Guys build your Engines for the car not by themselves in the engine builder, you will have alot more MTBF to play with than you think. My first test car has 4000rpm of usable Powerband after hitting full boost and pulled a 80 second flat on its maiden Airfield Run.
Perhaps Killrob could do a short Youtube video explaining why Torque and Powerband are important and how to setup a basic turbo for the newcomers?
Edit: Der Bayer beat me to it 
-.-
i’m looking forward to this rallye. mir first build is at around 450 hp and does 83.7 seconds on the airfield. 
This is my design, Kinda inspired by a Ford Capri. Doesn’t really look like a rally car, but i may change the design a bit 
He did. Without in-depth turbo explanation, but you should get the idea of a good torque and power curve.
My current BRC 1100 prototype build is powered by a revised version of the 40-valve V8 that powered the '84 Group B, it makes 401HP, the top speed is going to be around 245-250 kph, it’s got 1.23g handling and it can make a lap of the Airfield Track in 82 seconds, my Super 1000 isn’t as good, it makes 128HP, the handling is barely 1.18g, the top speed is 190kph with nearly zero downforce, with ±100kg it drops to 160kph 
My Super 1000 car has 140hp, it is only 10.98 seconds off my 1100 around Stop Deer Test Track, with a little bit of downforce (Had to put in some underbody cladding so it doesn’t produce lift) it makes 1.22g in the corner and it will top out at 204km/h. I still wouldn’t put my money down though, there are amazing people out there who’ll do it even better.
Oh and just so you all know, there are people who already have broken 500hp in the 1100 Class. While the average (with more useful powerband) tends to be at around 430-480hp. It’s the difference between each machine that make this interesting. 
Different people use different way to solve problem and make rally car go faaaaast, it’s not just about the power that matters.
I have kind of an odd problem with one of my cars. It has quite a peaky power band which means that it is as tame as a lion that has just trodden on some lego and that I probably wont use it, but for some reason when I make the individual gears bunch up even slightly closer to the final gear the 0-60 time will go down hugely because the tyres magically lose ~0.2g of acceleration grip during the start. It is not the poor low end power that is limiting the grip as you would have expected because the power line is well above the tyre grip in both cases.
Does anyone have any ideas on how to fix this, because with the gearbox bunched up at the low speeds the acceleration in the high speed is a lot worse than it should be.
Sounds to me like the driver is just smoking the tires massively and letting the power at the end do everything. Aaaaand then at high speed… there was no high speed. I’d suggest running gears that allow you to retain a good acceleration POST-launch.
To give some insight into my car… at least for Revision 38! 
[quote=“OCAdam”]Sounds to me like the driver is just smoking the tires massively and letting the power at the end do everything. Aaaaand then at high speed… there was no high speed. I’d suggest running gears that allow you to retain a good acceleration POST-launch.
[/quote]
That’s really quick! My grannies are almost 2 seconds slower, but happy at it!
That was actually the first run I did with the car on that track. I’ve been tuning based upon combined time around the BRC shakedown stages, BRC S1, Nurb Nords, and additionally my Road Atlanta (but I also have a combo time without RA). That revision did the 5 combined in 2052.85 seconds… or 34 minutes, 12.85 seconds. With RA, it’s an additional 101.01 seconds.
Good thing this is not an endurance event. my car currently has around 27L/100km or 10 Miles per Gallon.
Is there a way to work out what the downforce balance is by digging in the lua file? its really annoying not knowing if the car has balanced downforce
My latest try, kinda nice the 2.8 sec 0-100, not alot of downforce though.
Dosent look that much like a rally car 
That will be added in the next bigger update, where you get info for the individual downforce front/rear at 200 km/h.
You can find the lift values for the car body you are using in the model lua on lines 158 and 166, which tells you about their intrinsic balance. The actual values with all wings & splitters in effect you find on lines 1669 and 1671.
Finally cracked the 80second mark
Edit: shit, didn’t see the 6 gear requirement. Back to the drawing board 
[quote=“Killrob”]
That will be added in the next bigger update, where you get info for the individual downforce front/rear at 200 km/h.
You can find the lift values for the car body you are using in the model lua on lines 158 and 166, which tells you about their intrinsic balance. The actual values with all wings & splitters in effect you find on lines 1669 and 1671.[/quote]
Is it the l_f and l_r values? they are on slightly different lines for me, hence asking.
Also, its good to know that my current car isn’t 100bhp behind the top runners this time 
[quote=“Reaper392”]Is it the l_f and l_r values? they are on slightly different lines for me, hence asking.
Also, its good to know that my current car isn’t 100bhp behind the top runners this time [/quote]
Yes indeed!
No, they basically are values for the weight distribution. l_f is the distance from the center of gravity to the front axle, l_r is the distance from the center of gravity to the rear axle.
The line numbers might be a bit different between models with and without turbochargers.
If you search for ClFront and ClRear, you get the base lift distribution for the body (at least I think it’s only for the base body). I couldn’t find the actual downforce/lift values at 200 km/h though.
