Project S2000 Part 7 – Cold (For SoCal) Weather Fun

 Project S2000 Part 7 – Cold Weather Fun

By Khiem Dinh

Khiem Dinh is an engineer for Honeywell Turbo Technologies at the time of this writing.  All statements and opinions expressed by Khiem Dinh are solely those of Khiem Dinh and not reflective of Honeywell Turbo Technologies.

Our previous track day was in the middle of the freakin desert during the heat of summer to see how the cars’ various systems handled the almost 100F temps. The upgrades of the Koyo radiator and StopTech brakes took the heat thrown at them and didn’t even break a sweat, but the stock oil system wasn’t up to the task and probably wished it could have sweated to get rid of some heat. Before the end of last year, I hit up Streets of Willow with Speed Ventures to test out the car’s systems in cold weather along with the new chassis bracing. More recently, I did the Speed Ventures brand of auto-x with a dozen co-workers for a friendly intra-work competition, but more on that later. The great thing about cold weather is it helps with durability and reliability. Heat is the enemy of track cars and causes problems such as over heating coolant, oil, tranny fluid, diff fluid, brake fluid, brake pads… you get the idea.

The forecast was for early morning temperatures in the 30Fs with the high being in the mid-60Fs. I figured with the cold temperatures, I’d try a test and run the standard 10w-30 oil weight instead of the 15w-50 I used in the heat of summer. Also, with SOW being a relatively slow track combined with the cold temperatures, I left in the StopTech street brake pads instead of swapping them out for track pads. I did hook up my ghetto brake cooling as I figured more cooling wouldn’t hurt.
The results of my experiment were mixed. The coolant pretty much stayed a constant 89C the entire day aided by the big Koyo radiator. On AP2 S2000s, 89C is the temperature the thermostat maintains for the coolant, so no coolant temperature issues here. As a note, AP1s seem to have a thermostat that maintains a temperature 5C cooler from what I’ve researched.
Do you know how I know the foam strip was doing its job of blocking air? I had to add some tape to keep it in place because it had gotten blown out. 


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