Water/Methanol Injection on the OM617.95

[240D 3.0T]

I now have the Water/Methanol Injection kit installed. I've got it set to kick on at 13.5psi (14psi running boost pressure) and it turns off at 12psi. There IS a noticeable "seat of the pants" boost when the pump turns on. I've got the seatbelt light setup as the "on" light when the boost switch opens the solenoid. After filling up with some $0.93 Wal-Mart windshield washer mix (Winter blend, summer blend has no methanol in it) there was an even better response. I'd even bet money I've broken the 100whp mark, but I'll wait for proof after next months dyno run. No EGT readings to report since I have not received the pyrometer yet. No 0-60 time yet since it's still too windy today for any good results. But, the down side is it chugs the water/methanol mix. It used a little over 1 gallon after about 3 minutes of my test run. Also, 2 seconds into operation the boost will fluctuate between 13.5-14.0 for a second then stabilize at just shy of 14psi. Intercooler effect making the air more dense? Top-front view of my engine today. Not seen is the boost switch on the firewall. Tap in the lower right of the 2 gallon tank. A picture shortly before I wired in the switch and tied all the wires down. The nozzle threaded into the '79 SD manifold's stock port without changing the threads. A view from inside the intake. (Note how clean it is without an EGR or CCV fumes to muck it up.)

To remove this ad, register today or login if you already are registered!

[240D 3.0T]

Video 1.1MB Needs WMP 10+ for windows or VLC media player on Macs.

I just finished installing my ISSPRO pyrometer and a few test runs. As you can see from the video, I was surprised to see it get that hot. The video cuts off a little short, but it got to 1400*f by 4500rpm. It seems the water injection does NOTHING to lower EGT's. There was no difference between runs with/without it.Sitll, it does give the engine a little more "kick".

Next mod in line for installation, air-water intercooler.

The boost gauge on the right is for exhaust manifold pressure. There must be a leak near the gauge because it pulses/vibrates while under load.

[jimbo1mcm]

Post pix when you put the new engine in.

[husk323]

lol

[CE750]

Pretty cool... Propane injection is the way to really get the HP up. have you though of trying that?

[240D 3.0T]

Originally Posted by CE750

Pretty cool... Propane injection is the way to really get the HP up. have you though of trying that?

I do want to try it. I'm just running out of trunk space!

18 gallon auxiliary fuel tank, 2 10" subwoofers/amp/box, extra 2 gallons of injection mix, emergency gallon of fuel, spare tire, tire tools, and a small 12x5" toolbox.

Unless I can find the right tank to hang where the stock rear muffler was, I won't have any space left for it.

Propane does not quite have the kick in IDI engines as it does with DI, so it's tward the lower end of my list.

[CE750]

Originally Posted by 240D 3.0T

I do want to try it. I'm just running out of trunk space!

18 gallon auxiliary fuel tank, 2 10" subwoofers/amp/box, extra 2 gallons of injection mix, emergency gallon of fuel, spare tire, tire tools, and a small 12x5" toolbox.

Unless I can find the right tank to hang where the stock rear muffler was, I won't have any space left for it.

Propane does not quite have the kick in IDI engines as it does with DI, so it's tward the lower end of my list.

You've got a future as an automotive engineer... good work, but don't try this on a $60K CDI!

[240D 3.0T]

Here are the dyno results.

Runs-
1: No WI- 99.5HP/149.3TQ
2: Pure water- 99.9/149.3
3: 60% water, 40% methanol- 102.7/148.2

The red arrow is the point where the WI was triggered by boost pressure.

HERE is a video of the 3rd run. (Right click, Save as) WMP9 or VLC media player needed to view.