R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-02-2010, 06:01 AM   #1
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default advice on new RC8T RS. Idle & Temp going crazy.

Hello everyone, My RC8T RS has what i believe is an air leak in its AE pro .28 engine. it idles at 250 and if you even look at the throttle funny it goes WOT.
I use Permatex Ultra copper to seal the base of the carb, backplate and fuel intake nipple. Any ideas?
Suavo is offline   Reply With Quote
Old 07-02-2010, 06:22 AM   #2
Tech Elite
 
MotoGod's Avatar
 
Join Date: Feb 2009
Location: Clayton, NC
Posts: 3,701
Trader Rating: 112 (100%+)
Send a message via AIM to MotoGod Send a message via Yahoo to MotoGod
Default

If you already sealed it...then your tune must just be WAY off. I would go back to factory settings and try again.
__________________
Scott Pouliot
Current Race Rigs: TLR 8ight 3.0/3.0E/3.0T/22/22-4
==============================================
Thanks to my 2015 Sponsors: LutzRC, RadioPost, AKA Tires, RC Addition Products, Nitro Pro Fuels
MotoGod is offline   Reply With Quote
Old 07-02-2010, 06:24 AM   #3
Suspended
 
Join Date: Dec 2009
Location: northern michigan
Posts: 7,916
Trader Rating: 202 (96%+)
Default

sounds like your low end needle needs to be turned counter clock wise a turn or two, if idle falls, adjust idle screw, go back to factory settings and give it a try
inferno13 is offline   Reply With Quote
Old 07-02-2010, 07:46 AM   #4
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default

i actually tried stock settings and low speed got better, but i still got some bad stuttering and high temps on idle. should the low speed and idle needles be sealed as well?
Suavo is offline   Reply With Quote
Old 07-02-2010, 07:48 AM   #5
Tech Elite
 
MotoGod's Avatar
 
Join Date: Feb 2009
Location: Clayton, NC
Posts: 3,701
Trader Rating: 112 (100%+)
Send a message via AIM to MotoGod Send a message via Yahoo to MotoGod
Default

I usually pull all the needles and put Green Slime on them and then re-install them. The HSN I yank the housing and seal the bottom of the brass upright to the carb body as well. Just as a precaution.
__________________
Scott Pouliot
Current Race Rigs: TLR 8ight 3.0/3.0E/3.0T/22/22-4
==============================================
Thanks to my 2015 Sponsors: LutzRC, RadioPost, AKA Tires, RC Addition Products, Nitro Pro Fuels
MotoGod is offline   Reply With Quote
Old 07-02-2010, 07:59 AM   #6
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default

I only have Teflon tape at the moment. Will that do until i can buy some Green Slime?
Suavo is offline   Reply With Quote
Old 07-02-2010, 08:02 AM   #7
Tech Elite
 
MotoGod's Avatar
 
Join Date: Feb 2009
Location: Clayton, NC
Posts: 3,701
Trader Rating: 112 (100%+)
Send a message via AIM to MotoGod Send a message via Yahoo to MotoGod
Default

I wouldn't use tape. If it breaks off and gets inside your carb...it will jam things up or worse it could get sucked into the engine. Might be safe...might not be. Have any light grease or anything? That's all Green Slime really is anyway ;-)
__________________
Scott Pouliot
Current Race Rigs: TLR 8ight 3.0/3.0E/3.0T/22/22-4
==============================================
Thanks to my 2015 Sponsors: LutzRC, RadioPost, AKA Tires, RC Addition Products, Nitro Pro Fuels
MotoGod is offline   Reply With Quote
Old 07-02-2010, 08:04 AM   #8
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default

i have some bearing grease. kind of thick but not to bad.
Suavo is offline   Reply With Quote
Old 07-02-2010, 08:06 AM   #9
Tech Elite
 
MotoGod's Avatar
 
Join Date: Feb 2009
Location: Clayton, NC
Posts: 3,701
Trader Rating: 112 (100%+)
Send a message via AIM to MotoGod Send a message via Yahoo to MotoGod
Default

Try it. Just use a VERY small amount. You don't need much on those needles.
__________________
Scott Pouliot
Current Race Rigs: TLR 8ight 3.0/3.0E/3.0T/22/22-4
==============================================
Thanks to my 2015 Sponsors: LutzRC, RadioPost, AKA Tires, RC Addition Products, Nitro Pro Fuels
MotoGod is offline   Reply With Quote
Old 07-02-2010, 08:07 AM   #10
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default

should it be applied to all needles including High and Mid
Suavo is offline   Reply With Quote
Old 07-02-2010, 08:26 AM   #11
Tech Elite
 
MotoGod's Avatar
 
Join Date: Feb 2009
Location: Clayton, NC
Posts: 3,701
Trader Rating: 112 (100%+)
Send a message via AIM to MotoGod Send a message via Yahoo to MotoGod
Default

I just do the high and Low. Mid I wouldn't touch in any way, shape, or form to be honest. lol
__________________
Scott Pouliot
Current Race Rigs: TLR 8ight 3.0/3.0E/3.0T/22/22-4
==============================================
Thanks to my 2015 Sponsors: LutzRC, RadioPost, AKA Tires, RC Addition Products, Nitro Pro Fuels
MotoGod is offline   Reply With Quote
Old 07-02-2010, 08:36 AM   #12
Tech Rookie
 
Join Date: Jun 2010
Location: Bronx NY
Posts: 13
Default

ok cool. i'll give it a try this afternoon and post the results. Thanks for all your help
Suavo is offline   Reply With Quote
Old 07-02-2010, 07:16 PM   #13
Tech Addict
 
Do-Over's Avatar
 
Join Date: Jun 2010
Location: O-H....I-O
Posts: 513
Default I have that truck

I have the same truck and mine came with a faulty tank that was sucking air I hear it is quite common check for air bubbles in the lines. Also, IMO unless your a pro. DONT touch the MSN.

Also, check your idle gap so you don't over lean your LSN. I'm fairly new but I've learned this much so far. Hope it helps!

Oh, forgot to add this. My engine(same as yours) runs between 235 and 245 all the time. Your temp might go down as the piston and sleeve start to wear in, alot of pinch causes heat.
Do-Over is offline   Reply With Quote
Old 07-03-2010, 12:02 AM   #14
JsK
Tech Master
 
JsK's Avatar
R/C Tech Elite Subscriber
 
Join Date: Aug 2009
Location: S.Oregon
Posts: 1,525
Trader Rating: 10 (100%+)
Default

The backing plate is leaking around the roto-start.
JsK is offline   Reply With Quote
Reply



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 12:22 PM.


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