Honda has a new car for the 2018 British Touring Car Championship; we lift the lid on its engineering secrets

Fun fact: remember the British Touring Car Championship (BTCC) Honda Civics you were watching last year? They were built in 2012.

Okay, maybe it’s not that much fun, but it’s definitely a fact. Seriously, the five cars driven by Matt Neal and ‘Flash’ Gordon Shedden, plus three other Honda-supported cars, were all in their sixth season of racing.

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Some smart alec is going to tell me I’m wrong. The Civics used in the BTCC were hatchbacks from 2012, but estates in 2014 and Type Rs from 2015, they’ll say, head in notebook. And they’d be right.

But here comes James Rodgers, team manager at Honda Yuasa Racing, which is run by the Neal family’s Team Dynamics outfit, Honda’s supported race team. “We made seven shells in 2012,” he says. “In 2014, the intrinsic shells were cut-and-shut to put the Tourer back end on them, and then ‘un-cut-and-shut’ afterwards. But from the B-pillar forwards they were the same, and the roll-cage remained the same. They’re massively strong cars – I think we lost one shell in five years. We’re not in a day and age where we can build new shells every year.”

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This year, though, they can, and this is how they do it.

The 2018 BTCC gets under way at Brands Hatch on Saturday and on the grid will be all-new Honda Civics – faster than last year’s car, they’re confident – based on the latest-generation (FK8) road car.

Five champions, 17 race winners on the 2018 BTCC grid

It’ll be faster because the new road car is faster, although I’ll come to why in a moment. Because, first, it’s worth bearing in mind that the BTCC’s rule-makers will try to limit whatever advantage a new car brings.

The BTCC runs to what they call New Generation Touring Car (NGTC) rules, aimed at equalising the field as much as possible. The rules state that you have to use a common front subframe, a common rear subframe and an FIA-approved roll-cage to a common design, although you can modify it to fit. There are other common parts, too, such as the brakes, transmission, turbo and intercooler, while even parts that are more open to interpretation are still very tightly controlled.

Some parts, after homologation by the regulators, are available for any of your rivals to see. And if it looks like you’ve gained a notable advantage then, well, there are technical committees and engine committees who might limit your turbocharger’s boost. And if you’re still winning after all of that, then there’s success ballast – applied and removed on a race-to-race basis – to slow you back down again. The only time you’ll actually see the latent, honest pace of a top BTCC car in a season is probably in the build-up to the first race.

Sounds harsh, doesn’t it? But this stuff works. The BTCC has run itself so successfully – and it’s mostly representatives from the teams who make the decisions – that it’s the most-watched British motorsport series going. Crowds average 40,000 and there’s live TV, the entry list is maxed out at 32 cars and sometimes qualifying grids are separated by less than a second from front to back.

And crucial, says Rodgers, is that “they look like road cars. As you know, they’re actually very far detached, but on the circuit they look [similar].”

They even start off as road cars. A new bodyshell rocks up at Team Dynamics HQ – an immaculate building in Droitwich – from where it’s sent off to be dipped. It’s not acid dipping like the old mega-money Super Touring days of the 1990s, where the car comes back so thin you could scrunch it up like a fuel receipt, but it gets rid of the galvanic coating. Then fabrication work on the cage begins. It has already been designed in-house because Team Dynamics gets CAD body data from Honda, and it has been FEA (finite element analysis) tested and approved by boffins at Autocar’s old friends’ place, MIRA proving ground.

If you’ve got some machines and you’ve got proficient welders – and, boy, does Team Dynamics have proficient welders – you can make anything. Even an estate from a hatchback and back again.

Suppliers help the situation, too. Team Dynamics is a technical partner with a lot of component makers, so that's why it doesn’t pay for spark plugs that would cost £1800 a set otherwise, why its own damper and spring experts can advise Bilstein and Eibach precisely what they’d like to run and why this tech will one day make it into road cars. But this BTCC Civic is, they reckon, going to be so fast, because the Civic road car was born with a Type R model in mind in the first place.

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This isn’t PR puff. The latest-generation Civic has its fuel tank in a sensible place – by the rear seats – whereas the previous car had it underneath the front seats. For the race car, it was redeployed somewhere that would be safer in a crash anyway, but what it also meant was that the car’s floor wasn’t completely flat.

Today, it is flatter for longer, nothing protrudes beneath it, not even the race car’s exhaust – this gives aerodynamic advantages. And do you remember us reporting, at the Type R’s launch, that Honda’s engineers said that all of the scoops and skirts and addenda were there for an aerodynamic reason? And thinking that you’d hope so too, because if they were there for aesthetics, somebody got it badly wrong? Well, that transfers to the racing car. Granted, the wings are extended to fit the race car’s wider tracks, but the bonnet scoop increases plenum pressure, the fins on the rear spoiler smooth the airflow and prevent turbulence, which causes drag. Most body parts are remoulded in a relatively light but hard-wearing material, but the rear bumper, and its diffuser, is actually off the road car. So, too, is the upper dashboard, as dictated by the regulations.

The key to the BTCC’s success is the thing that can so frustrate engineers: they want to be pushing technical boundaries to create big advantages, but they’re hampered by technical regulations that prevent them from doing it. Here they get a gimme: a road car that’s so quick that the race car will benefit from being derived, however thinly, from it. They say motor racing improves road cars. Sometimes it does but, in a series like this, it’s the other way round too.

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CIVIC VIRTUES

Instrument panel

Matt Neal specified these buttons. They look a bit playschool, but it means you can find the right one even when you’re flat in top gear.

Brakes

Brakes are control items from AP Racing, but still teams seek an advantage. Honda’s drivers bed in their own (not all teams ask their main drivers to). At Thruxton, they might make one set last a weekend; at Oulton Park, they’ll change pads after every track session.

Front subframe

The front subframe may be controlled by the regulations, but the suspension pick-up points, welded on by teams, are not. Which is why Honda and Team Dynamics would rather we didn’t photograph their location on the new car.

Exhaust

This wasn’t quite finished when we saw the car but it will poke naked straight out of the side like this. Which is why race cars are loud.

Type R badge

The badge is situated in the opposite side of the road car’s grille, because the air intake is on the right on the race car.

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Comments
3

7 April 2018

I know some of the BTCC rules seem a bit frustrating and contrived but the racing is genuinely exciting - you would have though dreary old F1 would learn something from BTCC.

 

Good luck in 2018 Honda!

Steam cars are due a revival.

7 April 2018

The work that goes under the skin is truly impressive. But the finished car looks so much better not plastered in adverts. It's particularly unfortunate to have the big Halfords ad. Given a car with bad taste tacky add ons is usually referred to as having crashed into a Halfords store. Ah well, it pays for the racing.

7 April 2018

This is really an impressive version. Honda always comes up with special features, and I loved this one as well. I like some off-road versions to make an adventure trip. I think most of the production from Honda are not meant for off-road. But, they are officially good.

 

Reece

Essays Author

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Our Verdict

Honda Civic Type R

Honda’s hottest hatch yet is quick on a track but just how well rounded is the new Civic Type R?

Find an Autocar car review

Driven this week