Bogging Savage with video/sound

[Benwahballz]

I was running my savage for a bit, and it seemed to be running great. Then I filled up the tank for a second run. After that fill it seemed to run worse than the first tank. I would take this small jump, get the front wheels to bounce and then I could get the front wheels off the ground no problem. It was fun to acutally wheelie. Then I busted out the video camera and got a buddy to tape for me. Here is a link to the video
Boggin

After I hit the small jump, I hit full throttle and it just bogs on me for a sec, then takes off. Which needle setting would I have to change to make this resposiveness better. Also does the truck sound like its running fine?
I just changed the plug, and then I was tuning the HSN slightly to see if it would get better/worse,and it wouldnt, so I thought I would try the LSN, no help........What could be the problem?

 

[olds97_lss]

I didn't hear it bog... at least not anything significant. I played the vid like 6 times and never noticed anything not normal, other than it was a little light on smoke.

 

[joneser4u]

Was it right after you filled the tank? The Savage will always run alittle rich with a full tank. Other than that it sounded pretty normal?

 

[Benwahballz]

I guess its not really BOGGING, its more like it HAD power before and lost it, its right after it will do a jump it seems gutless. How can I tune it to UP the smoke output? should I be putting it back to factory settings and work from there(thats what I kinda just did, and the settings its at are prolly the best its seen)? Guess I just have to tune it daily.
I also thought it was a little light on the smoke too. Hows about temperature making a difference?? It was pretty damn cold outside ( like 2-5 deg. celsius) I would imagine that would make a difference

 

[olds97_lss]

Cold weather does make a pretty big difference. It makes it harder to keep the engine head temps up. Most engines run best with the temp around 205-250 at the glowplug.

Today when I was driving, whenever I fueled up, it was real doggy until it got warmed back up. It was about 50F here (10C), and the 10-15 seconds it takes to fill the fuel tank was long enough to drop the engine temp from 205 to 170. Then it was doggy for about 20 seconds or so until the temps got back up.

Granted, I don't have the same engine or fuel tank as you probably do, but the temp's still have an effect regardless what your running. My engine has a small head on it (it's a buggy engine). A friend of mine was running a XTM 24.7 with a ACNC head (HUGE!) on his and he was having a hard time keeping it running right. He could barely get his temps up over 180.

After leaning mine out just a bit on the high speed, it would get up to 230 or so and it ran great. Also, being quick on filling the tank made it less doggy for less time.

Smoke isn't always a good sign of how an engine is running... unless you've run a lot of fuel through the engine and know what to look for. I know mine runs good with a light smoke trail when I'm on the gas hard. If I richen it, it doesn't run very well (although there's lots of smoke) and if I lean it, it heats up and doesn't run very well (minimal smoke).

The reason I said anything about smoke is that normally, when it's rich it makes it doggy and unresponsive, but there's also a really noticable smoke trail. With the engine lean, there's little or no smoke but it's also doggy and unresponsive.

Starting at stock settings is normally rich with most engines (all the ones I've owned it was rich). Those are again, normally, settings required for break in. Also for reference later if you get the engine totally out of whack.

In the vid, you didn't really open it WOT up ever... it was to short to tell. But it sounds like your a bit lean from what you say. You open it up a bit to hit the jump, then let off, then it's "doggy".

Let it sit idle for about 10-15 seconds, then punch the throttle. If it bogs, your low speed is probably rich. When changing needle settings, only do it 1/8 turn or less at a time. These things are very VERY sensitive to change.

 

[Benwahballz]

Wow, thanks for the feedback. Might have to take it out a few mrore times before parking it for the winter. Now that you gave me a few good pointers.
Thanks again.

 

[Benwahballz]

Is it possible that a faulty plug could be the problem?
I just changed the plug for a new one, I put them both (original one and new one) on the plug ignitor and they seem to glow about the same, I put about 3/4 of a gallon of fuel through the first plug and it worked well, then I changed the plug, and ran 1 tank of fuel, it ran great, second tank not so well. Would this make a difference?