Just bought an S for the track

[MikenOH]

Good for you--I think you'll enjoy it.

One question--how many miles?

I know you are trying to keep the mods down and adding a third radiator is a good way to go, but have you thought about doing the IMSB change out and/or various things you can do to prevent that from becoming a problem?

Here's one place to start to gather info but certainly not the only one:
Products: Performance and Enhancement Products for your Porsche

[thstone]

Originally Posted by MikenOH

...adding a third radiator is a good way to go ...

The S model already has the third (middle) radiator as stock along with the larger oil cooler.

Before you start fabricating a new cooling system, you might consider the following;

1. Improve air flow: Take a look at using a different nose (like a GT-3) that has larger inlet air ducting and better output air flow for the existing cooling system.

2. Improve radiator efficiency: Consider replacing the old stock radiators with a new higher efficiency radiator. Old radiators are known weak links in any cooling system.

3. Increase thermal capacity: Consider adding an oil sump extension to increase oil capacity and thermal capacity. All Porsche engines use oil cooling to some extent.

4. Increase oil cooling: Now that you have more oil, consider adding an external oil cooler. Take a look at locations where other Boxster spec cars place the external power steering cooler; this location in the rear might also work for an external oil cooler.