KnifeySpoony

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...

I don't use my odometer as I don't trust it. I calculated mileage based on what google maps told me the distance was door to door.

Hmm definitely something going on. It starts instantly and idles smoothly. Pulls like a raped ape to redline. Not sure if I should chase the issue or not. Freeway cruising is c. 3000rpm. I always note the mileage after getting to the track and filling up at the pumps at the track. However that after a cold morning drive - my oil runs extremely cold because of the dry sump setup. I see temps < 110F on cold AMs while on the freeway. Keep in mind sender is in the tank, after the cooler. I wonder if the cold/thick oil could be affecting economy as well. Another variable is that I let the car idle for a while in my driveway before leaving, trying to get a little heat in the coolant/oil. Typically I will let it idle for 5-10mins. This may be using a not-insignificant amount of fuel? I will go fill up and see if the drive home from the track (warmer ambient temps, no idling period) used significantly less fuel. Thanks

Not that it's really important, but I've notice that my 420R (with aeroscreen, 5 spd trans, roller barrel intake, stock CC tune) gets terrible gas mileage. It seems I get about 16-17mph on the highway cruising 70-75mph. I guess I expected something on the order of 20-25mpg? Sure, the Cd is bad, but there's still not a ton of frontal area, and it's still just a 2L engine. My supercharged exige got 30mph on the highway. Interestingly though, I get better mileage on track in the 7 by a significant margin over the Exige. Is this typical, or is my car running unusually rich at low RPMs?

I didn't have to bend my brake pedal. I don't think that's a thing on LHD cars. Or at least it's not anymore. LHD and RHD pedal boxes are completely different. I did, however have to modify the grommet that overlies the throttle pedal/cable access. The grommet was interfering with throttle closing.

Good racing!