At the end of the 2nd row starts the pics from the D’s water meth install:
I think it worked out really well. Total parts bill came to around $200. The hardest part of the whole project was finding the right tank that would hold at least a couple of gallons and tuck into the rear quarter trunk area without taking up too much space. eBay came through again with that as well as a very nice stainless medical-grade gear pump that seems to match up with the chosen nozzle quite well. The pump was only $50 so I got two to have a spare, but doubt I’ll ever need it. I suspect they probably cost hospitals using them in dialysis machines a few more bucks than that. The most time-consuming portion of the work was fashioning the pump mount bracket. It had to be hand-crafted from scratch, pseudo-forged with oxy-acetylene from a muffler clamp and steel strap rounded to match the inner fender curve it’s bolted to. Activation is achieved with a simple boost switch grounding the pump at around 20psi. There’s a power cutoff switch in the cabin by the trunk release in case it ever runs low away from a water source.
Initial road testing was done with the feed line running into a gallon jug in the cabin. This way I was able to easily determine boost switching behavior. I guessed setting it at 20psi might be close to what it needed and that was a good guess. it comes on at anything more than modest acceleration but does not engage at cruise on the highway until about 85mph on level terrain. That probably equates to something like a 10-20% duty cycle for typical driving, running enough to hopefully keep the intake clean and providing a little kick and cooling when needed. Consumption is coming in right where I wanted it on the Aurora commute at about a 2-1 fuel/water fill-up ratio, or consuming a gallon of water-meth per tank of fuel in typical driving.
With the JBD fueling chip now also re-installed and adding another 90hp, the car should be running over 350hp and well over 500ft/lbs torque. My butt dyno confirms these figures, and the “D” is now a real sleeper corvette-killer. Roll-on thrust at highway speeds above 70mph is just phenomenal. The best part is the CCV and water/meth injection mods should keep carbon buildup at bay in the future. The W/M adds maybe another 20hp over the “on paper” 350hp guess derived from the factory rating + 90hp in additional JBD fuel. It’s only one small nozzle, but seems well-matched to the 3.0L powerplant.
Only a Motorguard bypass oil filter remains to complete the D’s planned mods. I have a Cat fuel-water separator I’d like to put upstream of the factory unit, but cannot yet see a way to do that.