Fighting Track Temps

[amg6975]

Got the Mosselman extension kit installed and plumbed in series with my existing cooler. I neglected to take a single picture since I was in a big time crunch but basically the oil goes from the OFH to the main center cooler, then to the second cooler in the driver's side duct, then back to the OFH.

In this config, with ambient temps around 90F I was able to push as hard as I wanted for as long as I wanted, at Watkins Glen, on slicks. Oil temps were 250-260 consistently, and a couple corners of lift and coast would bring them down very quickly.

This still seems really high but our temperature sensor is in the sump so it's measuring the oil that has just passed through the engine, not the oil flowing to the engine like other platforms... I think 250 sump temp is probably pretty good.

The really surprising thing and what was the most encouraging is this extra oil cooler seems to have kept water temps ~10F lower compared to the nice cool 70F track day above. This tells me the oil passing through the engine is substantially cooler than before.

I'm really impressed how big of a difference a fairly small oil cooler made. This mod could be applied to the M3 chassis, utilizing Mosselman's kit, 1M duct, and AN adapters for the Oil Return Pipes you'll just need to cut vents in the wheel liner. Chuck their AN8 hose and cooler adapters and get AN10 versions.

The only real downside is you need to remove the lower snorkle from the intake box, and slightly trim the bottom port but this is how my car has always been since the snorkel doesn't fit anything in the 135 bumper.

[roastbeef]

we wouldn't be able to use that kit because our transmission cooler is in the pasenger duct. our oil cooler is in the lower part of the bumper scoop and exits to the bottom of the car. what were you using before the mosselman cooler?

[F4rmost]

Originally Posted by roastbeef

we wouldn't be able to use that kit because our transmission cooler is in the pasenger duct. our oil cooler is in the lower part of the bumper scoop and exits to the bottom of the car. what were you using before the mosselman cooler?

I believe this uses the 1M duct and mounts the cooler on the driver's side, not passenger. He mentions removing the lower air box snorkel.

[tdott]

This is probably an untapped market, someone should make an add-on oil cooler to pair with a do88 or something, maybe do88 can make a flipped version of their DCT cooler and find a way to route the lines without loosing the intake duct.

[roastbeef]

in my opinion, companies need to get excellent on the basics. we can make a giant cooler with 300% capacity, but if we don't force air through it, it won't be efficient.
coolers need ducting and a low pressure zone behind them to encourage airflow.

[amg6975]

Originally Posted by roastbeef

we wouldn't be able to use that kit because our transmission cooler is in the pasenger duct. our oil cooler is in the lower part of the bumper scoop and exits to the bottom of the car. what were you using before the mosselman cooler?

The second cooler is in the driver's side (left) where there are no coolers. My car is functionally an M3 so the DCT cooler and oil cooler are in the same spot as yours.

Originally Posted by roastbeef

in my opinion, companies need to get excellent on the basics. we can make a giant cooler with 300% capacity, but if we don't force air through it, it won't be efficient.
coolers need ducting and a low pressure zone behind them to encourage airflow.

Yes, agreed and I did this. Pretty much the whole lower scoop funnels air to the oil cooler, but adding more cooler surface and whole second scoop gets more air across more cooler.