Go Back  R/C Tech Forums > General Forums > Nitro On-Road
.12 engine pipe to header gasket??? >

.12 engine pipe to header gasket???

.12 engine pipe to header gasket???

Reply

Old 11-16-2007, 01:50 PM
  #1  
Tech Elite
Thread Starter
iTrader: (84)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,976
Trader Rating: 84 (100%+)
Default .12 engine pipe to header gasket???

Can I use a .21 rear engine gasket for a gasket between the pipe header on a .12 engine?
lil-bump is offline  
Reply With Quote
Old 11-16-2007, 02:13 PM
  #2  
Tech Elite
iTrader: (7)
 
Derby Bros Racing's Avatar
 
Join Date: Nov 2003
Location: Arizona
Posts: 3,209
Trader Rating: 7 (100%+)
Default

Yes. Newer pipes use .21 size (big bore) gasket. Some old school one-piece pipes use .12 size .
Derby Bros Racing is offline  
Reply With Quote
Old 11-16-2007, 03:29 PM
  #3  
Tech Fanatic
 
Nexus Racing's Avatar
 
Join Date: May 2005
Posts: 848
Default

I've found that sometimes when you're using a gasket from a different mfg than the pipe, you'll need to trim the "lip" inside the .21 gasket with an x-acto to make the pipe and header still able to slide together.
Nexus Racing is offline  
Reply With Quote
Old 11-16-2007, 03:37 PM
  #4  
Tech Champion
iTrader: (3)
 
Team Kamikaze's Avatar
 
Join Date: Apr 2006
Location: 我的名字是沈先生。我是中国人, 居住美国
Posts: 8,868
Trader Rating: 3 (100%+)
Default

Originally Posted by Nexus Racing View Post
I've found that sometimes when you're using a gasket from a different mfg than the pipe, you'll need to trim the "lip" inside the .21 gasket with an x-acto to make the pipe and header still able to slide together.
You can also do this: Instead of trimming the inside lip of the seal/gasket, just use the PICCO .21 exhaust seal/gasket, the Picco seal/gasket does not have a lip on the inner side.
Team Kamikaze is offline  
Reply With Quote
Old 11-16-2007, 07:55 PM
  #5  
Tech Initiate
 
Garaski's Avatar
 
Join Date: Aug 2007
Posts: 39
Default

totally different topic but an engine question(s)..... when do you add head shims ? how many do you add ? what do you guys look for ?
Garaski is offline  
Reply With Quote
Old 11-16-2007, 08:01 PM
  #6  
Tech Champion
iTrader: (3)
 
Team Kamikaze's Avatar
 
Join Date: Apr 2006
Location: 我的名字是沈先生。我是中国人, 居住美国
Posts: 8,868
Trader Rating: 3 (100%+)
Default

Originally Posted by Garaski View Post
totally different topic but an engine question(s)..... when do you add head shims ? how many do you add ? what do you guys look for ?
It depends on what engine you are running the nitro percentage you use and the altitude.
Team Kamikaze is offline  
Reply With Quote
Old 11-16-2007, 08:24 PM
  #7  
Tech Elite
Thread Starter
iTrader: (84)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,976
Trader Rating: 84 (100%+)
Default

Originally Posted by Garaski View Post
nova engine..... 25% nitro ...... #6 - #7 plug ..... what should I look for inside the engine to make me want to add headshims and how many should I use ? thanks.
I can comment on only .12 size engines. You want to check the top of the piston and burn room for detenation. It will look like the top of your piston has been sandblasted. This is bad you need to add shims. do a search in the nitro engine forum there is a ton of information on this subject.
lil-bump is offline  
Reply With Quote
Old 11-16-2007, 08:25 PM
  #8  
Tech Initiate
 
Garaski's Avatar
 
Join Date: Aug 2007
Posts: 39
Default

nova engine..... 25% nitro ...... #6 - #7 plug ..... what should I look for inside the engine to make me want to add headshims and how many should I use ? thanks.
Garaski is offline  
Reply With Quote
Old 11-16-2007, 08:26 PM
  #9  
Tech Elite
Thread Starter
iTrader: (84)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,976
Trader Rating: 84 (100%+)
Default

Originally Posted by Garaski View Post
totally different topic but an engine question(s)..... when do you add head shims ? how many do you add ? what do you guys look for ?

For 20% I shim around .45mm, 25% around .55mm 30% around .65mm. Like Team K said It depends on what % nitro you use
lil-bump is offline  
Reply With Quote
Old 11-17-2007, 09:16 AM
  #10  
Tech Elite
Thread Starter
iTrader: (84)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,976
Trader Rating: 84 (100%+)
Default

Thanks for the replies
lil-bump is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Terms of Service