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Modified 8880 Mark II - slightly more major mods
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Here is my 8880 which I have modified slightly further. The engine is now mounted at the front, whilst the rear axle and suspension have been completely changed.
About this creation


The engine is now a V6 to fit comfortably in the space available over the front axle, and transmission is via a chain to the drive shaft which runs beneath the front axle and steering rack. I have added a fan that is driven from the drive shaft via some gears.



View from beneath. The chassis of the front of the car is completely original, as is the gearbox; all of the changes I have made have been made to fit around the pre-existing design.



Close up of rear axle from below. The design from my original red car is replicated here - suspension by trailing arms, with universal joints either side of differential allowing independent movement of wheels which rise and fall with no change in camber. Change in rear axle design has completely eliminated any tendency for the wheels to toe-out - which was the main reason for me making this change. Yellow beams for the trailing arms forced upon me by lack of any other colour - but fortunately the yellow stripes already present enable me to pretend that I've got away with it (at least when viewed from the side rather than from below)!



And a shot to demonstrate the operation of the rear suspension with this very effective style of axle.



Close up underneath front of car, showing the chain drive. In order to accommodate the chain drive, the gears used to operate the pop-up headlights had to move to the right - hence the pair of universal joints seen under the engine. Obviously the transmission shaft from gearbox to engine now sprouts from the front of the gearbox, with gears to tranmit rotation from there to the new shaft underneath the steering rack.

Together with the modified front suspension and steering seen in my earlier modification of this car, the overall result is a car that rolls much more freely (backwards and forwards) than the official version and has a better looking front end in my opinion. The only parts used in addition to the 8880's own parts were the beams for the trailing arms, three universal joints, an "old" style differential in place of the standard, and a handful of gears, axles, and bushes.





Comments

 I like it 
  July 4, 2012
love it i have this set also and you have improved it well done
 I made it 
  July 3, 2012
Quoting kurt Soares Interesting Mods! Like the reposition of the engine, and I understant why you changed the rear axle, but I think a similar solution of the original would be better. Now you´ve got allot of space in the trunk to put it RC (but maybe is not in the plans and it´s to heavy..) :D
These modifications have certainly resulted in a very unsatisfactory result where the engine used to be mounted I must admit - a proper solution might be to rebuild the rear bodywork into a more realistic rear end and opening boot. Maybe one day !
 I made it 
  July 3, 2012
Quoting K Wigboldy Well done. I am a fan of the dynamic rear differential as I did in my Red Car (http://www.brickshelf.com/cgi-bin/gallery.cgi?f=343998), though I really like how you used trailing arms rather than a dual A-arm setup.
Cheers - I have seen your independent rear suspension on one of your other models, and would like to try something similar in one of my future efforts !
 I made it 
  July 3, 2012
Quoting Polomoche Mann The independent rear suspension setup is just unreal! It looks pretty straight-forward but also very effective. This is definitely a setup I'll keep in mind for my future builds! Thanks for sharing this :-)
Cheers - though another thing to consider if you try this axle set up is to make sure that the trailing arms are long enough - any shorter than they are on this model and undesirable things will happen to the propellor shaft when the suspension is compressed ! My red truck MOC on these pages is an example of what can happen if you get the geometry wrong - the trailing arms were too short, and as a result the prop shaft slid backwards and forwards slightly but noticeably at its front end as the suspension travelled. Have fun trying it out !
 I like it 
  July 3, 2012
The independent rear suspension setup is just unreal! It looks pretty straight-forward but also very effective. This is definitely a setup I'll keep in mind for my future builds! Thanks for sharing this :-)
 I like it 
  July 2, 2012
Nice mods, I like the new engine. You should add this to the group "Set Modifications"; it will fit in perfectly.
 I like it 
  July 2, 2012
This most sophisticated of Technic cars just got better. Well done!
Daniel Wareing
 I like it 
kenneth rattledge
  July 1, 2012
the front mounted engine looks ok, just looking at how you have done the rear suspension, with the trailing arms it looks as if the diff would be better fixed into the trailing arm, to form a complete live axle, although it becomes less independant, it would stop the twisting effect you would get on the lifting arms.
 I made it 
  July 1, 2012
Quoting kenneth rattledge the front mounted engine looks ok, just looking at how you have done the rear suspension, with the trailing arms it looks as if the diff would be better fixed into the trailing arm, to form a complete live axle, although it becomes less independant, it would stop the twisting effect you would get on the lifting arms.
Cheers Kenneth ! The rear axle actually works extremely well - even though it looks as though it shouldn't ! The key is making sure that the pivot points between the chassis and the trailing arms are robust enough to prevent any twisting, restricting any movement to strictly up and down only - hence the double beam trailing arms braced by pivots on the chassis on both sides of the trailing arm (with an extra beam added to each side of the chassis to achieve this). So long as all of the transmission is running smoothly (this is far smoother than the standard version driven by those grooved balls within the wheel hubs) there is no problem of resistance at the differential. The geometry is almost identical to that on my "red Volvo type car" though the suspension travel is a lot greater using the longer springs !
 I like it 
  July 1, 2012
Well done. I am a fan of the dynamic rear differential as I did in my Red Car (http://www.brickshelf.com/cgi-bin/gallery.cgi?f=343998), though I really like how you used trailing arms rather than a dual A-arm setup.
  July 1, 2012
Interesting Mods! Like the reposition of the engine, and I understant why you changed the rear axle, but I think a similar solution of the original would be better. Now you´ve got allot of space in the trunk to put it RC (but maybe is not in the plans and it´s to heavy..) :D
 
By Daniel Wareing
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LEGO models my own creation MOCpages toys shop Modified 8880 Mark II - slightly more major mods


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