Do you have to let your engine warm up?

[sweetquads]

I just bought this Revo. It has a Sirio .23 motor in it and start quick. But when i go to make the truck go the engine rev up a little and it acts like it wants to go but it dont go Someone told me that maybe its too cold (Like 50f) and i need to warm up the engine. Is that possible? It seems to me that its binding somewhere, but it can't be.
Any suggestions?

 

[Jeep]

I've always made a habit of letting mine warm up a bit by slight throttle increases, nothing sudden or over 1/4 throttle, then I ease into the throttle to full listening to the engine, if it starts to stutter, I let off, otherwise i ease on to full throttle, then give it a few "idle to 3/4 throttle blips" and if it responds well I let it rip. Otherwise I warm it a bit more with easy half throttle runs until it will take a quick "idle to full" throttle pull.
I'm not sure ,however, if it is necessary to do this. Sounds like you may have a drive train problem.
Do all of your differentials seem to be functional? as well as your clutch not dragging?

 

[sweetquads]

But if it was cold would that make it not go like it should?

 

[Jeep]

cold air rushing in on a glowplug while the engine is still cool can cause the glowplug element to diminish in heat which is key to igniting the next fuel mix in the chamber. If it's overly rich, then this situation is worse, as fuel(nitromethane-methanol) has a very high evaporation rate and that draws(removes) heat from it's surroundings.

 

[sweetquads]

But if it was cold would that make it not go like it should?

 

[Jeep]

if it's cold and your glow element cools, yes, if it's cold and your fuel mix is slightly rich, yes.
If you leave your glowheater on the plug and let it run a few secs, and then throttle up, what happens?

 

[sweetquads]

I will let you know tomorrow, dont think my 90 year old neighbors would like it too much me starting the truck this late I am gonna start it tomorrow and let it warm up for a few minutes before i hit the throttle and see what happens.

 

[Jeep]

don't just let it idle, as it will load up on fuel and die,,give it a little throttle , nothing sudden though. I'll be on later tomorrow, and many others here can help as well and will. Just have patience, don't let it get you mad at it

 

[sweetquads]

I am not impatient, just didnt want to do any damage. Hopefully it will all be good tomorrow.

 

[.21Rc10GT]

Is the engine broken in, or brand new?

 

[sweetquads]

Pretty much new. It was running way to rich so i leaned it out a little and it was running fine, then all of a sudden it just died and wont start

 

[Jeep]

what kind of battery are you using for the glow starter?

 

[jetmechG550]

I keep a heat gun in my pit box, I also run indoor nitro in the midwest which can mean cold temps in the pits. I blast the mill with the heat gun for a couple minutes and then hit it on the starter box and it fires right up, usually about 150-180 degrees. I like to have it running for about 2 minutes before me heat warm up session. During warm up I am constantly blipping the throttle in short bursts so it doesn't just sit there and idle and load up.

Now, if you were running fat and leaned it out you may have fouled the plug, either from it being too rich, or too lean.

 

[Plaidfish]

you really got more engine than a newbie should be dealing with IMO.....you need to drop the stock engine back in before you blow up a good mill if you don't understand nitro engine tuning yet.......first off you never answered som basic questions that were asked...
is there any binding in your drivetrain?
was this mill broken in?

next have you tried a new plug?
it may well be a new plug but9 times out of 10 it's a bad plug when it won't start like that....also I won't run my nitro when it's below 55...too much of a PITA and glow plugs tend to pop easier (but I'm just too lazy to figure out a good plug to run when it gets colder here, I like the way mine run and don't want to mess with it too much to run in the colder temps)......

another thing have you temped your mill when you were running it?
and remember running in colder temps you need to run richer not leaner to bring it up to temp.....the colder air has more O2 in the same volume of air when it's warmer...

 

[Cupooterluvr]

I tap the throttle to about half speed to warm mine up, plus it lets me check the smoke trail before I let it off the box (I put it on a little box to start it). If I need to, I can also use a radiant heater for a few seconds to heat it up. Starting it on a stand and tapping the throttle warms it up pretty quick, but I don't know if it's good or bad for the engine to do so. (Is it?)

 

[RevoME]

My 2.5R is running for a few minutes before it will take some power, same problem here. It seems to be the cold air rushing in to cool down the glow-plug... mine runs fine after 3-4 minutes quarter throttle and once the temps above 120 it will take higher loads.

 

[Cupooterluvr]

My engine has a hole in it, but it still runs fine at startup. I don't have to warm it up unless I want to make sure it has a nice good smoke trail.

 

[jetmechG550]

My engine has a hole in it, but it still runs fine at startup.

WTF are talking about? A hole in it?

 

[neobart]

It's called the exhaust. :green-grin:

Sorry man, couldn't resist.

 

[jon2]

WTF are talking about? A hole in it?

Its a different thread bro. No need to re-hash that one here.