Heat Soak Issues with M3/M4?

[drroc]

Originally Posted by mKilgore

For those of you running 100 octane, or a mix, do you run a particular tune for that? Or can you run it on a stock tune, CS tune, stage 1 or 2, etc.? I ask because I am going to Laguna in a couple of weeks and understand they have either 91 or 100 at the pump there at the track. I'd rather run 100 than the 91 if possible.

I just run a regular tune and use 100 octane to avoid surprises. The long hill climbs at Laguna really stress things out.

[SilleM3]

Originally Posted by MaynardZed

Yes, I wish someone would track their car hard with race pads, track tires, A/C on max, and in 100 degree temps so we can be absolutely assured that the car will not have any overheating problems.

Tracked my car this past weekend. It was 98 degrees. When I pushed the car hard oil temps would get to 235-250F. I had to take it easy two laps then go hard again. Coolant temps didnt budge at all the whole day. Had AC on allday didn't even know. On the street in sport plus the car oil temp is 190F. Car would get to 240F after like 8-10 laps.

Car has a fully built motor low boost e85 600whp 521trq.

Mosselman ML65-80 turbos
FTP turbo inlet pipes
Deka stage 3 clutches
Wagner tuning TMIC
Dinan coil packs
CSF DCT cooler
CSF Auxiliary radiators x2
Mishimoto Oil cooler
Mishimoto Heat Exchanger
Mishimoto Coolant Thermostat
Mosselman oil thermostat
Bend Calibration flex fuel filter
Precison raceworks stg 3 brushless LPFP
Bimmerworld additional fuel tank fuel pump
Bimmerworld extended oil pan sensor
ARM downpipes
BM3 Flex Fuel kit
Ecutek
Motiv reflex
BMP port injection
ID1050cc injectors
Bend calibration full Flex fuel tune
AWE Sport exhaust
BMC DCT extended oil pan

[HA55L3R]

Alright so I was able to switch out the intercooler pump with a CWA100-3, which moves water 2-3 times faster than the stock one. Before my IAT's were around 50 over ambient, and now they're at 35 over ambient with the pump being the only change. IAT's drop incredibly fast on cool down laps as well. Huge improvement and relatively cheap, but it was kind of a pain in the ass to install. The signal from the car isn't compatible with the pump so I hot wired it with a switch in the cabin and used my tuning software to ignore the code.

[sly1types]

Originally Posted by SilleM3

Tracked my car this past weekend. It was 98 degrees. When I pushed the car hard oil temps would get to 235-250F. I had to take it easy two laps then go hard again. Coolant temps didnt budge at all the whole day. Had AC on allday didn't even know. On the street in sport plus the car oil temp is 190F. Car would get to 240F after like 8-10 laps.

Car has a fully built motor low boost e85 600whp 521trq.

Mosselman ML65-80 turbos
FTP turbo inlet pipes
Deka stage 3 clutches
Wagner tuning TMIC
Dinan coil packs
CSF DCT cooler
CSF Auxiliary radiators x2
Mishimoto Oil cooler
Mishimoto Heat Exchanger
Mishimoto Coolant Thermostat
Mosselman oil thermostat
Bend Calibration flex fuel filter
Precison raceworks stg 3 brushless LPFP
Bimmerworld additional fuel tank fuel pump
Bimmerworld extended oil pan sensor
ARM downpipes
BM3 Flex Fuel kit
Ecutek
Motiv reflex
BMP port injection
ID1050cc injectors
Bend calibration full Flex fuel tune
AWE Sport exhaust
BMC DCT extended oil pan

Sounds like a cool build.

Any dyno graphs of your track tune? What are you making on DI with Ethanol max effort?

I have been looking at the Mosselman or Pure HF turbos and then do a Dorch lift kit, i already have Eu5 injectors.

[SilleM3]

Red line is my daily map. Blue line is my map for when I go to the road course E50-E85