R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-06-2009, 04:11 PM   #1
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default hot pipe..cool head

i never experienced this but was racing today and noticed that my exaust was extremely hot but my cyl. head was at normal operating temp,
(i have novarossi 21-5k and novarossi 9886 exaust)
other than this it was running fine,any ideas?
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 04:13 PM   #2
Tech Addict
 
smb17's Avatar
 
Join Date: Jun 2008
Posts: 592
Trader Rating: 13 (100%+)
Send a message via AIM to smb17
Default

sounds alright to me. I am not sure what the problem is. Maybe more details will help?
__________________
-
smb17 is offline   Reply With Quote
Old 09-06-2009, 04:41 PM   #3
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

my pipe was extremely hot for my liking,i put a drop of spit on it and it sizzled like a frozen turkey in a deep fryer,did the same for the cylinder head and it barely sizzled or bubbled..warm-hot to the touch.
something just seems a little off to me but it was running fine so i dont know if im being over concerned about this.
mugen mbx5r buggy-engine has just under a gallon and the 9886 inline set about the same using byrons 20% gen2.
i also have a hyper 8.5 pro with the same motor/pipe combo and have not experienced this.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 05:02 PM   #4
Tech Master
 
Join Date: Jan 2006
Location: Virginia
Posts: 1,807
Trader Rating: 47 (100%+)
Default

How many head button shims are you running.
Try taking one of the thinnest head button shims
out. This will raise the head temp and lower the
pipe temp.
rageworks is offline   Reply With Quote
Old 09-06-2009, 05:23 PM   #5
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

i have the factory shims,2 aluminum with 1 copper in between.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 05:29 PM   #6
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,782
Trader Rating: 23 (100%+)
Default

The pipe is not a heatsink. It's aluminum but not finned so the head cools quickly, the pipe does not. Plus exhaust temps are always very high. Somewhere on youtube is a video of an F1 car without the bodywork being fired up at night. Just sitting there at idle and getting revved up occasionally it still turns the headers white hot.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 09-06-2009, 05:32 PM   #7
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,782
Trader Rating: 23 (100%+)
Default

Found it, now this is hot exhaust:

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 09-06-2009, 05:35 PM   #8
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

thanks wingracer.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 05:40 PM   #9
Tech Regular
 
deweyharding's Avatar
 
Join Date: Oct 2008
Posts: 496
Trader Rating: 39 (100%+)
Default tuned exhaust

http://www.youtube.com/watch?v=vA8ew6Gciqw
deweyharding is offline   Reply With Quote
Old 09-06-2009, 05:41 PM   #10
Tech Addict
 
smb17's Avatar
 
Join Date: Jun 2008
Posts: 592
Trader Rating: 13 (100%+)
Send a message via AIM to smb17
Default

GOD i love that noise.
__________________
-
smb17 is offline   Reply With Quote
Old 09-06-2009, 05:46 PM   #11
Tech Master
 
Join Date: Jan 2006
Location: Virginia
Posts: 1,807
Trader Rating: 47 (100%+)
Default

Check out Massivemods.com, Mark has info
on the site about the proper shimming of
nitro motors. He explains about running too
much head button shim for the nitro content
that is ran. It causes very high pipe temps
and low head temps. Bodies melting is also
a good sign of this condition.
rageworks is offline   Reply With Quote
Old 09-06-2009, 05:48 PM   #12
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

yea thats music to my ears!
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 05:55 PM   #13
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

Quote:
Originally Posted by rageworks View Post
Check out Massivemods.com, Mark has info
on the site about the proper shimming of
nitro motors. He explains about running too
much head button shim for the nitro content
that is ran. It causes very high pipe temps
and low head temps. Bodies melting is also
a good sign of this condition.
thanks for that link but i went there and couldnt find head shim/pipe temp info.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-06-2009, 06:02 PM   #14
Tech Master
 
Join Date: Jan 2006
Location: Virginia
Posts: 1,807
Trader Rating: 47 (100%+)
Default

Hey helivaguy, give Monty at Houston Engine Services
a shout. He is the Novarossi engine guru. His thread is
on pg.1 of this Off-Road Nitro section, or give him a call.
I think the info is in the modded motors section of the
MM site.
rageworks is offline   Reply With Quote
Old 09-06-2009, 06:14 PM   #15
Tech Master
 
Join Date: Jan 2006
Location: Virginia
Posts: 1,807
Trader Rating: 47 (100%+)
Default

http://www.massivemods.com.au/produc...roducts_id=192
I know the write-up is on the GO engines, but they
are designed after the Novarossi P5 and manufactured
in Tiawannie.
rageworks is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
New Hot Bodies Buggy!!??????? monsteraddict Nitro Off-Road 14489 03-18-2013 01:42 PM
os rg .21 what pipe yeaklet4 Nitro Off-Road 24 12-20-2008 08:24 PM
.12 tuned pipe questions... n.e.r.d Onroad Nitro Engine Zone 36 05-12-2007 12:56 PM
Engine Break-in and a leaking exhaust pipe gasket GP40X Rookie Zone 12 02-26-2003 05:02 AM



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 04:36 PM.


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