Temp Questions

[windy city maniac]

When To Take The Temp?

What Is Proper Temp For Kyosho Mad Force?

If Too High Then What?

If Too Low Then What?

What Else Do I Need To Know About Taking Temp's?

 

[Rolex]

If the temp get high when the car is just idling, you need to richen the LSN. If, while idling it stays somewhere between 200 and 220, you're okay.
When running the car hard, and it gets too hot, you need to richen the HSN.
Each needle serves a different purpose. Some people just adjust the HSN when it runs too hot, and that affects top end only, but will not correct the problem if the LSN is too lean.
I don't know the best temp for that particular engine, but most engines are still safe under 280.
Your HSN needs to be adjusted for performance according to outside temp and humidity.
The LSN, as long as it has good pick up from a stand still, is fine in any temp or humidity.
To richen, turn left, or counterclockwise, like a water faucet handle. To lean it, turn it to the right. Don't turn more than 1/16th at a time, then test it. If it got worse, turn it 1/8th the other way.
Tune by ear and performance. When it's running good, check the temp.

 

[ToRqUe]

What Rolex said was Right but, I do it this way

First get the Mad Force (i love that name) running. Then start w/ Top-End performance by ajusting the HSN. The HSN is the overall flow 2 the engine and when u hit WOT. Once u get the HSN ajusted right evething else comes easy.
Then go 2 the Low-End the more take off u want the more u lean it out BUT not 2 much cause the truck will stall or run WAY TO HOT.....

( if the idle is gettin' 2 high that it is jumpin' into first gear during the high and low end tunnin' turn it down.)

After u do the low end do the pinch test. If u pass the pinch test then your set for your idle. the idle is simple get it as low as u can w/out the truck cuttin off......

U can use a temp. gun if u want 2 lean the truck out and get some more performance but i use my fingers. Personally i find it easyer and more accurate when using my finger and only use the temp. gun if i kno I'm runnin' @ WOT alot and pushing the truck hard........

(sry 4 the long post just trying 2 help and got caught up in my thinking)

 

[bOOm]

I would like to clear this up:
In NO WAY are your fingers more accurate then a temperature gun.
Use the temp. gun. What one's interpritation of what is hotter and cooler can be different than someone else's.

 

[vbgagnon]

I have to agree with bOOm your fingers are not in any way thermometers use a temp gun!

 

[RatzoRC]

If you don't have a temp gun, and want to check for temp, use the water drop test.
Take a drop of water, and put it on the heat sink.
If it sizzels, and dissapates right away, your too hot.
If it hangs on there for a few seconds and then evaporates, you good.
The truck will naturally run hotter when your running it hard.
As for Rolex's comment that 280 degrees or lower, I dissagree.
280 in my opinion is very hot for a .21 block.
Bigger engines should not get that hot.
220-240 is a better range for my liking.

 

[ToRqUe]

It works fine for me and mytruck wrongs strong so I'm happy

 

[RatzoRC]

Might not be the best method though. Do you agree?
I'm trying to give him the better methods.
Not a finger test that might work for you.
You should watch that if your engine ever gets into the 3 or 400 degree temp and you stick your finger to it, you may come back with less than you had.

 

[ToRqUe]

i take them buy fingers but sometimes i use the temp. gun 2 check behind my self or if I'm runnin hard. i ralely be wrong....

 

[RatzoRC]

Thats good for you. But not the best advice for a noob asking a temp question.
Just my 2 cents.

 

[ToRqUe]

ight, i get what u sayin'.

 

[Rolex]

As for Rolex's comment that 280 degrees or lower, I dissagree.
280 in my opinion is very hot for a .21 block.
Bigger engines should not get that hot.
220-240 is a better range for my liking.

Thanks for that info. I did mention that I wasn't sure about the temp for that particular engine, but based the 280 as maximum temp for a 2.5.

 

[RatzoRC]

Thanks for that info. I did mention that I wasn't sure about the temp for that particular engine, but based the 280 as maximum temp for a 2.5.

Yes you did mention that.
280 is even high for a .12, .15, or .18 I did see that you said MAX
They can withstand those temps, but would not suggest running that hot all the time.
250-270 is ok in my opinion, but maybe i'm not a hot runner. lol

 

[Rolex]

280 is the hottest it should ever be, but when I got it, the LHS said to keep it at 285.
I've since added an ACNCM monster cooling head and a MIP tuned pipe, and retuned it to rip at no more than 240. If I hit 260, I richen it up.

 

[flash]

from what i understand sometimes you can go slightly over 300F and still be ok. of course this is extremely rare, but when its over 100F and the humidity is really high some motors just wont run worth a crap until they get close to or maybe just over 300F.

a while back i pulled my car off the track to let my friend check the temp. with a surprised look on his head he yelled that it was 267F and quickly shut it off! it was blubbering ever so slightly and i was about to ask him to lean it just a tad, so when he pulled this little stunt i felt it was time to sit down and explain a few things.
#1 it was 98F and the humidity was in the 90's as well so 267F really wasn't as bad as he acted like it was.

#2 NEVER!...EVER! EVER! shut my car off unless i say to. the only time it gets shut down w/o my saying so is when its a runaway (which is unlikely and has never happened)

i see a lot of people saying that if the motor is too hot then the hsn/lsn should be richened up. dont forget to tune from rich to lean or tuning will be a pain. IF the motor gets hot then shut it off, richen it, and dont fire it again until it has cooled down completely. then re-tune it.

 

[ToRqUe]

Thank you flash, most of the people on this site dont agree w/ me that my friends OS 21 it over 300 and still was runnin strong....

 

[SkyMaxx]

LOL...two people speak up and that is most of the people on this site. I'd be very interested in the math behind that one.

There are a few engine manufacturers out there that have engines that run very well in the 290-340 range. Most notably amongst them would be TRAXXAS (their engines always run very hot unless you get an aftermarket cooling head) and Fantom (they actually state in their manual that temps above 300 are not unusual)

Most hobbyists agree that RC car/truck/buggy engines should be run with temps between 220-300. You will find that there are a ton of variables that can affect the run temps. Biggest amongst those would be your fuel's nitro content, the outside air temperature, humidity, your elevation (where you live or run the car), and how you have ventilated your body. From there it is all in the tuning.

I have seen my .21 engines (Ofna Hyper .21 8-port and RB Concepts S7 Europa) run very well with temps in excess of 280. I generally like to keep them a little lower to promote some longevity in the engine, but admit that I like nothing better than a screaming fast RC...helps me get the big air.

So, if your friend was running his engine and it's temps were over 300...and he had a healthy amount of bluish smoke from the exhaust...and it performed well without shutting itself down (via overheating), then he should be good to go. Just realize that some engines don't last long if continually run in that fashion.

 

[ToRqUe]

He knos.....He has been in the hobby 4 a about 10 years (way more than me) and he runs oddonell so the smoke wants blue'ish...also that fuel makes engines runa little hotter i....and his in on his 5 gallon kno....