[Crumpler]

I have overlooked this aspect on the track car.
Meaning. I deleted a/c lines years ago and left the factory cooler in place — essentially without cooling. And then tracked the car. Blissfully ignorant of any detrimental consequences.
I’m cooling everything else now so here we go.

I removed the factory unit last night and return line on the rear wall last night. To make room for a new air intake intercooler. Long story.
I don’t know if design ever changed but in the S3 has a fuel cooler which is a brass cylinder about 10cm long with what look like internal fins.
While nifty design, not sure how effective it was.
I’m going to run braided 6an lines with a Derale fuel cooler in its place.

Conceptually, when you look at distance of return circuit going back into liters of larger volume “gas tank”, a small cooler still seems trivial.
Every little bit helps?

[worf]

Fuel cooler is the same(*) across all 928s AFAIK.

* There are three different castings, but the differences are not material to cooler performance.

Obviously, it was only effective if the A/C was on and working. For a track car a dedicated heat-exchanger is going to be better even if it’s small. But…

… the point of fuel cooling is to prevent vaporization of the fuel in the fuel system. Gasoline really likes to be vapor. It may be that an effective fuel cooler must be refrigerated.

This -^, all pontification; I’ve haven’t yet worried about fuel cooling.

Research required.

[Crumpler]

Understood.

Yes, vapor.
The only factor I could get worked up about.
I’ve never had an issue with the stock venting system, as long as in good condition.

[Crumpler]

Placement of fuel cooler.
Not sure how much cooling we are doing but hopefully net positive. It would look better if I had matched lines. But this is what I had laying around for pre made lines that work.

[worf]

Placement of fuel cooler.
Not sure how much cooling we are doing but hopefully net positive.

You have high-pressure air available at the base of the windshield and cowl. That’s 1/2 of the solution.

The other half is not turning the firewall plenum into a high-pressure volume.

A long time ago some folks ducted high-pressure air from the windshield into the back of the air box above the filter.

That’s another 3/16s of the solution.

The rest is figuring out ducting to put the fuel cooler between the high-pressure windshield air and the low-pressure air box.

[worf]

‘course you don’t have a low-pressure area there because your air box is relocated.