R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 07-25-2009, 01:06 PM   #1
Tech Regular
 
davidg01234's Avatar
 
Join Date: Jun 2009
Posts: 385
Default Running rc in 100 degree weather

is it ok to run a nitro rc in 100 degree weather as long as the temps stay good?

What is an average running temp for a 8 scale buggy, to be exact a Force.28

Also to run in this kind of weather could you just richen it some and check the temp every now and then?
davidg01234 is offline   Reply With Quote
Old 07-25-2009, 01:12 PM   #2
Tech Adept
 
rc-mike's Avatar
 
Join Date: Feb 2009
Location: Dickson TN
Posts: 130
Default

In theory you actually would have to lean it out a little to keep the same tune but just tune it like you normally would. If you aren't comfortable tuning by sound/smoke/etc. then I would be sure to check the temps.
rc-mike is offline   Reply With Quote
Old 07-25-2009, 01:21 PM   #3
Tech Regular
 
davidg01234's Avatar
 
Join Date: Jun 2009
Posts: 385
Default

Quote:
Originally Posted by rc-mike View Post
In theory you actually would have to lean it out a little to keep the same tune but just tune it like you normally would. If you aren't comfortable tuning by sound/smoke/etc. then I would be sure to check the temps.
thanks, what is the average running temp
davidg01234 is offline   Reply With Quote
Old 07-25-2009, 01:24 PM   #4
Tech Lord
 
Join Date: Jul 2008
Location: Houston, TX
Posts: 11,530
Trader Rating: 21 (100%+)
Default

Have a little experience running at temps over 100F. If youre running 250F at 80F, expect to run 270F at 100F unless you do something about it. I use a bigger coolong head since I run this way most of the summer and I try to stay a touch rich. Engines are trx 2.5s and 3.3s and they tend to run hot anyway. Bigger cooling head helps that. Otherwise they would be too hot. I run mostly on the grass too which doesn't tend to help temps either.
Duster_360 is offline   Reply With Quote
Old 07-25-2009, 02:15 PM   #5
Tech Elite
 
Join Date: Aug 2006
Location: SOMEWHERE LUVIN ME SOME RC
Posts: 2,905
Trader Rating: 61 (100%+)
Default

colder glow plug
__________________
LATER COOKIE

TEAM REDS RACING ENGINES USA
TEAM PROLINE-RACING
TEAM RC AMERICA/XRAY/HUDY
zixxer is offline   Reply With Quote
Old 07-25-2009, 02:45 PM   #6
Tech Regular
 
davidg01234's Avatar
 
Join Date: Jun 2009
Posts: 385
Default

Quote:
Originally Posted by zixxer View Post
colder glow plug
what about a mcCoy
davidg01234 is offline   Reply With Quote
Old 07-26-2009, 07:05 PM   #7
Tech Initiate
 
crotty777's Avatar
 
Join Date: Jun 2009
Location: P-town, NV
Posts: 40
Trader Rating: 1 (100%+)
Default

I live in nevada and run all summer long outside temps can get to 120 there is nothing wrong with running the engine 270-280-290 as long as the tune is right. the temp of the engine dosent mean anything as long as u have it tuned right.
__________________
*Dialed RC Hobbies, Windwater RC, Kustom Kolors, HRP, Sweep Racing,
RC Concept*
crotty777 is offline   Reply With Quote
Old 07-26-2009, 09:11 PM   #8
Tech Master
 
omarwashington's Avatar
 
Join Date: Aug 2008
Location: Kenmore, WA
Posts: 1,088
Trader Rating: 2 (100%+)
Default

I've also hear that when the weather is hot to lean it out, I still dont understand that concept but I guess its correct.
__________________
RCCARS!
omarwashington is offline   Reply With Quote
Old 07-26-2009, 09:23 PM   #9
Tech Fanatic
 
unsp0ken's Avatar
 
Join Date: Feb 2007
Location: Fontana, CA
Posts: 769
Trader Rating: 24 (100%+)
Default

