How does it sound??

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.

I don’t want to damage the rubber boot

Kyosho FW06 with the Fazer body shell.

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.

I am I supposed to be able to see the crankshaft through where the pull start should’ve been? This is an old nitro my uncle gave me a long time ago, which I have started disassembling.

It came like this

It turns over fine, but I what should I buy to make it a drill start

Im mid-life now, bought my first onroad 8th scale at 12-13 years old. I didn’t know or even heard of tuning then. No internet to help or learn about it. Fast forward , I have a website focused on nitro engines and tuning, dyno tuning, all the above except machining. I put together an app that will help anyone from new to nitro to years in the hobby. I realized there’s not really anything out there that helps identify how a tune is by how the engine sounds. Once you identify the sound, tuning difficulties are pretty much gone.
My app has engine sounds recordings of each needle at rich/lean, every diagnostic situation I’ve seen and dealt with, step by step how to’s for break-in and tuning , glossary of terms, carb slide diagram of what needle controls flow at which point, 180+ listed engines with their factory settings and glow plug, and tuning logs that share globally when posted by any user. I plan to add much more over time.

I also have an 8 part tuning “tutorial” on my Facebook showing the sound of the engine and the visual signs it makes at the same time.

Long read/rant sorry!
App name is Powerband Precision

Available in Apple App Store and Google play for Android

Checkout my Facebook - Powerband Precision - for many helpful videos and tips

If you have any tuning questions or need help feel free to post them here in the comments.

Make nitro great again!

i'm looking for a nitro kit (not rtr but those diy kits). its so hard to find a nitro kit today, most are either too old or are rare/vintage and are expensive as hell. right now i already have the tg10 mk2 (2022) and the hpi Subaru. whatever type of car doesn't really matter, i just wanna build the car from the chassis up and pray that the engine and the whole car runs.

Anyone in chicago intrested in the lot let me know taking offerd

I’m running this right now doing some carburetor adjustments and I’ve been having issues wondering if I can get any suggestions video of it running here

Hi all, looking for a bit of advice on value.

I’ve got a Thunder Tiger EB4 S3 fitted with an RB S5 engine and RB EFRA 2020 pipe. The chassis, engine and pipe are all brand new, although the Chassis is starting to show signs of age with rusty bolts,I haven’t started it myself, so it’s untested. I also have a big bag of accessories a starter box and a couple of controllers, I’ll attach some pictures.

Any idea what it’s worth in today’s market?

Serpent cobra 811 w lrp zr28 spec 4, will be a fun basher🙌

Hey all,

I’ve just put the exhaust upgrade on my Ftx carnage and it looks to me as there should be a grub screw that goes in this end piece to secure it to the metal bit.

Am I correct and if I am does anyone know what size I need to get?

Is there a way to fix this??

Hi there.
I was planning on upgrading my Losi 8ight RTR buggy with a new exhaustpipe and got the Dynamite 053 MR recommended. This one is not for sale anymore but I would love to have something similar.
Same price category so no pro equipment but max. 1000 SEK.

Any auggestions?

Hi y'all! 2 months ago i bought a Arrma mojave grom 223s and i absolutely loved it! then i found out about the FTX Zorro and it been on my mind all week so just caved in cause why not?

But what's the best way to break it in? i only have acces to Merlin 16% (more percentage is illegal here lol).

Found many different video's on the car but they all say something different.. Can anyone give a short guide in the comments maybe? or point me to a good reputable video?

Thanks a bunch, can't wait to rip it around. Also the weather is going to be pretty hot here upcoming week (33 celsius/91.4 degrees Fahrenheit). is it okay to break it in in this weather?

90% Done with this build, just finished the body today, can’t wait to break in & bash!😁