I have finally finished. I am quite happy with how it turned out however there were some minor stepbacks along the way. At first, I called this a Pagani Zonda C12 but then I realized that literally, every single Pagani is custom made and there isn't really a standard Pagani Zonda so this is my version of a Pagani Zonda. Overall the car features:
5+r speed manual gearbox with safe shift mechanism from @Gray Gear and slightly modified gearbox from @Leviathan
Ackerman steering geometry
Working steering wheel and Hand Of God steering
full independent suspension
opening rear Clamshell
opening front Bonnet/hood
Gear Ratios are as follows:
The Gearbox was quite a challenge because at first, I had planned on doing a 6-speed gearbox in the central column, I quickly realized that that was waaay too wide for a 1:10 scale car. I also found out that older models of the Zonda were built with 5-speed gearboxes and I wanted the car to be as realistic as possible and that was by making a 5+r gearbox. I stumbled upon Gray Gears shifting mechanism for a 6-speed transmission and safe shift mechanism which was a lot slimmer and allowed me to put the gearbox under the engine which saved tons of space. The shifting linkage for 2nd and 3rd gear or the white parts below really proved quite a challenge because I had routed the drive axle from the differential to the bottom of the car, of course, the only way to move the "middle" clutch is by having a lever under it. this meant that the middle shifting lever was already below the entire car and it still needed to be supported underneath so it wouldn't fall out. my solution was to attach an axle which the middle lever slides upon. the orange ball in the below pic shows where the axle connects with the rest of the chassis. to my surprise, this solution is sturdy and hasn't failed once. It also only lessens the suspension travel by one stud. The safe shift mechanism sticks out a bit but it keeps the "driver" from accidentally engaging more than one gear. It also allowed the clutches to use the non-ribbed connectors. The ribbed connectors made it too hard to shift gears due to the extra force needed to "snap" the clutch piece into the desired position. This also means that while "driving" it is recommended to keep your hand on the gear lever otherwise the car could slip out of gear. Here is a picture of the gearbox and linkages for shifting gears.
Green is the safe shift mechanism. red controls gears 4 and 5. White controls gears 2 and 3. Blue controls gears 1 and reverse.
Like the real car, I decided to build my Zonda in separate stages or better known as modular building. just like all Lego instructions, I tried to build back to front starting with the rear axle then the central column and gearbox and lastly the front axle. Most supercars and hypercars the Zonda included are built starting with the monocoque but at the start of the build, I didn't know that so my modular chassis does not really have a monocoque. Each section comes together very nicely requiring only a few pins. I tried to build the bodywork modularly as well but that just wasn't really working. the bodywork though is very sturdy though and altogether you can pick the car up by the roof or the back or the front.
Similar to the real car, at least what I think, the steering wheel lock to lock is about 3 turns. Due to complications in space, I extended the wheel hub to give the car steering in which the inner wheel turns more than the outer wheel. I didn't do the triangle thing to see if it actually met the specifics of Ackerman steering geometry but it's close enough you get the idea.
here is a before and after pic of what I mean
The Real Zonda does not feature a frunk but yet for some reason unknown to me Pagani made the car have an opening bonnet/hood. And of course, it has a rear clamshell which reveals the v12 along with some storage compartments on the side. I decided not to include those side storage compartments because they ended up being too small and as a result looked really stupid when the clamshell was open. Anyways here are some more photos most of these pics are a 3d model of the car because some people don't seem to like multicolored cars. I do plan on eventually buying pieces in the correct color so that I can have a non-multicolored car but right now buying pieces from Lego is really slow, probably because of the pandemic. But I kinda like the 3d model though because it doesn't look super fake and you can also have pieces in chrome whereas you would have to go through a 3rd party to get chrome pieces. Let me know what you think. Also, how do you change your profile pic?