The vehicle is a 1987 Mercedes 300D, with a 3.0L turbodiesel. Boost pressure is 14psi. The nozzle is located maybe 8 inches from the compressor outlet. I installed an AutoMeter intake air temp gauge to verify that I'm getting a reduction in IAT's with the water injection, which I am. At sustained full boost, without injection, IAT's are in the 200-220F range. With injection turned on, the temps drop to 150-160F, or if I have injection turned on from the beginning the temps don't rise above 150-160F. So I am getting a reduction in IAT's, but again there's no visible change in EGT's. (Ambient temp for the above data is 50-60F.) My exhaust is approx 2.25" diameter and I only have one muffler at the rear of the car, nothing else.
Photos:
I don't have a current photo of the nozzle, but it's installed on the diamond-shaped blank plate:
http://www.w124performance.com/image...EGR_after2.jpg
Here's a photo of my exhaust manifolds and turbocharger:
http://www.w124performance.com/image...hermo-tec4.jpg
Here's a photo showing the location of my EGT probe:
http://www.w124performance.com/image..._intstall1.jpg