1/6th Scale Chevy Monster Truck

[nitrostarter]

Well the stock 3905 tranny doesn't have the 2 speed in it. It is a single 2nd gear. Ratio is 1.83333

[NickRummy]

Interesting. So you have to buy the 2 speed kit to get the other gear ratio? This thing is going to be fast with that ratio. I'd like to have the 5.09 for a second gear. That would give me a big range.

Got the mounts done and motors in. Seems to all be fine. Top motor sticks up higher but not by a whole lot.





Electronics tucked back into place



Looks like whoever was driving last got a little muddy

[NickRummy]

While waiting on the two speed to get here I started looking into something else I've always wanted to do with an RC. It's been done before so it's nothing amazing but I wanted to approach it differently.

This is just too cool right?

Stopped at the local Harbor Freight and found some inner tubes that fit inside the Jumbo Kongs. 8" OD x 2.5"w wide for a 4" rim. I'm running 3.2" rims but that's ok.

Deflated inner tube



Added a little air to see how the fit would be



Not to bad. A little narrow.



Drilled a through hole for the valve stem



Put the tire on.



Added about 10psi to see what would happen.



Since the tube was too narrow it didn't stay centered.



I took the stock foam which is 4" wide and cut 2" out of the center. Then I used the 1" rings left over on either side of the inner tube inside the tire.

[NickRummy]

Inflated to 20psi (on mistake, thought the gauge said 10psi) next to a jumbo kong that has nothing inside it.





You're probable wondering the size difference? The stock Kong measured 8.4". The inflated Kong?



Yes, it's insanely big!



However, 20psi was too much and the inner tube blew sometime over night. I have to pick up another one at lunch today. I built the 3 other tires and they have all held at 10psi so far and measure around 9" OD