Quote:
Originally Posted by CSF Cooling
You have had a very different experience than every other customer who runs our radiator - this our #1 selling BMW radiator, and we have countless 3rd party validation from customers who are happy with the performance of this radiator.
Bleeding the system correctly + making sure stacking of coolers is not effecting proper airflow is crucial. If you have a high horsepower performance build, or tracking in extreme conditions - adding hood vents to allow hot air to escape would be recommended.
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If CSF was a professional cooling company, they would not be recommending such a small surface area radiator to be used for tracking a high powered Z4 in extreme conditions.
Here's my log from three laps in 37C / 100F heat at ningbo international circuit.
https://datazap.me/u/asbjoern/bq-v9-...-6-14-21-23-30
Coolant hits 116C on second fast lap.
Mods:
CSF rad
Dual oil coolers
DCT oil cooler
7.5 HD FMIC
I then downgraded the FMIC to a non-stepped one to allow more flow to the CSF radiator. I then hit 120C after two laps in similar conditions, and iats went through the roof.
https://datazap.me/u/asbjoern/ningbo...-6-14-21-23-30
Now I am running a completely revised setup, see attached pictures. I run the CSF together with two aux radiators to increase total surface area. Now coolant mostly stays below 111C. Here's an example from tracking in 26C ambient. Looking forward to see how it performs as it gets hotter outside.
https://datazap.me/u/asbjoern/bq-v31...14-20-22-23-28