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Old 07-08-2012, 02:31 PM   #55 (permalink)
Gr8twhite
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Join Date: Jul 2012
Location: Canada
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Quote:
Originally Posted by oil pan 4 View Post
How much water do you use?
I like to use about 2 gallons of water to each gallon of fuel burned. But on long road trips I use closer to 1 gallon of water to 1 gallon of fuel because I just cant carry enough water.
If you start the water injection at 5psi then I bet its hardly ever on.
I run my water all the time when I am at speed.
Before water injection I could never get over 20mpg towing, now with water I consistantly hit 20mpg all the time no problem. Last road trip I had one tank under 20mpg, before water I would get 18-19 most of the time and maybe see one tank over 20mpg.
Last road trip the suburban consumed over 200 gallons of water.

I still plan on running water a 03 duramax intercooler.
Dunno how much, but it will drain my 8 gallon tank when towing up a grade and on full spray in less than an hour.

Makes sense when you think about it; 10 GPH, full spray, 8 gallon tank, less than an hour capacity.

My truck cruises at 5-6 psi at highway speed. My spray is just tipping in at that point. Anything besides flat running gets more than 6 psi easily.

I'm glad you see mpg improvement, but I see none....even when at full spray.

As I said, YMMV.

My next move is to rework my calibration ("tune") and return to the stock vacuum system to dump boost at speed, attempting to reduce drive pressure and pumping losses through the turbine when they're not needed.

Well, that's the experiment at least.......

Got a few aero tricks in mind, but mostly for highway running. Pretty mild really, don't want to change the looks of the truck too much.

Time to rig up the magnehelic again and get some fresh pressure readings.....
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