I’m looking for recommendations to improve my car builds.
Generally what I do on every car is start from the right to the left, AWD Swap, install the Centrifugal Supercharger, Forza Front and Rear Aero, Race Tires Compound, Front Tire Width I keep stock and Rear Tire Width I put at max, Put in the Race Transmission, Race Differential, Race Suspension, Race Anti-Roll Bars Front and Back, Race Weight Reduction and after that try different combinations to max my power in that PI class where my car is at at that moment.
But I’m doubting a lot when and/or if I need to put on Aero? Is this depending on Class, Power, etc.?
Upgrading the Tire Size, which I leave stock on every car, but is this the best?
How to choose the best engine, what do I look for?
What is the best order of engine upgrades to install?
I’m hoping people on here can help me improve my builds, because I think there is still room for improvement, for example yesterday I tried building the Acura Integra Type-R but for some reason the back end kept sliding out no matter what I did, Aero settings didn’t help and there was something with the engine when accelarating from stand still.
Just from what i’ve read, it does not sound like you changed much in the tune. Aero isn’t everything for the car, but the suspension is. If your car’s suspension isn’t tuned, then the car itself can handle in any number of ways. My first suggestion would be to check out my tuning calculator and even out your car. That will help out with unnecessary body roll on your car. Do a few laps, 2-3 on your favorite area or just drive it around before adjusting the rear stiffness as my calculator will give you a range of 50-75%. Once this is done, you can make other necessary changes from there. You can start changing gears, you can change the power ratio in the differential (40/60 is usually the default). You should not need to change aero too much at all, unless you are into serious tuning. Also, if you are more than doubling the power in a car over it’s stock, I would suggest at least changing to sport tires to give it a chance to actually apply the power to the road.
Thank you for the response Senistr, I actually do tune after upgrading by putting it through ForzaTune 7 and usually it gives me good results, just wondering what I should do differently in my building process if any, to improve my built. I’ve developed my build process by watching and reading many posts and videos, but just wondered if I could improve with recommendations. Oh and I actually do upgrade my tires to the Race ones as I mentioned, I was more wondering if the Sizes matter much, since I always keep those stock, like the Rim Sizes when I was talking about the tires.
Aero has more benefits for faster cars than slow ones, so I’d say for B-Class and below aero isn’t necessary. As for tires, I like to upgrade the tire thickness in the front first, then base the rear tire thickness on the front, and from there I choose tire compound. For example, if I’m building a car for A-class and the maximum front tires I can get are 245, then I’ll probably shoot for 255 or 265 in the rear and use sport or race tires.
On the topic of engine swaps, always pay attention to the torque, weight, and weight distribution when swapping an engine. When I hear a racing V12 in an Aventador, it makes me cringe a bit since the racing V12 has a good amount of power, but it doesn’t have a lot of torque. As for the weight of the engine, a lighter engine in a front-engined car can bring the car closer to a 50-50 weight distribution.
As for the order of engine upgrades to install, it depends on how much power and torque the engine already has. If possible, keep the engine NA to keep weight down. If the motor has a good amount of torque compared to horsepower (e.x 425 torque, 425 horsepower) then camshaft upgrades are fine, but if the engine doesn’t have a lot of torque (e.x. 200 torque, 300 horsepower) then I would avoid camshaft upgrades. Whenever forced induction is needed, if it’s an option, use positive-displacement superchargers. No lag is present in these, so it shouldn’t make the car too hard to drive.
Just my 2 cents, but it’s totally random.
One car gets the most power at a PI by upgrading camshafts, another will benefit more from engine displacement.
From what I’ve seen, it seems more likely for a torquey engine to benefit from camshafts and higher rpm, and high rpm engines seem more likely to benefit from displacement upgrades.
But that’s still only a generalised rule.
Aero can be helpful, but it depends on your build and PI. If your car already handles well, skipping aero isn’t a bad idea, especially if you’re at S1 900pi or lower.
Build it for as much power as you can, and tune it with race springs/anti-roll bars to handle at 10/10ths of it’s potential everywhere.
RWDs are best with the weight as far back as possible. FWDs are best with the weight as far forward as possible.
FWD and RWD benefit more from aero.
S2 class almost always needs aero, race brakes, and race transmission (the holeshot can make or break your race online).
If you haven’t swapped the drivetrain, keep the stock clutch and use manual with clutch difficulty for faster shifts.
Sport transmissions often reduce PI from stock. Many cars in A and S1 are better off with the sport transmission and more power filling the PI.