Quote:
Originally Posted by Jeff@TopGearSolutions
Thanks for your continued support!
You live in extreme conditions so the data should be interesting.
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Well all of this, FMIC + JB4 + meth is hopefully in preparation for either super RB type hybrid turbos or a big single. Heat management is the key and much of what people do down low doesn't apply up here, not just because of altitude but fuel availability as well. 91 octane is the best pump and no e85. So it is just 91 + meth and tons of heat.
The hybrids make power with lots of boost and lots of fuel and lots of stress. It may be the single with very short runners (like PTF) to minimize radiated heat & lag, running same or less boost but not as stressed (ergo not as much heat) is the way to go. Trade offs everywhere including of course budget. At 12k ft ambient is 10 PSI so if you run a 3.0 pressure ratio you are still only at a pathetic 30 PSI absolute. Where as sea level a 3.0 PR is closer to 45 PSI absolute and 30 PSI boost.
High altitude tuning for boosted cars is like setting up a Pike's Peak hill climb car basically, I am not sure anyone is paying attention to it on the N54 yet. BTW Bandimere is not high altitude
The other thing is it is very difficult to get full 3rd gear pulls done around here, as you might imagine. There are places at 6500-7k ft where you can sneak some runs in but high up, no way. Not just cops but winding roads with no guard rails and 2000 ft drop offs kind of limit what you can do logging-wise.