A few weeks back, I had the privilege to pick up this Nitro RS 4 3EVO from a fellow Redditor. After a bit of cleaning, parts and patience, today it lives again. I was not able to fill the small run, but I was able to capture the first start and idle.
I have ordered a new engine for my revo but by the time I'll get the fuel I have would be 6 months old and I have another jug that about 2 3 years old I don't remember when I bought it
I found an old Traxxas Tmaxx and rebuilt the engine and got it running. It has been running decently (a few problems) for a few weeks, but earlier when I hit the throttle it suddenly cut off and was seized up. The flywheel and clutch assembly had disconnected themselves from the engine and when I took the engine apart, I saw that there was a hole in the side of the piston, and the connecting rod was snapped. There were pieces of the piston down in the crank case jamming the crankshaft, so I think that what happened was the piston broke, and then the pieces went into the bottom of the crank case and stopped the crankshaft instantly, breaking the connecting rod. There are gouges in the piston near where it broke. What originally caused the piston to break, and how can I make sure it doesn’t happen in the future?
ETA: this is my teenage son posting. He received a twenty-year-old box of pieces and multiple engines and took everything apart and rebuilt it. He has no one at home who knows anything about engines/motors/RC cars.
Hi! Finally got my Zorro tuned up correctly (i'm a beginner).
1 hour later my throttle servo broke, i have another servo laying around from another robotics project. A MG996R 180 i believe. Can i just drop that in or would i break something? It's slightly larger but just by a margin.
Otherwise i'll have to order another servo but these standards ones break so easily so rather not buy the same one
what all should I do to it? It was my dads and hasn't been ran in many years. All I know about it is it has a Axial .28cc grey top and needs new electronics.
Started life as a very old and well used nitro rustler with the .15 motor. Motor was about cooked as were the electronics and starter, so I took it under the wrench. Now sporting a 272r transmission in a mid-motor configuration, custom designed and printed tail mount for the wheelie bar, found a printable conversion that used the old nitro trans and altered that to be only a battery tray. Front is all stock nitro rustler. Maintained the stock top plate and everything.
•Things to still do:
•Make an esc mounting plate
•Mount electronics (10bl120 sensored esc, justock 10.5 sensored motor)
•Find wheels and tires(probably going to use an old set of SC tires for now)
•Get a new body(still has old body at least 20 years old I'd guess by brittleness)
•tune suspension springs and oil
Let me know what y'all think! Questions? Suggestions? Any similar custom builds?
🤘
I don’t want to damage the rubber boot
Kyosho FW06 with the Fazer body shell.
Needs engine bearings, a spur and the whole front driveline, but she was cheap
My new FTX Zorro Nitro wouldn't start at first, so i went to my local hobby shop. They gave me a base tune for the breakin period, and i read online to do a light break in for about 5 runs so i did (shop told me not to idle it a full tank for the first tank) so i just drove slightly and a little harder by every tank.
Now after roughly 10 tanks, it won't hold an idle well. When i remove the glow starter the engine stops immediately (not always). It runs fine if I keep giving it a little gas. But for example if i brake heavily or turn sharply it just shuts off.
Following the shop's advice for the bad idle, i adjusted the idle screw, which made the idle okayish. However unburned nitro is then spitting out of the exhaust, the engine was running quite hot too around 120°C / 248°F with an outside temperature of 32°C / 90°F, and the exhaust wasn't producing much smoke too.
I replaced the glow plug with a Fastrax Platinum 4 and turned the High-Speed Needle (HSN) in/out by 1/4 turn. That caused a heavy amount of nitro to spit from the exhaust.
I have new O.S. 8 glow plugs on the way just to be sure it's not that.
Looking for advice from those with some more experience. Tried running my trx 2.5 with an o.s. 11k carb today. For the life of me, could not get the truck to stay running without the glow igniter hooked up to the plug. I managed to get the truck idling great with the igniter hooked up, had a nice quick smooth acceleration to high rpm with nice trail of smoke, and came back down to a consistent idle quickly after releasing the throttle. But despite all of that, the minute I disconnected the igniter, the truck stalled.
I figured it was a glow plug issue, so swapped in a brand new one. Same exact problem. I am by no means proficient with nitro. Been trying to teach myself how to tune, but could use some help with this.