You guys should recognize Mike Bonanni’s race car which just raced at Thunderhill. I’ll let him fill you in on all the cool mods he’s done to the car like the hood.
The BMW M4 F82 uses a twin-turbo inline-6. To cool the air coming out of the turbos, BMW used an air-to-water intercooler. There’s not a lot of space as you can see to put in a larger core. So what do you do? You have to use a more efficient core such as from CSF with their B-tube technology.
This is Mike Essa’s Formula Drift race car sitting in the Borg Warner booth. Back in 2013, we did a sneak peek of his E46 build and Essa won the championship that year. Coincidence?
I think that’s an EFR 9174 with twin-scroll turbine housing. A heat shield with reflective gold tape helps protect ignition parts from the heat coming off the turbo and downpipe.
No radiator here as that’s mounted in the rear. That frees up space for this massive intercooler with an oil cooler mounted behind it.
Borg Warner has some prototype compressor wheels in development. This cutaway gives a good view of the ported shroud geometry and also how the compressor bypass valve recirculates the airflow.
These prototype wheels have way more flow. Like almost 20% more flow with basically the same surge line. That’s impressive.