jb70

For those who are interested, there is a complete LXF available of the original 42083 set by eurobricks member @Migui94: Official lego sets made in ldd

Yes, the pimp-up-my-bugatti project is in work, and it makes a lot of fun ! Thank to all your contributions we are making good progress, but I am still not satisfied with these points, I would like to improve: The doors are wiggling, they need better guidance and may be a door lock The rear suspension is still "sagging" compared to the optimized front suspension from @Didumos69, maybe it just helps to replace all friction pins to non friction, but we have to try. So does anyone have some ideas to improve these features? The gear indicator may look better with a thin 1x2 liftarm, but to be used as a switch the thick liftarm is more handy.

@m3eu, Thankx for your offer. But the rebrickable database will do this work for us automatically, once I have the complete digital build of my MOD.

@m3eu, You will need additional parts to build the gearbox MOD. So it can't be build only from the parts of the original box. Today I can't tell you what kind of additional parts you would need. You may count by yourself or wait a few weeks. Once I have a complete digital MOD, it will be posted on rebrickable. But this will need some work and some weeks...

Well, indeed I tried both configurations 20-12 and 16-16. Both are running very well with less friction. So you may upgear the Bugatti with 20-12, if you like. I compared it to the Pimp-up-my-Porsche (and I guess, it was upgeared, too, after implementing your gearbox optimization). With 16-16 the Bugatti runs about twice the distance of the Porsche with the same revolutions of the engine (both in 1st gear or in max gear). And now it get's academic : For max gear that may be realistic, because the Bugatti should reach 420 km/h at 6000 rpm, compared to the Porsche with 310 km/h at 8.200 rpm. But I personally will keep the upgeared version with 20-12. It runs fluently in each gear, is comparable with the Porsche and reduces the lag between forward an backwards.

@Didumos69, Great Work again! I have build and tested your front suspension MOD. It works perfectly, when built into the complete car. There is no more lag! And the suspension is stiff enough with 6L suspension arms. It should even carry some extra weight from additional MODs. It only needed one minor change to fit into the car: The blue 3L pins that hold the 4 gray 3x5 liftarms, need to be moved to the outside to open a hole for later building steps. And I found a solution for a better rigidity of these liftarms. This way they fit to the 15L beam which will later be added on top. This adds more rigidity to the liftarms and the complete front axle. LXF-file here.

@ttoobbyy, great idea to transfer the gear indicator to the side of the passenger seat. There is pretty much space left to add some gears. And also you found a perfect place for the gear indicator through the hole of the panel in the windcreen. This is my MOD of your idea: I think it looks pretty well and does not disturb the beauty of the car. And it looks nice next to my HOG steering wheel. And the clou is: This is not only a gear indicator It also works perfectly as a HOG gear switch, so it is no longer a pain to reach those paddles beneath the steering wheel. The HOG gear switch rotates about 240° to switch through all the 8 gears It is easy to operate with less power and clearly rests in each gear position

You like to pimp up your Bugatti with this new gearbox? Here are the building instructions: Chassis+Gearbox.pdf And a 3D-model as LDR: Chassis+Gearbox.ldr

Yes, the sequence is perfect now: 1-8 with block on both ends. There is a noticable change in speed between each of the gears. The gearbox works fluently and has less friction as the original one. And I think the overall design of our new gearbox looks much cleaner the the original one. I found a solution to support the 16t gear by adding a 9L beam at the rear side, which fits well into the chassis:

Very good work, @Didumos69! But, unfortunatly there is again a collision: The 24t gear collides with the bottom of the chassis. In the original solution from TLG the 24t gear was mounted two studs further to the back. There is a hole in the chassis, so the 24t gear may run without collision. So I did the same with your solution: moving back the 24t gear while keeping all the gear sequences as you suggested: More Pics here: https://bricksafe.com/pages/jb70/42083-pimp-up-my-bugatti/pics/gearbox-v2 I think we now come close to a perfect MOD of the gearbox!

Replacing 2 knob gears by 3 8t gears would also help to get the right sequence 1-8. It's more difficult to align, but it works: By the way: There is a nice place to attach an M-motor at the back of the diff to test the gearbox. You only need to replace the blue 20t gear by a normal one.

@Didumos69, i tested the gear sequence in my MOD today. My sequence is 5-8, 1-4. So switching the blocking mechanism from back to front did not have any effect on the sequence as I supposed first. Now we need to find a solution to reverse the high/low gearbox without having a 20t gear on top or to reverse the 1-4 gearbox. What do you think?

