Quote:
Originally Posted by ZM2
Another update:
Was out at Summit Point Main yesterday and hit a new PB of 1:19.8, which is the fastest street tire (RE-71RS) M2 time I know of and just a couple tenths off the fastest slick tire times. If I fixed a couple mistakes and had fresh rubber, would be in the 18s and prob the M2 record on that track. Not bad for a non-stripped out daily driver. 
Here's a Summit Point log: https://www.bootmod3.net/log?id=65fd...363507f17cda28
And my last outing at NJMP: https://bootmod3.net/log?id=64e79931d10b430714658c01
Notes
-This time I ran a slightly boosted version of the newer Stg 2+ Mutlimap OTS map. Guessing I was 450-455whp in the NJMP log with the current OTS, 465-470whp in the Summit Point log (I was fast enough to hang in the draft on the straight of a last gen 911 Turbo S tuned to ~600hp).
-Still running glycol b/c of sub-freezing night temps here
-Still cooler ambient weather, so still no idea how the car will handle higher summer temps with water + wetter
-Now running Bad Ass Racing oil 5W-40 vs Motul 300V 10W-40
-Using a more aggressive front pad compound, so more aggressive braking
General observations:
-Ambient temps were about 20F lower for Summit vs NJMP
-Top speed was ~10mph higher at Summit
-IATs remained in check with highest constant WOT delta of 35F (30F at NJMP). More power, and longer straight away at Summit...
-WGDC staying mid-80s on average
-Peak coolant and oil temps are similar between the two logs. At Summit, 258F peak oil temp (perfectly fine), 253F peak coolant temp (still too high)
-Coolant stays in the 242-253F range during hot laps
So, absent more data I'm guessing coolant temps will go too high in the summer at faster tracks like Summit, WGI, etc. Still need a warmer day when able to run water + wetter (vs glycol) to determine the outcome. |
Haha nice to hear the awesome laptimes!
The issue is that the m2's radiator is just so fricken small, it's hard to tell in photos but if you've ever held one in real life, it brings to perspective just how small it is. Even compared to some other cars and their radiator, the n55 just has an unacceptably small radiator, and even worse all the air that feeds it is primarily from the tiny kidney grilles. Because the radiator primarily sits above the lower opening.