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Old 02-12-2010, 04:25 PM   #1
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Default Basics about tuning, please respond :)

I have a few questions for a 2wd nitro truck. Please answer any that you can!

1. When idling, what is the ideal "throttle" setting on my radio. Should my car be moving slightly, or not at all?

2. When I lift up the rear end and gas it, should the tires keep moving when I let off the gas? Or should it move a little, or somewhere in between?

3. When I gas it on the ground, should a lot of blue smoke come out of the exhaust? What is a rule of thumb for high end, low end tuning? I'm nervous to lean it out too much... I have fouled a few glow plugs since the break in process though.

4. When I use the brake, should my engine bog down a little, if any?

I think thats it for now
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Old 02-12-2010, 04:30 PM   #2
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The idle should not be high enough to make the truck move or engage the clutch.
The engine should not bog or decrease in rpms when you apply the brakes

You should see some blue smoke when you apply throttle but not a lot.

Read the tuning bible at the top of the page and it will tell you a lot.
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Old 02-12-2010, 04:35 PM   #3
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I've read that but I was just wondering about throttle mostly. I dont want to wear out the clutch or anything to harm the engine. When I lean it out, I still see blue smoke. It kind of "bogs" a little bit so I richen it up again.
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Old 02-12-2010, 05:11 PM   #4
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I've read that but I was just wondering about throttle mostly. I dont want to wear out the clutch or anything to harm the engine. When I lean it out, I still see blue smoke. It kind of "bogs" a little bit so I richen it up again.
"Bogs" means it is running too rich, not lean.
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Old 02-12-2010, 05:15 PM   #5
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Well I heard when you gas it it will bog if its too rich and too lean. Maybe bog isnt the correct term, but it seems like its slipping
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Old 02-12-2010, 05:19 PM   #6
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Well I heard when you gas it it will bog if its too rich and too lean. Maybe bog isnt the correct term, but it seems like its slipping
Well from all my years of racing real cars, we only used the term "bog" when the car is too rich. It happens when you have some much fuel you are suffocating the engine. This causes a brief hesitation or stutter when gassing the engine, especially from idle. Losi sends all of their vehicles from the factory insanely rich from what I've seen. With the factory carb setting you could barely start my Ten-T.

I think the best ways to check if it is too lean is to see if it is getting too how and lack of smoke.
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Old 02-12-2010, 07:57 PM   #7
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Yeah bogging is because of being rich. Cutting out is a result of being lean. I can see where someone knew wouldn't know the difference, but it's a BIG difference.
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Old 02-12-2010, 08:05 PM   #8
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I understand its a big deal, but you summed it up pretty well. So if it's bogging when I throttle it, then lean it out? and if its cutting out, then richen it...? I think I got it lol. I raced MX for 10 years so I know the majority, but this RC stuff is a little more sensitive when it comes to tuning
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Old 02-13-2010, 12:58 AM   #9
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I understand its a big deal, but you summed it up pretty well. So if it's bogging when I throttle it, then lean it out? and if its cutting out, then richen it...? I think I got it lol. I raced MX for 10 years so I know the majority, but this RC stuff is a little more sensitive when it comes to tuning
True dat. But when you find the sweet spot the smile will hurt your face.
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