@Didumos69 I have build your gearbox solution and it really works great!!! To make it fit into the Bugatti, I needed to made some changes: adjusted the gearbox housing I moved the blocking switch to the front, because it had a collision with the engine mounted later This made it possible to reverse the hi/low geartrain again (as in your first choice). Good luck, because having the 20T gears on top also collided with the engine. Having the 12T gear on top is OK. I turned the geartrain with the two 8T gears from horizontal to vertical, because otherwise the 16T gear had a collision with the engine I will post a ldr file in the next days... Here are some more fotos: https://bricksafe.com/pages/jb70/42083-pimp-up-my-bugatti/pics/gearbox#

This is a first try on the doors. A very simple door locking mechanism using only 5 additional parts per door. Not perfect yet, but better than the sloppy doors in the original one, where the doors don't have a fixed position when closed.

@Kumbbl Yes, I really plan to do a pimp-package. But don‘t worry, this will take some time... And I am really looking forward to all ideas from this community! In the next days I will try to understand, build and test @Didumos69 gearbox solution. I think, blocking the round-trip-gear-change is also a must-have to pimp up the bugatti and reducing friction in gearbox is always welcome. Thankx to Didumos in advance for this great work!

@Bulga By saying „compatible“ i meant that you may add @DayWalker´s reverse gear blocker without interfering or loosing any others features of the pimp-up-my-porsche solution. But you need to make some modifications to get it in. Just compare the pictures of the reverse gear blocker with the corresponding building steps in my instructions and you may see the differences. Sorry, but we don‘t have step-by-step building instructions for this combination.

I did my first MOD on the HOG steering. It is easy to operate, includes a turning steering wheel, only needs a few parts and fits nicely to the design of the car. For me a must-have to be able to move the car.

I just finished building my Bugatti. And I must say, I really enjoyed it. What a great building experience. I recommend to listen to the podcasts, while building your Bugatti. This car is a technic monster in real life and as well in Lego. It is very dense packed with technic features and combined with perfect design. IMHO one of the best Lego sets ever. Gearbox and engine now run smoothly after correcting a building mistake, I did. Please be sure, the white clutch gear runs free, before doing the marriage of the front and back. Mine was sqeezed between the beams and caused to much friction. The front suspension works OK, is not lagging much more than the back, but it could have some more ground clearance. I am missing a HOG steering, but this can be modded. So let´s start to pimp up this Bugatti! So, I can fully recommend to buy and build this set. I think, it is worth the price.

I think, I solved the puzzle! Thank to @Didumos69 who triggered me several times to include his paddle shifter into my Pimp-up-my-porsche. When I played again with my Porsche, I noticed, that the old paddle shifters often stucked when they returned to idle position. So I was looking for an improvement. Didumos used blue 1/2 pins to guide the yellow knob gears in exactly the right position for a smooth movement during shifting. This is the main difference between his and the original design. And it is much better than the original one. I combined Didumos' geometry while keeping most of the original design (and parts) and the easy-to-mount rubber bands on top. This is the result: I have updated my instructions and mpd file of Pimp-up-my-porsche on rebrickable.

Hi Didumos, i have build your improved paddle shifter. Indeed it shifts more smoothly than the original one. But i thought, the mounting of the rubber bands inside the shifting unit is very complex to handle. If the rubber bands slip off once, you need to rebuild the complete shifting unit. That's why I decided to keep the original paddle shifter. But, if we could combine your improved paddle shifter with upside rubber bands, that could make the deal. I think to remember, you have posted some thoughts in this direction. Do you have some examples like photos or ldd, mpd?

These MOCs are not the same. Both of them are based on MOC - 42056 Porsche 911 GT3 RS Unofficial Errata, but added with additional improvements. Look at each other's descriptions to see the difference and choose your favor.

Which MOC from didumos do you mean? - I have listed all the changes, I included in my MOC, in the description of Pimp up my Porsche

@DayWalker, good idea! I have added a link in my description to see the diff to the original parts list. - You will need 224 additional parts to the original set 42056-1. Use rebrickable's compare feature to see which parts you need.

@DayWalker, I have built and tested your reverse gear blocker. It is a really compact design and works fine completely hidden below the panels. And it is fully compatible to all the other MODs in the "Pimp up my Porsche" collection. But I personally like to be free to shift my Porsche between D-N-R in every gear, even if it is not "real". And I would like to keep the original D-N-R stickers, that do not match to the blocking function. Nevertheless a useful MOD for everyone who likes.

After building and testing some of the new MODs in this forum I have updated "Pimp up my Porsche" to v1.2 including new building instructions on rebrickable.com. I added a gear indicator as suggested by @DayWalker and @Kumbbl. I like the very compact design and now you can directly see something happen when shifting, when all the other technical stuff is hidden beneath the body. I added lockable doors based on the design of @el Squatter and some optimizations by my own. This adds playability a lot, because it keeps the driver door closed when using the gear shift paddles. Opening and closing the door works very smooth and when you close the door, you can hear a cool "plop" sound as you would expect from a german car. And finally I reinforced the HOG steering: Thankx a lot lot for these cool new features and have fun to pimp up your Porsche, if you like!