KnifeySpoony

Officially, yes, but previously you could spec a Sadev on a 420R, even though they don't show it on the configurator.

Ping Darren on here (can't remember his username). He runs them on his CSR.

Right, the 420 Race car that's run in the UK championship is really the "cup" car, IMO. This is just a 420R with options that have always been available. The only unique elements that I can see are the central fuel filler, 6 point harness option, and the adjustable bilsteins, and the unique cockpit/tunnel trimmings. I have read about the new extreme compound - it seems to be even softer than the A24 compound based on how they position it. Given that it's technically an "option" for the new Cup model, I wonder if it's Caterham's attempt to fit a cheater tire to a model in order to brag about lap times in their marketing. Similar to Porsche putting the Cup2R on their GT models to boast about Ring laptimes.

https://www.autocar.co.uk/car-review/caterham/seven/first-drives/caterham-seven-420-cup-2022-review

Ha, no. It's only good mileage compared to my last track car. My exige got about 6mpg on track. The 7 is getting closer to 8. So 50% improvement! 5mpg on track is not atypical for many cars. It's all relative...

I did the RBTB from new, so I didn't get to experience the power bump, but it's well-documented. CC promises 10HP, but I think most people seeing ~15-20Hp boost on dyno runs (on a 420 platform). I still need to see what my actually economy is - I think my long idle/warmup is skewing my numbers dramatically. It gets great mileage on track actually (where it spends most of its time).

I would add that on a 420 w/ RBTB, the fueling is excellent. Yes, the throttle spring is strong, and the response is so immediate that it is possible to "kangaroo" as the Brits say. The immediacy is amazing, the sound is phenomenal, and TBH I can't imagine the car without the ITBs at this point. Worth it for the sound alone, IMO.

Yes that's it. The only "downside" of the cap is you lose the warning light for low fluid level. However IMO those things are for camrys that go 30k at time without anyone popping the hood. It's completely unnecessary on a car like a 7 that gets a lot of care and feeding.

I read somewhere to re-torque all hose clamps after the initial heat cycle. On my car, they definitely took some additional tightening. I never had any leaks. Look into the race brake reservoir cap - the standard cap is highly susceptible to leaking, and destroying your paintwork. My clutch also started squeaking early on - A quick spritz of sprayable lithium grease on the pedal linkage solved it.

Try a full face helmet and earplugs. It calms things down dramatically.

I have aeroscreen only, and always wear fullface helmet. I'm 6'1" and even with lowered floors, anything above 50mph is intolerable. My DD is a bike, so I'm used to helmets anyways.

View of switches under grommet

TADTS stands for "they all do that, sir"

1. That idle sounds right - what happens after that? 2. check the dipswitches on your tach - CC seems unable to set them properly 3. TADTS

I cycled the ignition like 5-10 times (can't remember) to get the fuel to prime all the way to the rail. You can actually hear it as it fills. Be careful if you disconnect the line from the rail - if the rail is full, it holds a seemingly endless amount of fuel. Be ready to catch it all....

It's not a Caterham though. It's much heavier, and the motion ratio may be different as well.

I don't see many caterham looking stuff at all. I'd guess it's something else entirely. Also, how can it be a 620R without even a hint of power oversteer? SMH

I have a huge box of leftover parts from my build. Including a short section of braided brake line...

Is it a factory wheel? The factory wheels are 260mm I believe. Mine came pre-drilled as well.

Looks fine. It's just a slightly larger speedhole.

Option 4), enlarge opening, then put in straight six and use the enlarged opening for a 6-1 header.

That suuuuuuucks. I'm curious to hear what CC says. Easy solution is just enlarging the whole more towards the front of the car, but it's gonna look funny and I'd be annoyed to have to live with that solution.

2 things to note re: that dimension. 1: make sure people know It's an SV ( I assume this makes this dimension different than an S3), and 2: you have aero wishbones, which are wider than the tubular wishbones so will reduced that dimension slightly in your car. I'd help you out but I have an S3.

Ok interesting - I have never seen a thermostat on a dry sump'd engine so I assume it just wasn't a thing for some reason. I will do some more research. I haven't done a real heat stress test on the car yet, as it hasn't been very warm on the 7 trackdays I've done in the car, but I assume it will need the cooler for warmer ambient temps.

The last two AM drives, where I noted the mileage were 1 hr drives, so a 10min idle is not insignificant. I will eliminate that variable and calculate again. I have a dry sump, so there is no way to have thermostatic control that I am aware of. My coolant runs 197F rock solid no matter the ambient temp (while on freeway). On AM drives to the track I do block off the nosecone opening in front of the oil cooler (I have the 420R race nosecone). Because I have a pusher fan, I can't block directly on the cooler itself. Even with the blocker in place, I was running 106F while on my way to Laguna in Feb. I assure you, I was much colder...