My plan this year is to run at least a 75 mile cruise 12 consecutive months. We can get -30 below here for extended times So at least one month is going to be pretty cold. So far I run my 6-71 at 20 deg f. We drove about 80 miles that day. Many days in the low 30's without a problem. Runs great. I ran a top fuel funny car at 28 deg way back and ran pretty good for the day. The track was pretty cold so I just started in high gear. Used of a little clutch but it got down the track and we got paid.
As for rain yesterday makes 2 days already this year in a downpour. Both have been over 75 miles of non stop rain. I have a BDS scoop fully out in the wind with K&N filters freshly serviced. All that happens is that the AFR goes about .5 leaner. Happened both times. You won't be filling the cylinders with water. What does water injection do but pump water in.??? One thing for sure is you won't be stepping on it if you value your life or car.
Not only did I get wet driving but the car sat out in the rain for a couple hours. Then since it was already a mess I drove it over to BK for dinner in the rain. It's still raining now and I'll be going out again shortly. The big Hoosiers work quite well in the rain...just be carefull. The rain also helps cool the exhaust pipes. I noticed that my normally blistering hot E-brake handle was cool in the rain.
I built this car to drive and I plan on doing just that, rain or shine. I already found that the Hoosier are simply awfull in the snow last winter. I just had to try it out haha
At least it is fiberglass so the salt in the winter won't bother it. haha