11Budlite

I have a Tillett W1I-40 in my S3 and I can confirm that it is 35cm at the narrowest point. It's a really tight fit in a S3 Caterham!

There are different wing stays for different size wheels so you'll want to reference what wheels you have.

According to the Tony Weale book, they were 8" drums from a Triumph Herald. This should show details of the assy, parts #2,3,4: https://canleyclassics.com/?catalogue=triumph-herald-1200&diagram=triumph-herald-1200-brakes

I think this is the most plausible answer for the two bumps at the back of the bonnet. I would assume there are openings at the rear to let heat out and possibly defrost the windshield. I can't think of any other reason to have those two bumps.

There should be two adjuster cams accessible on the back plate at the two locations circled in yellow. If these are backed all the way off, then perhaps the two return springs have lost there tension and can no longer keep the brake shoes from dragging on the drums. Those shoes seem to have a lot of material on them, are they new?

I have no idea about the 2 domes in front of the windscreen, but I'm assuming the 2 near the carb scoop are for clearance to SU carb dashpots. Since the engine is supposedly a 1.2L it could be an BMC A-series which would typically come with 2 SU's.

I've been using Puma Speedcats for the last 5 years for trackdays in my S3 and find them very comfortable and acceptable on track. I'm sure they aren't as good as a dedicated racing shoe, but they seem to be a good compromise and should work well on the street too. Mine are a blue/grey suede version.

It should be in the casting like this.

I sold that Birkin back in 2015, but I think it would be your typical radiator cap that was used on an older Ford. Something like a Gates 31523 or equivalent ,as used on a mid-80's Mustang should work.

Looks good!

@Chris pike - I sent you a PM.

I wanted to update my previous post after a test drive with my son's SnoPro trailer. First thing I noticed is the shorter door makes it a little more difficult to load so some race ramps are definitely helpful, and would be essential for a car like the Lola. Total weight of trailer and Caterham is in the #2600 range, and adding spare wheels/tools/cooler/etc for a track day will still be comfortably under #3000. It was the first time I had towed with a covered trailer and it was a little weird not being able to see the car on the trailer. I think I would get a camera to monitor the car inside as @Vovchandr suggested in a previous post. As far as towing, it went really well. This trailer is about #550 heavier than my open Mission trailer so I did notice the weight difference but it really wasn't too bad. I didn't spend much time at highway speeds, but again it seemed to pull the trailer without issue. Braking seemed to be the same as my open trailer, I'm assuming that both axles have brakes but I didn't verify that. My Ridgeline has a #5000 towing capacity and keeping it in the #2500-3000 really makes for relatively stress-free towing. As we get more experience with this setup I'll give updates with any negatives (or positives) that we haven't experienced as of yet.

I use a Wix 51348XP on my Sigma-powered 310.

From last weekend at Club Motorsports in NH.