I have a hydra and can log coolant temps. From what I've seen so far coolant temps have not changed... I run the car with a/c on full blast in Houston heat all the time. I can say I have not tested it on the track, but that time will come soon.
The charge pipe off the turbo is 1.75". My initial plan was to route the pipes under the manifold, but instead I rotated the turbo upwards and came out with a 90... Made fitment much easier, and if I ever need to pull it out it is really easy.