of course...)

[AudiVWguy]

I went put and looked at the set-up on the Audi, it has a Shurflo pump. Couldn't see a model number. Northern Tool has a 60psi version for $52.00, not too bad. Some of the other models didn't give pressure specs, you could probably call them or Shurflo.  
-JB

[AudiVWguy]

I called Shurflo (1-800-854-3218) and talked to them. They have a number of pumps. There are two kinds, shut off and by-pass. The shut off kind will will "shut off" when it reaches its rated psi. The by-pass kind will continue to run at its rated psi. But the guy at Shurflo said if you don't hook up the wire that shuts off the pump (when it reaches its rated psi) it will run like a by-pass type. I told him that the pump would be running about 30 sec at a time and if there would be any pump damage and he said no. I ask this cause the by-pass type are a little more expensive.
Here are some models that will work:
8000-543-220    (60psi  by-pass)
8000-941-260    (100psi by-pass)
8000-541-236    (60psi  not by-pass)

Places I looked at:
Northern Tool   1-800-221-0516
System Accessories  1-877-917-1199


Right now Northern Tool has a sale on the 8000-541-236  at $52.00. McMaster Carr has the 40psi misting nozzles that can run at 60 or 100psi, their out put increases with the pump pressure increase. You will still have to buy a few and experiment. The only parts left would be  a pressure switch and a selinoid to stop the liquid from being sucked in when it's not on.
Cheers,
-JB

[Sprockets]

Somebody stated a cheap solution to it earlier, but never followed up on it  The key word was pressure differential.  What I have done in the past on simple systems, was run a pipe from the water tank to the inlet manifold so the tank is referenced at manifold pressure.  So if the inlet is at 30psi, so will the water behind the pump, meaning it can still 'add' 40psi worth of pressure regardless  Just make sure everything is sealed up tight and able to withstand the pressure tho! I used to use aluminum tanks, and it worked a treat!

-Gavin