1/5 scale brushless monster conversion. tips welcomed.

[Ryu James]

Originally Posted by lincpimp

Good luck with the GTRe. I had one and thought it could do with quite a bit of work to be competent for high speed. The center brace limints battery height, mine had alot of drag in the belt setup, and the barkes just did not work well. Plus that big electronics box is kinda dumb, it would be better to have a battery tray on that side too. And you motor choice will be a bit limited due to the special 3 gear pinion with 1/8 bore. Maybe get a medusa 50mm with 1/8 shaft, but I think a larger motor would be required to run 100mph...

Sounds like an interesting project, I have only seen a few GTPe floating around, I had mine well over a year ago. It was brand new when I got it.

hey pimp,
so do you still have your GTRe? i have heard that these are pretty rare. at least that is what the guy told me that i bought it from. but i noticed you can still get them on the schumacher site.

here is what i am going with. i have looked at all this stuff and it all fits pretty well.

Mamba Max ESC
Castle 5700kv motor (1/10 of course)
losi 3200mah 3cell lipo (would like to run a thunder power but wont fit....maybe with some mod i can make it work)
2 jr9100s servos
many alum and titanium schumacher upgrade parts

as for the 100 mph you may be right. many of these 1/10 brushless motors push the RTR trucks at 70 mph out of the box so i figured that this GTRe with the 3 speed would do 100mph+ with those extra gears.
i assumed that 3rd gear would be very tall and that 2nd gear would be similar to the gearing of the single geared RTRs that do 70mph.
well, after looking at the gearing it appears that 3rd on this GTR is about the same as the RTR stock pinion and spur setups like the Rustler and the Losi speedT. anyway, i may just have to scrap the 3 speed trans and come up with something different. will just have to wait and see. But i know these motors could do 100mph with the right gearing. if my Rustler VXL had a 2nd gear....whoa.

[tc3_racer_001]

imo in regular setups, gears = something more to break lol. kiss :)

[rhylsadar]

hi

i would also target around 25'000 rpm. a good tuned zenoah does bout that.
those cars are geared very high so you need a high torque motor. the 30er lehners seem to be about right or the plettenberg bolido. there also the pinions fit directly on the 10mm shaft.
a schulze 40.160 should do the job. if the promised XXL schulze 40.300 come out soon (?) those would be even nicer. i havn't converted one of my FGs yet but personally i would also do some kind of small watercooling circuit as there is some much room in those cars.


bye
rhylsadar

[Ryu James]

Originally Posted by rhylsadar

hi

i would also target around 25'000 rpm. a good tuned zenoah does bout that.
those cars are geared very high so you need a high torque motor. the 30er lehners seem to be about right or the plettenberg bolido. there also the pinions fit directly on the 10mm shaft.
a schulze 40.160 should do the job. if the promised XXL schulze 40.300 come out soon (?) those would be even nicer. i havn't converted one of my FGs yet but personally i would also do some kind of small watercooling circuit as there is some much room in those cars.


bye
rhylsadar

hey rhylsadar,
where do you get parts and stuff for your 1/5 FGs? i havent been able to find any good site for 1/5 scale hop up parts.

[Ryu James]

just an update. i am waiting on carbon fiber sheets from dagraphite.com before fabrication begins. also, i am awaiting my ESC.

[mohanjude]

I decided to install the Plettenberg Bolido in my FG touring car and build a car for speed. Alas it was quick but too quick. It kept wheel spinning even with the most gentle throttle curve. To keep the mechanical brakes I decided to use a converted Futaba 9CS transmitter with the gimbals that centred on the spring on the throttle side. I then used a mix to apply brakes when the throttle was 1/3rd in reverse position and let the brakes off at 1/2 stick reverse position. The schulze controller only applies when the stick is in reverse in 1/2 position and after a delay of about 1 second. SO basically I have Mechanical hydraulic brakes and elektromotor brakes which can be weakened by using a the boat setting on the schulze.

The lipos are Thunderpower extreme V2 - 5000MA and running 2 sets to have a combined voltage of 44.4v. The total rpm should be over 35000 rpm on the bolido but I have restricted it on the throttle curve to stop the destruction of the motor.

The motor mount is a custom job and took less than 2 hours to mount onto the vehicle. I did not make the mount but have now sourced a chap in germany who can make them.

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I had to change the wheels to stadium wheels as I kept burning the road wheels - I burnt a set within 1 hour. The stadium wheels looks a bit silly but I need to think of an innovative way of mounting a shell - perhaps a MT shell?

I am now waiting for the next conversion which is to mount a Lehner 3080 Monster motor onto a MCD 4 WD truck and power it on 18S.


Mohan

That build is huge!

Well done.

Have you got any video yet??????

[mohanjude]

OK I made a couple of videos. It was a wet day and I could not push the throttle more than 20% of the range. However I did manage to get some videos posted.

Any tips are welcome on how I can improve traction.





This is the car running on a paved road at and speed gun showing 39mph. If I tried to go any faster the car would spin out of control.




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This video shows how the car was difficult to control in a wet lane with lots of leaves to make things worse