I have some questions about your fiesta experience. How does this platform compare to other cars on the track? Is it true that consumables are cheaper with light cars? Will you invest in weight reduction I saw a post about a guy that builds his fiesta under a ton?
https://www.pistonheads.com/gassing/topic.asp?h=0&f=47&t=1810672
There are a lot of variables and your question is difficult to answer with one opinion. A stock Fiesta ST is more fun than a stock Honda Fit in my opinion. A stock Fiesta ST is inferior to a stock CTR or GTI (in my opinion).
A modded Fiesta ST (Wavetrac LSD, decent coilovers with linear springs, chassis bracing, larger radiator, larger intercooler and hybrid or s280 turbo on e30) is much better on track than the other two vehicles I mentioned.
Regarding consumables, lighter cars are less expensive. I won’t remove any additional weight from my car because I appreciate the comfort of the mostly complete interior. I actually love my sunroof too. Wheels and tires however, must be light to go fast. Wheels are consumables and can be expensive. Tires cost more than anything else.
The Fiesta St is cheap compared most everything including Miata’s and old Civics. Tire size is limited to 215 so almost all of them are inexpensive when compared to any other track car. With the addition of a LSD, brake pads will last significantly longer since TVC won’t be as active. A BBK might not be required if a Wavetrac or clutch diff is installed. Brake pads and fluid still need to be upgraded but that’s the same for just about every car.
In my opinion, the Fiesta ST is the best FWD track platform in the USA but most people lean towards the GTI and CTR for their comfort and status. There’s no track status to be gained with a Fiesta ST. Trust me. My car humiliates egotistical guys regularly. 😂 I think it’s possible to build a Fiesta ST that would break FWD track records because of its agility, ease of rotation and light weight. It just takes money to build proper aero and its supporting mods like, suspension, high HP engines and robust transmissions.