Dajiban Racing Cup - [ROUND 2]

Dajiban Racing Cup

There’s a racing community in Japan that focuses on racing old vans, the dajibans. It all started with motorcycle racers importing old used Dodge Ram Vans to transport their bikes and tools to the track. One of these racers did a hot lap in his van as a joke, but eventually the joke turned serious and more people started tuning their vans to be faster on the track.

For this challenge you will build a modified van loosely based on these racers.


HOW IT WORKS

These are the relevant stats for this challenge:

RACE PACE

  • Lap times: Your in-game lap will be your fastest possible lap.
  • Sportiness: Higher sportiness will make your laptimes more consistent and closer to your optimal laptime.

MISTAKES AND PENALTIES

  • Drivability: If the car is too hard to drive, it will have a higher chance of crashing.
  • Reliability: To finish first, you must first finish. The lower your reliability the higher the chance to lose time in the pits.

Stats Calculator


THE SEASON

This series is a 3 round championship with 30 minute races.

R1: Automation Test Track - Short Course
R2: Ellisbury Tri-Oval - Short Course
R3: Narnilla - Junior Course

This will be the points system used for every race:


RULES

Rules

Engine:

  • Engine family year: 1970-2003
  • Variant year: 2020.
  • Layout: Any with 6-8 cylinders.
  • Displacement: 3.9-5.9 L
  • Cast iron block only.
  • Must use Push Rod heads
  • Super/Turbocharging is allowed and encouraged.
  • Fuel: Uneaded 95 only.
  • Emissions: Must pass WES9. A three-way cat of any kind is also required
  • Loudness: 60 maximum. A muffler of any kind is required.

Trim:

  • Must use a van body.
  • Wheelbase: 2.75-3.30 m
  • Frontal Area (in the body selector) must be at least 3.0 m²
  • Pannels: No fibre glass or carbon fibre.
  • Chassis: Ladder, HD Ladder or Partial Monocoque.
  • Front engine only.
  • RWD only.
  • Model year: 1970-2003.
  • Trim year: 2020.
  • Rim diameter: 15-16 inches.
  • Tyre profile: 40 minimum.
  • Tyre width: 280 maximum.
  • Tyre compound: Radial Semi Slicks
  • Tyre quality: 0
  • Brakes: No carbon ceramic.
  • Maximum brake fade is 2.5% (any type).
  • Aerodinamics: One single element is allowed. Aero fixtures must be visible and attached to the body. Mirrored fixtures count as one.
  • Race diffuser is banned.
  • Seats: At least 2 full seats on the front row.
  • Any interior and basic AM radio (or better).
  • Safety: Advanced 20s.
  • Camber limit is -3.
  • Toe limit is +/-0.5.
  • Fuel economy: 20L/100km or lower (11.7 US mpg or higher)
  • Maximum cost: $25,000.

General

  • Default techpool (Everything +5).
  • Mimimum quality: -2.
  • Numbers have to be placed on the hood. Number can reserve a single number from 000-999 and 0 is considered a number (for example: 7, 07 and 007 are considered different numbers). Taken numbers
  • The following advanced settings are banned: Wheel width, wheel diameter, thread width, tyre diameter, and camber. Everything else is allowed, but don’t make the car into something it isn’t.
  • I reserve the right to bin cars that follow all the rules but go against the spirit of the challenge.
  • Meme entries will be binned without mercy. Same goes for abusing glitches.

SUBMISSIONS

  • This challenge takes place on the stable version.
  • You need to send me the car file and post an ad for your car on this thread.
  • Model name: DRC - your username
  • Trim name: Car name
  • Family name: DRC - your username
  • Variant name: Engine name
  • Submissions will open on Monday, 13th April at 00:00 CEST.
  • Submissions will close on Sunday, 10th May at 23:59 CEST.
  • You have unlimited resubmissions until the challenge closes.
12 Likes

Close enough, welcome back SMRW!

You have no idea how much I like this idea.

1 Like

If SMRW had a cargo van-based counterpart, this would be it.

1 Like

Is the brake fade rule applied per axle (i.e. what’s displayed in the braking graph) or across the whole car (i.e. what’s applied in the final performance screen)?

Also, are vans with car profiles and heights like Gondola_V, 70s_Large_Cargo_Preview and such legal? Gondola feels like it’s against the spirit of the challenge and likely to get binned - maybe a frontal area or height rule could work to try and enforce the spirit?

More broadly, does the spirit include panel vans? Or just dedicated boxy commercial vehicles?

Per axle.

I don’t want to allow them but I’m still not sure how to ban them. I’ll look into it later today. If anyone has any ideas I’m listening.

I have to check just in case but if it’s classified as a van it should be ok.

Frontal area or height feel like the best way to ban them - I picked those two out by thinking “how can I reduce drag as much as possible?” Not sure where the ideal number is, but you could look through and find something that divides out bodies you don’t want from bodies you do want.

That, or just making it clear what fits the spirit.

I’d say pick a body that looks like a van and not a windowless hearse

2 Likes

Don’t a lot of bodies have a roof height morph? That could potentially have some “car vans” become legal if there’s a frontal area rule.

1 Like

It’d make them legal, but also defeat the whole reason why I wanted to use those two - reducing drag and weight.

1 Like

or perhaps a minimum height limit? if there is height as a staticstic, idk tho i never checked

Maybe just limit the choice of bodies to a certain few? A whitelist wouldn’t be too long since I doubt there are more than 20 body families that include the kind of vans we want, and it would make it less confusing than the frontal area and height stuff.

1 Like

I decided to suggest maybe involving cargo/passenger volume as criteria of what is allowed.

Vehicles not meeting this much cargo space will not be allowed.
Examples of such a thing being mentioned for a van are taken from few relevant rounds in Automation Beam Championship.

Yours truly had completed in 60s/70s round and i made YT video where I’m going through said entry in case somebody wants to look at sparsely designed and engineered van.


Would this be accepted or not really depends on Dani, but I feel it’s a good suggestion.

1 Like

are we restricted to us-style vans or are euro and asian style vans welcome?

I think this is a really cool idea and I will make an entry, but the current setup seems to be favoring V8 engines due to the pushrods, so it’s kind of pointless to run 6 cylinder engines. Pushrod engines scale poorly in high RPM efficiency. The only benefit I see in running a V6 would be weight, but because of pushrod you are forced to run higher displacement anyways thus losing their compact/efficiency advantage. V6 seems like a worse V8 substitute, and the same goes for inline 6. I don’t think anyone would run a boxer 6, but that would be even worse. Can we have something that balances the free torque advantage the V8s get? Maybe a way to get better fueling for the rest?

1 Like

The rules have been updated, here are the changes:

  • Engine block must be cast iron
  • Wheelbase is limited to 2.75-3.30m
  • Frontal area must be at least 3.0 m²
  • Partial Monocoque chassis is also allowed
  • FWD is banned
  • Budget increased to $25k

As long as it fits the rules it will be allowed. I’m sure there must be some V8 swapped VW T4s out there.


It wasn’t intended to be balanced, but yeah I could do something to try and balance them a bit.

3 Likes

Valid. I’ll go with a V8 for now.

The frontal area as showed in the perfomance table of the sumary or the frontal area of the trim body selection?

The frontal area in the body selector.

2 Likes

How do the DNFs work? Does it take you out of one race or for the whole series?

Only one race.