Quote:
Originally Posted by omarwashington View Post
I've also hear that when the weather is hot to lean it out, I still dont understand that concept but I guess its correct.
it's because when it's hot, the air is not as dense. having a tuned engine means you have the right air-to-fuel ratio. when it's hot, there's less air going into your engine so you need slightly less fuel also to maintain the ratio. therefore, you lean it out a bit.
unsp0ken is offline   Reply With Quote
Old 07-27-2009, 06:17 AM   #10
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by crotty777 View Post
I live in nevada and run all summer long outside temps can get to 120 there is nothing wrong with running the engine 270-280-290 as long as the tune is right. the temp of the engine dosent mean anything as long as u have it tuned right.
Running 270-280-290 degrees will shorten the life of your engine. Shoot for the 210-235 range. (under 200 will ALSO shorten the life of the engine!)
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 07-27-2009, 06:51 AM   #11
Tech Regular
 
elkman's Avatar
 
Join Date: Feb 2009
Location: Gresham Oregon
Posts: 359
Default This weekend

Outside air temps ran about 100F yesterday and I leaned the top end a little. I run a Houston-tuned JP and normally I run at 235F to 245. This Sunday I was running about 260F to 270F. It flamed out on me a couple of times, so did everyone else. I up-trimmed the idle at the engine and on the transmitter to help keep it from flaming out when it was idling. It was a difficult day.
__________________
"He's old enough to know what's right
But young enough not to choose it"
Neal Peart / Geddy Lee
****RUSH****
elkman is offline   Reply With Quote
Old 07-27-2009, 08:39 AM   #12
Tech Elite
 
Join Date: Jan 2003
Location: Canada
Posts: 2,175
Default

In hot weather things have to run hotter. Especially with the same plug. I use to race tune my engine around 230 at my home track. In 115 I was at 250. It was fine. It was new for me as at home I never run that hot. Every engine is different. You have to know what the engine likes and tune to smoke and sound. I can usually feel and hear what the engine wants and needs. It comes with experience. Best of Luck.

I need to try different plugs to see how that effects the temp and tune. Houston or someone else would have the answer to that question right away.
Chris Reilly is offline   Reply With Quote
Old 07-27-2009, 09:02 AM   #13
Tech Master
 
Join Date: Jul 2006
Location: Sugar Land, TX
Posts: 1,169
Trader Rating: 9 (100%+)
Default

There's more to it than just temp. Humidity and altitude are big factors too. An engine tuned in 100 deg heat in Phoenix won't be right at 100 deg in Houston or Florida. Tune your engine so it runs properly, esp. make sure the bottom end is rich enough. Then check temps to be sure they're ok. We run 6 months out of the year at 95+ deg and high humidity and my engines are never above 220-230. Some of that depends on your engine too though. My Extech rarely temps over 200 LOL.
cjtamu is offline   Reply With Quote
Old 07-27-2009, 09:07 AM   #14
Tech Elite
 
Join Date: Jan 2003
Location: Canada
Posts: 2,175
Default

My example is from 2 tracks 12 hours apart. FTR upper NY to Dirtburners St. Louis. Humidity, saturation ..........
Chris Reilly is offline   Reply With Quote
Old 07-27-2009, 02:51 PM   #15
Tech Adept
 
Join Date: Jan 2006
Posts: 187
Trader Rating: 8 (100%+)
Default engine tune

ya chris is correct other factors affect tune. and temp over 250 will lean and burn engine, i have not seen an engine run long after being that hot, have been through a few myself that way when i first started in r/c. all engine like certin temps go to web site of engine or blog's noting wheat other racers have had with temp's on that motor vspec like 250 all day long my jammin 28 like 225-240 anything over that leans crazy and flames out....
STEVE SACHUK is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Summer Rage Anyone? mafiaracers Northwest Racers 371 07-22-2008 05:13 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 04:17 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net