Truenotch

Torana / Carina. Same thing.

@Roman can you run a bigger air filter on an angle to get more filter area? If you lean your filter almost flat, you could almost get a square filter in that's the same width as your mock up. Green Brothers Racing do it this way, but I can't find a photo of the inside of their air boxes... So here's an example of how the herb growers do it while they're saving up to pay for a Green Brothers 13BPP and sequential:

"Old lady flap clatter" is the true meaning of Vintage Grumble. Yeah, for sure. Coronet Peak is quite steep and has some tight hairpins, so it's one of the few that really favours high horsepower 4wd cars. They can point and shoot through a lot of corners and don't need to deal with carrying momentum in technical sections like other hillclimbs. The smaller cars still punch above their weight though. Here's the results from November. I was 15th out of 37 cars and there's only one 2L car ahead of me (he and I were meant to be class B, but there was an admin mishap).

Finally coming back to this with a few more photos from the Coronet Peak Hillclimb. It's one of the older hillclimbs in NZ and has been running since the 1970s up the ski field road about 20 mins from central Queenstown. The race is up the last ~2.5km of road from just above the Skippers Canyon road to the ski field car park. A few of us took our cars to town on Friday for a display on the waterfront. My car made the (old) ladies go crazy: One thing about this hillclimb is how epic the photos look.... The backdrop is stunning and it makes everything look amazing: The other cool aspect is that you can spectate as a driver since it's split into two groups. I'd pick a park on the way back down the hill and would watch the other group of cars run past, then head back to the pits after their run... It's pretty amazing being able to compete and spectate on the same day. Just a normal car parked in the gravel: The car went well all day. I didn't set the world on fire for times, but got respectable results and had a fun day on the hill. It's booked again for November 2025 and I'm dead keen to get back up there. Here's a couple of videos from the day:

@Roman here's the Jenvey setup ready to test. It uses the intermediate plate and isolator section from the factory manifold with an SLS or MJF printed carbon/nylon manifold to the Jenveys: Connor printed a stainless 4-1 collector and it's so sweet:

Absolutely. Andre is keen to give it a fettle and I really want to learn how to tune the car myself. I have a set of Jenvey throttles to test and see if the blacktop throttles are restrictive... And two engines to put together for other tests before the end of winter.... And a loom to build.

Not for a while. I'm planning to do some upgrades and repairs over winter and be ready for a good spring/summer/autumn of motorsport next season.

............ Ahem...... But you might be onto something. Install a spring that holds the bonnet up like a factory bonnet catch and have a little car alarm switch going to MoTeC C127 dash that solely exists to give me a "BONNET PINS" alert.

You're three one showing off your pipe to everyone 😄

Makes sense tbh. This project makes my flaps clatter.

Sounds great, if you have a crew. My race days mostly consist of me being there on my own, talking to far too many people in the pits, followed by realising my car needs fuel before the next race and frantically throwing 10L into it and whipping my helmet on to head out. Check lists will not be used with enough discipline to make them useful (maybe they'll be used if I decide to do a full season of racing rather than just fun club days).

I'm just going to run with a "if it looks installed, it is installed" rule for everything from now on. If the bonnet goes down, the pins go in, no matter if it's sitting in the garage or at the racetrack. Haha, I had the same thought about backing plate swarf possibly killing the engine and was pretty careful while I made the plate to make sure that didn't happen. The sparkly fibreglass dust that filled my engine bay while dragging my bumper around Highlands is the real motivation for installing this.

For anyone who's been following this build for a while: today is a big day! .... I finally got around to installing an air filter 😅 This has been on my to do list since at least 2012 and people always ask why it doesn't have a filter or when it'll get one. Well, today is (finally) the day. I even drilled the holes accurately the first time! Such a shame this one bit of blue won't be visible anymore 😂 ... and yes, I holesawed big holes but didn’t take a photo. I've been battling with these repairs a bit too. Got mixed up and used the wrong type of polyester resin last weekend and it didn't set, so I had to peel that back out and go again. These repairs on the bonnet went well though. *the bonnet repairs are from a separate incident that happened at that last race meeting that I'd prefer not to talk about...

Flights booked. Let's see how hungover I can be for racing on Sunday.

It's been a BJJ gym since 2022.

Good progress! The CR-S looks like it'll be better than the AR-1 in the wet too (not hard 😄). I wouldn't mind trying a set for DOTs if my AR-1s ever wear out.

That one's a FWD Civic (link), so I don't know why the duct starts so far back. The Evo I can't find had ducts starting from under the front seats.

Not the car I was thinking of, but interesting nonetheless:

I can't find a photo, but there's an old time attack Evo (?) that had huge ducts running from the middle of the underfloor out to the back of the car between the tail lights. Apparently it worked, but you dont see anyone doing it these days. Just like you won't see me running side skirts (for a while, at least).

Oh yeah, it'll definitely be two beautifully made dry carbon ducts from the cooler to the exit. Kyle (kyle.engineers on youtube). He's the host of the aero course too. I think it would make loads of sense for your car, but it looks like a lot of work to fab the dual radiators and all the ducting.

More figuring out while I wait for my repairs to cure, no exciting action yet... In these pics, the splitter is roughly placed ~85mm from the ground, which is close to the minimum allowable under MSNZ rules at my current ride height (bottom of wheel rim is the minimum ~80mm). It's currently about 10mm lower than the old lip was (the sheet slots straight under that bumper... it would have worked perfectly 🥲 R.I.P). It needs a notch for the sump so I can slot it right back to where it needs to be. It'll need to be able to move up and down a bit so I can adjust the pitch. 1° over the length of the blade is about 14mm of fall. and it looks like the tunnel location should work out well. A 6" straight tunnel will send most of the air inboard of the wheel. I could possibly go wider with the tunnel, but I think basic straight tunnels will be plenty for a first test.

I guess with the 155 is the engine was too far forward to have an effective exit duct? It's such a cool and weird car with a bunch of compromises for the 4wd system. *Edit - After a google image search, no cars in dtm had bonnet vents until 2012. There must have been a rule change, because they've all had bonnet vents of some sort since then.

Just riffing through splitter ideas at the moment. I'm thinking about forming some small tunnels here. It would be fun to test them (I can block them off for a session to see if they work). I think ~50mm of poke out the front will be about right: This material is a polyurethane foam ACM. It's 10mm thick and super rigid I'm planning to double stack it for extra strength (glue two sheets together with panel bond). I have a few other ideas on how to make this work better... I'll update on those ideas if they work out 😄

I'm not so sure about this. BTCC were heavily restricted with their aero and the cars weren't allowed extra vents. If they were allowed, you can almost bet they'd be venting out the top. Look at less restricted classes to see how they do it. LMP1/Hypercar, FIA GT3, Porsche cup, TCR and Time Attack all vent out the top. You can't tell me they wouldn't be venting all their air out the sides of the bumper if it was an advantage. They're also really hot looking vents tbh. Also FYI, chat GPT doesn't know the truth (yet).

Got sticky repairing the lower corners of the URAS bumper last night. After scheming different ways to do it, I ended up going the simple way and threw masking tape on from the outside to get the shape, then covered that with packing tape for structural integrity. Couple of layers of glass from the inside and some patches on my flares where the screw holes blew out: And it looked like this when I peeled the tape this morning: There's a couple of dry spots in the glass (access to that corner was tight), but it's good enough to clean up and get it looking straight. We have another AE86 project at work at the mo, so we'll get this bumper straight enough to take a mould off.