CoyoteKiller

Have exchanged a few private messages with WShupe on Cummins Forum. It sounds like his main interest is making maximum power for any given setup. Not a bad endeavor in the world of diesel competition, and I understand he is quite good at what he does. For on-road use in California, I have to be willing to make some compromise for smoke control. Will probably go with the F1 AF Mach injectors.

Just sent a private message to WShupe on Cummins Forum. We'll see what he has to say.

I found this on Cummins Forum, looks pretty interesting: http://www.cumminsforum.com/forum/94-98-performance/1608546-injector-breakdown.html

I've heard of Weston injectors, but never been able to find them.

Thank you for responding. Everyone his indicated that water injection is not really useful in my situation. One of the respondents (JOHNFAK) even tried three systems before giving up on water injection. This is the kind of information I was looking for. Thank you, JOHNFAK. So, water injection is no longer a consideration. Regarding the upcoming injector upgrade, that is still in question. F1 has a good reputation for low smoke, which is important to me. Unfortunately they have ceased production of the Mach 3, which was 130 HP 7 hole SAC. This would have been my 1st choice. That leaves me with Mach 2, a 7 hole SAC rated at 105 HP, or the Mach 4, a 7 hole SAC rated at 150 HP. I'm leaning toward the Mach 2, but wondering if it will be adequate to spin the 64/71 turbo at efficient operating speed. Any suggestions? Please don't tell me the F1s are too pricey. That's for me to decide. I'm only interested in the most efficient, low smoke injectors possible.

I just refilled for the first time since changing to the bigger turbo. 21.7 MPG, compared to 22.3 before. I was expecting it to be lower, since I've done quite a few runs on the Butt Dyno just to feel the power surge. I've also blown past a few Priuses for pure enjoyment. You've gotta have some fun in this life! So considering everything, I'm VERY pleased with the truck the way it is. I'm pretty certain that 22 MPG is realistic if I could stop enjoying the adrenaline so much.

I started this topic to find out if water injection was worth consideration. What I found out is I'm doing everything wrong because I'm not exactly like you. Please excuse my inability to accept that there is only one way to do things, your way.

The 64 is staying! Bigger injectors will be going in sometime this summer. It definitely feels more powerful. I don't give a dam about horsepower, since it's just a calculation. What I care about is passing slow traffic quickly, and that is now a reality.

I have a 62/65/13 High Tech stainless sitting in the corner which I just took off. I put on the 64/71/14 for great passing power. The power band is now exactly where I want it: 50-90 MPH in about 3 seconds. WOW! I love it.

Forgot to add the Juice Touch tuner to the description. I run it on 5X1 all the time. The performance of this truck is amazing! It is, after all, just a big boys' toy that gives me a lot of enjoyment. So it's unanimous that water injection is not going to improve anything. That's what I needed to know! Thanks guys. PS - I haven't yet figured out how to add a picture or build signature.

It sounds like there was a misconception that the truck is running hot all the time. On flat land, I'm seeing 0-1 PSI at 60 MPH, intake air of 100-140F and exhaust temp of 400-500F. The temperature only goes up on the long uphill sections, which is entirely expected. I just thought it would help to lower the temperature on the long ascents. Bigger injectors will be going in soon, after some other things are done. Unfortunately, there is more to life than diesel trucks!

Gee, I'm surrounded by the administration and it's board of directors. Guess I will return my truck to stock and go home. I'm just grateful I don't have a loose rear end like yours!

Wanna race?

Mopar, there's a lot of flat land in the background of your picture. I live at 1,400 feet elevation at the base of a 4,000 foot pass, so there is a shortage of flat land around here. Cruising at 1 PSI at 60 MPH is something I do occasionally after getting well out of the neighborhood. On a 76 mile round trip commute, I'm seeing temperatures as high as 1,000 degrees. This is not conducive to good fuel mileage. The truck is equipped with a high flow stainless steel exhaust manifold from High Tech Turbo, 4" Flowmaster exhaust system, S&B intake system, a big High Tech Turbo intercooler, and a CFM intake manifold. I don't know what else I can do to improve air flow. Turbo is a High Tech 64/71/14 with DDP 75HP injectors. This is not a typical situation, so I thought water injection might help on some of the long, uphill sections.

I read somewhere on this site that keeping exhaust temperature below 600 degrees F will result in better fuel mileage. One way to accomplish this would be to set up a water/methanol injection system that activates above 600F and deactivates below 600F. The nozzle would have to be quite small to avoid extinguishing the combustion fire. An improvement would be to have a two stage system with a second, slightly larger nozzle that activates at about 700F. I believe Banks Power offers a new water injection system that has the ability to be temperature activated. The temperature trigger points I'm suggesting are, of course, subject to change. A wide array of nozzle aperatures are available. Does anyone have any experience with using water injection to improve fuel mileage? What I am looking for is real world experience in using water/methanol or water/ethanol injection in a diesel engine. Opinions may be useful if they are supported by scientific knowledge. If you want to express your opinion without any experience, be ready to back it up with physics, chemistry and math. I'm sure there are a lot guys out there in the 80,000 pound club that have been using water injection for years. Please help us all out with your vast knowledge and experience.