AoD
Well-Known Member
- Messages
- 429
- Location
- Hammondsville, Ohio
Well, as some of you know, I recently had a pretty bad day ending crash. It led to two new servo's and a rather, odd, engine problem. I got the servo's installed and the story just thickened.
First, I was having an issue where my motor was just magically consuming a tank of fuel in 5 minutes. I thought it might have been a leak, so after careful inspection, I found the nozzle for my pipe was broke into pieces. I cleaned it up, and ran it, same problem. I changed the pipe with a pipe from a .15 AE, and still eating a tank in 5 minutes.
I cleaned the entire truck, looked for leaks for hours, nothing. I couldn't find a leak anywhere! So, I tried it again, still eating more fuel then my 6.0l in my silverado. I was determined that it was something in the motor or carb.
I took the motor apart, and checked everything for an internal leak. Such as the carb blockoff on the crank, the sleeve, the piston, I found nothing. Everything looked perfect, and no leaks anywhere. So, I pulled the carb, pulled the needles, and sill nothing. Everything looked just fine! I don't know what else to do. I tried the airleak test, nothing, tore it apart, nothing was broke. I'm at a loss at this point. And anyone that read my messages in the "shoutbox" knows, it was a long night lol
So, I put it all back together, cleaned the entire truck, had it all ready to go the next day, since it was late. I worked on the thing from about 2:30pm until after 12:30. I didn't know what else to do.
The next day, I fired it up from the stock settings, took it outside and ran it. The tank lasted almost 11 minutes?! The next tank, where I started to retune the carb, lasted almost 15!!! It's going away? Magically? I hit my third tank, and it just went nuts. More power than it had before the crash! It was hitting second gear and pulling the front wheels up! I hurried up and checked the temp, and it was at 228F, right where it should be. It was set a little leaner than my setting from before the crash. Even though, the temperature outside was only 2-4 degrees warmer? I was at a loss here. It ran over ten tanks, and just got better. It never went over 235F, even with no high speed cooling runs. I was amazed and shocked. The last tank I ran through it was about 17 minutes long. I had about 1/4th of a tank of fuel left, and I was having a ton of fun! Next thing I know, I strip the spur gear!
Before the crash, it'd never hit second gear quite right, and I figured I'd have to adjust the shift point. Now, it's shifting superbly, and there's no problems. It's shifting into second pre-half tank lean. And after the half tank lean, it's running 230's in temps? It's around 200-210 before the leanout. I was more than amazed.
I had tried EVERYTHING I know about these motors. It was almost like it just didn't want to run. Nothing seemed broke, or wore out. Nothing was holding it up. Nothing was leaking, or cracked? Maybe it was just having a fit?
I am more than happy with the results though, as it's like having a brand new truck (just like it should have been). It's more powerful now, then it was before my crash. I'm just astounded at the power of it, and I don't think I need an LRP now.
The only thing I can come up with, and this one is a LONG shot. In my experience with ATV 2-strokes, their break-in periods are random. Sometimes it takes a tank of fuel, sometimes 3 or 4. When the motor finally breaks in, the rings will seat perfectly to the piston and cylinder, causing an increase in compression, and a burst of power that's just about unheard of. This is exactly the way my truck acted. But, being how the anatomy is just so different with these nitro motors, I don't see how that's possible. If you have any idea, please, toss it my way. I've broke in/ran many, upon many engines over the years, and this is a first for me. Never have I seen anything like it.
😛artyon:
First, I was having an issue where my motor was just magically consuming a tank of fuel in 5 minutes. I thought it might have been a leak, so after careful inspection, I found the nozzle for my pipe was broke into pieces. I cleaned it up, and ran it, same problem. I changed the pipe with a pipe from a .15 AE, and still eating a tank in 5 minutes.
I cleaned the entire truck, looked for leaks for hours, nothing. I couldn't find a leak anywhere! So, I tried it again, still eating more fuel then my 6.0l in my silverado. I was determined that it was something in the motor or carb.
I took the motor apart, and checked everything for an internal leak. Such as the carb blockoff on the crank, the sleeve, the piston, I found nothing. Everything looked perfect, and no leaks anywhere. So, I pulled the carb, pulled the needles, and sill nothing. Everything looked just fine! I don't know what else to do. I tried the airleak test, nothing, tore it apart, nothing was broke. I'm at a loss at this point. And anyone that read my messages in the "shoutbox" knows, it was a long night lol
So, I put it all back together, cleaned the entire truck, had it all ready to go the next day, since it was late. I worked on the thing from about 2:30pm until after 12:30. I didn't know what else to do.
The next day, I fired it up from the stock settings, took it outside and ran it. The tank lasted almost 11 minutes?! The next tank, where I started to retune the carb, lasted almost 15!!! It's going away? Magically? I hit my third tank, and it just went nuts. More power than it had before the crash! It was hitting second gear and pulling the front wheels up! I hurried up and checked the temp, and it was at 228F, right where it should be. It was set a little leaner than my setting from before the crash. Even though, the temperature outside was only 2-4 degrees warmer? I was at a loss here. It ran over ten tanks, and just got better. It never went over 235F, even with no high speed cooling runs. I was amazed and shocked. The last tank I ran through it was about 17 minutes long. I had about 1/4th of a tank of fuel left, and I was having a ton of fun! Next thing I know, I strip the spur gear!
Before the crash, it'd never hit second gear quite right, and I figured I'd have to adjust the shift point. Now, it's shifting superbly, and there's no problems. It's shifting into second pre-half tank lean. And after the half tank lean, it's running 230's in temps? It's around 200-210 before the leanout. I was more than amazed.
I had tried EVERYTHING I know about these motors. It was almost like it just didn't want to run. Nothing seemed broke, or wore out. Nothing was holding it up. Nothing was leaking, or cracked? Maybe it was just having a fit?
I am more than happy with the results though, as it's like having a brand new truck (just like it should have been). It's more powerful now, then it was before my crash. I'm just astounded at the power of it, and I don't think I need an LRP now.
The only thing I can come up with, and this one is a LONG shot. In my experience with ATV 2-strokes, their break-in periods are random. Sometimes it takes a tank of fuel, sometimes 3 or 4. When the motor finally breaks in, the rings will seat perfectly to the piston and cylinder, causing an increase in compression, and a burst of power that's just about unheard of. This is exactly the way my truck acted. But, being how the anatomy is just so different with these nitro motors, I don't see how that's possible. If you have any idea, please, toss it my way. I've broke in/ran many, upon many engines over the years, and this is a first for me. Never have I seen anything like it.
😛artyon:
