Hey guys, thought I'd update the thread with this year's open track battle observations.
Max temps:
Ambient - 95F
IAT - 155F
Oil - 270F
Coolant - 256F
IATs were 10F lower than last year but matched ambient being 10F lower, as well. Oil/coolant max temps were similar to last year.
So, no real change in max temps if I kept pushing the car for an extended period, but I'm putting out a decent bit more power as evidenced by:
-I only made power mods to the car since last yr (already had suspension and AP BBK)
-Me being able to keep up on the straights with my Uncle's supercharged E93 (567whp) if I had a good run off the corner
-Top speed was 124mph this yr, vs 118mph last year
-Lap times were 3sec quicker than last year, even tho we were running RE-71R's this yr, vs R7s last yr
-M Laptimer comparison showing consistent time gain under power on the straights, and a little extra time gain under braking (using new Ferodo DS3.12 pads, which are great!)
Hardware changes since last year, include:
-Motul 300V vs BMW 0W-30 (I noticed 10F reduction in oil temps when doing BM3 test runs/logs)
-Dinan IC changed to Wagner Evo2 Comp IC (definitely sheds heat much quicker during BM3 logging)
-Replaced stock downpipe with HJS 300-cell DP (nice additional power bump & sound)
-do88 remote radiator (already had CSF main radiator and DCT & oil coolers last year)
-BM3 Stg 2H E30 tune & fuel vs Dinantronics Stage 4 with 96 octane (93/100 octane mix). Halim has been a huge help over the last few months in creating a Stg 2H E30 tune based on my logs, and the E30 keeps much more consistent power levels than pure gas as IATs get into 125-150F territory, see the MAF and timing values in the links below.
While max temps ended up being the same as last year, the hardware changes helped temps to increase more slowly, and the E30 helped me maintain consistent power levels as temps got high.
To add another interesting data point, below is a 100 octane session on the Stg 2 Race Gas map and one of my Stg 2H E30 sessions with E30 fuel. Boost actual vs target, MAF, and timing values remained higher with E30 vs 100 octane and the Race Gas map, even tho ambient was 10F higher during the E30 log!
Stg 2H E30:
http://www.bootmod3.net/log?id=5d3a12dac090c65ddbf48125
Racegas map with 100 octane:
http://www.bootmod3.net/log?id=5d39e50bc090c65ddbf480c0
Next step is likely WMI, as that will provide IAT cooling and give a little additional fueling, and maybe have an impact on how quickly engine temps increase.