The only guide you need for all that is Pocket Circuit in Lad: Gaiden
Tips for beginners and full builds for everyone that is struggling.
If you find builds that outperform mine, list them below in the comments and I will edit them in (while also crediting you).
- DONT MASH MINDLESSLY WHEN CAR FLIES OFF THE TRACK
You can save your gauge by stopping mashing when the car is safely on track
- SOME RACES CAN BE SAVED BY THE BOOST
I know it looks scary to press that button, but it is actually really useful to boost from time to time. Figure out a place to boost safely (no ramps or curved roads) and zoom away! Also you can boost on loops to bypass them faster (probably the best use of your boost)
- TIRES ARE IMPORTANT
If something is not working – switch out your tires. They are by far the most gamechanging thing in this game
- STATS ARE USELESS
It really looks like the numbers and graphs are VERY misleading, so spend more time thinking about the parts themselves and their use, and less on looking at numbers
Where to find parts?
Instead of whaling the best parts to destroy some kids for billion yen, all of the parts are available in the shop near to the new Pocket Circuit Fighter for points you gain while winning.
There are some parts you can get by other ways, most of them are decals and car models, which give you no value outside of the coolness factor. You can obtain them in the Akame shop, after upgrading it a bunch and in the gambling den in the Castle.
One part is hidden on the roof near the Grand Cabaret Club in the North-East part of the map, you can grab it with your Spider Gadget.
If you lack some parts I use, just try the previous version (super instead of ultra etc)
Regular Race Builds
BOOST REQUIRED (right at the end)
BOOST TWICE ON LOOPS (you go on the loop 3 times, boost on the latter 2)
Boost at the end