Engine Temperature?

[Dbutch]

Hey Does anyone know how hot the engine should be? I have the menace 21, and I dont know how hot that engine should be.
Thanks guys

 

[Domination]

200-270 range

 

[Dbutch]

thanks, now i read somewhere that the temp. could actually tell you whats wrong with your car. For example. If to hot then it is to rich. Did anyone hear of that before. If so where could i look up what the temp mean.

 

[Don Freeman]

To hot !!!!!:flamer: Way TOOOOOOOOO LEAN!!!!!!!!!!

If you can keep the temps down below 250 degrees,
your engine will last a lot longer...........:flamer: :flamer:

 

[El Pirata]

Just keep it below 300 and don't worry so much about the temp. If it's running good for you then leave it at that.

 

[Don Freeman]

:horsecrap YOU MAY run at 3-00, for a while BUT you won't be running long...........

I have run with the BIG DOGS for about 30 years,,,,,,,,

The problems are amplified in Degrees..........

If you have Deep Pockets ,,,,Run your engine as hot as you like,

Keep the degrees down ,below 250. your engine will preform well and last longer,also......... :violin: :stupid: :flamer:

 

[GilBeQuick]

I agree with El P 100%. I personally think people worry way too much about getting temps above 250º. Tune it for performance, just make sure you've always got a steady trail of smoke at all times. If you've got lots of smoke, you're running 290º, and it's running great then leave it alone.


Hey Don, what "big dogs" have you been running with for the last 30 years?

 

[Diver6127]

First thing to shoot for is temp. That will give you a good baseline (220-250 F). After that, tune for performance. A steady trail of smoke is a sign of good lubrication. Try not to go over 300. If you have trouble starting your engine after it cuts out and won't start till cooled, then you're running hot. Run it too cold is also bad. Low temps don't allow the sleeve to expand and will cause premature breakdown.

Each engine has a sweet spot. For example, my OS 12 cvr-x ran great at 230. My OS 15 cvr runs exceptionally well at 245-250. Find the sweet spot.

Remeber, ambient temp also may require slight retuning.

 

[Bug_In_The_Rug]

i may be wrong, but steady smoke is unburned fuel and unburned fuel is wasted which shows there is too much lubrication. if you can get it so it just barely puffs out smoke you are not running too lean and creating good power.

 

[Diver6127]

Originally posted by Bug_In_The_Rug
i may be wrong, but steady smoke is unburned fuel and unburned fuel is wasted which shows there is too much lubrication. if you can get it so it just barely puffs out smoke you are not running too lean and creating good power.

Blue smoke is from the oil/lubricants in the fuel. Remember, this is a 2 cycle engine. Lubricants are needed in all engines. In a 4 cycle, the oil is kept seperate.

To have little or no smoke will fry your engine. You need steady trail, unless you like changing engines every few runs.

BTW, if there is raw fuel, you will see it being spit out of the stinger when idle. Lean it out a little at a time. As I said, tune for engine performance, within reason.

 

[Don Freeman]

My two cents;

The Big Dogs I speak of are ,to name a few,Gene Husting,Curtis,
Husting, John,and Helen Thorp, Moe Lorra,Gary Keys,Ron Paris,
peepee Mc Coy:tophat: :thankyou:

Just to name a few........Some of these guys are the origionators of ourHobby/Sport

And yes I am an old codger,and still love to race........

 

[SkyMaxx]

Welcome to RCNT "old codger".

Looks like you have us all on the experience level and certainly on the time level. We welcome whatever wisdom on this hobby you have to bring to the table.

 

[Don Freeman]

Thanks, for your welcome note.

I didn't mean to imply the engine temp ,to tune too, Just as a ball park guide ,...........such as the pinching of the fuel line ,as a guide.
Just my two cents

 

[Nitro10]

engine temps

How hard do you guys "run" your engines before you check the temp? I usually do 3 or 4 high speed runs approx. 50 -75 yards....is this ok? I'm on my 2nd gallon of O'donnell 20% race blend and this stuff doesn't put out as much smoke as the other fuels. I have seen 300+ a few times and try to avoid it. Does anyone know how much oil is in the O'Donnell race mixture?

 

[SkyMaxx]

I generally check it out throughout the first tank. If things are well (meaning between 200 and 270), then I don't check it until there are signs of trouble.

If I am tuning the engine, I generally check it pretty frequently after the first few minutes of running. Yes, I put it through some high speed runs to get the engine up to temp, but I generally do not wait until I've been running it for most of the tank.

 

[Waste Land]

I agree with EP on this as some people have diffrent ideas of how hot a engine should be. I say just make it start, and run easy and keep the temp under 300 degrees with a steady trail of smoke coming out. I understand that aslong as there is smoke going out the engine is said to be running rich and safely but i still have this little 300 dgree mental barrier I dont wanna break.

 

[flash183]

another thing

after going easy on my new RB engine I was surprised when i let it loose *a little* and the temp ran up near 300. someone with more experience than me (not hard to find) pointed out that, while at idle, my clutch was engaged. He said that produced extra stress and was likely the cause of my over heating.

i'm glad to know that because i was running it pretty rich and didn't know what else to do.