We've got great specials going on right now if you wanna strap on one and be the first RK S2 in the books!
I've been on the fence for a while, but your kit is definitely the most sorted out in my opinion and would be my first choice.
In regards to heatsoak, is it fair to say that any supercharged e39 m5 will most likely run significantly slower on a hot day or after a couple of acceleration run without an intercooler or methanol injection? I remember watching an M5 with a VT550 kit on a dyno pull event and each consecutive run the WHP fell dramatically. Maybe 50 hp from 1st to final pull.
Track conditions and density altitude will have a huge effect on results, even with IC and/or meth. Of course, driving skill plays a role as well. Drag racing might be dumb, but it sure isn't easy in a nearly two ton car with IRS.
A S/C'd car without any intake cooling will quickly heat soak and disappoint. I always iced the plenum, discharge tube and Vortech between runs. Even so, on warmer days the car would come off strong and then lay down on the back eighth. I could feel it pull timing as the IAT's rose in mid-run. That's a bummer when you pulled a 1.7 60'. An IC or meth would likely remedy that issue.
My 11.7 runs were before I installed the methanol injection and I only had one occasion to run with meth on my home track. In back to back pulls I was .3 quicker and 3 mph faster without the meth. Too much fueling on a cool day? Not sure, but that's what it felt like. Your results may vary.
Sounds like 11.7's are about as quick as a supercharged e39 will run for now? How much slower would you be with standard performance tires? The reason I ask is because I have a couple buddies with E55's and they destroy my M5 from any speed, especially from a dig. One is modded and has pulled a z06 from a roll. I was hoping to compete by adding a blower and showing them true M Power, but not sure it will be enough.
Do you happen to know how much rap the Buckhead M5 is producing?
Why obsess with 1/4 mile marks? A more usable metric is 60 to 130 time. Take 3 runs back to back to back, pick the median. It eliminate bad driver/launch and takes into consideration of heat soak. Anything under 10 sec is respectable, under 9 is fast, under 8 monster!
I agree with you there. I'm far from an expert in launching my car and most my buddies like to do a pull from a roll to eliminate launch variables. However, not too many e39 M5 drivers seem to post 60 to 130s as well. I believe Clemster posted a 9.xx sec time.
Thanks fellas for the input!