Exhaust TECH Mufflers, Headers and Pipes Issues

          
Reply
 
Thread Tools Display Modes
  #1  
Old 01-11-2018, 04:46 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default '79 Firebird Exhaust Hanger

I will be replacing a blown header gasket soon and figure it's good time to try and get the mufflers tucked up tighter to the floor. My plan is to cut the tail pipe a few inches above the 90* upturn on the exit side of mufflers, then expand the upper section of the cut and slip fit the lower section (the section that has the 90*) essentially raising the exhaust (dual exhaust so same procedure for the other side).

My question is there a need for a hanger between header and tailpipe?

If yes, where and what type?

Note that my existing setup which has been has hangers using the front seat belt bolts but it creates some interior vibration which I'd like to get rid of.
Attached Thumbnails
Click image for larger version

Name:	Firebird Exhaust.JPG
Views:	194
Size:	78.3 KB
ID:	472338  

  #2  
Old 01-13-2018, 07:01 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

I have some of the rubber strap that bolt under the muffler clamp and then bolted to the floor pan kick up there where the back of the rear seat is.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #3  
Old 01-13-2018, 11:08 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Thanks Skip, do you have a pic of these straps?

  #4  
Old 01-14-2018, 07:16 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

Next weekend I'll be at the shop and try and get some-agility dog show this weekend.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #5  
Old 01-14-2018, 07:22 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Ok, a dog pic will do for know.

  #6  
Old 01-26-2018, 02:55 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Hey Skip, how did the dog show go? Any opportunity to take those exhaust hanger pics?

  #7  
Old 01-26-2018, 07:43 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

Had to ice here last week that messed things up. Houston city depts do not know how to deal with it and for sure drivers do not. I promise I'l get one!

Dog show good and bad one good run, one we dropped bars and went over the wrong jumps.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #8  
Old 01-26-2018, 09:47 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Yea well I live in the great white north and we get plenty of snowy, icy days yet most drivers still don’t know how to manage it.

No worries whenever you have the chance to post a pic of it, thanks.

  #9  
Old 01-28-2018, 09:15 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

Here are a few form the Camaro. I have similar ones on the 81. The 78 I modified some clamps and bracket up in the hump where a transverse muffler fits. Too tight to get pictures of the 78 I think there was a thread here awhile back on repop of the rubber brackets for up there.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #10  
Old 01-28-2018, 09:17 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

Hanger still in place on Camaro.
Attached Thumbnails
Click image for larger version

Name:	DSC_0016.jpg
Views:	132
Size:	39.7 KB
ID:	473855   Click image for larger version

Name:	DSC_0017.jpg
Views:	147
Size:	26.4 KB
ID:	473856   Click image for larger version

Name:	DSC_0018.jpg
Views:	153
Size:	32.5 KB
ID:	473857   Click image for larger version

Name:	DSC_0019.jpg
Views:	167
Size:	29.6 KB
ID:	473858  

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #11  
Old 01-28-2018, 09:33 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Thanks Skip.
Gonna try to find as spot to hang it from the muffler inlet side so its not visible when viewev from the back.

  #12  
Old 01-29-2018, 11:40 AM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

You can also tie it up in the hump where the transverse muffler would be. There are a pair of threaded holes(5/16) each side for that.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #13  
Old 01-29-2018, 02:08 PM
Formula jg Formula jg is offline
Chief Ponti-yacker
 
Join Date: Aug 2004
Posts: 820
Default

Never noticed, will take a closer look at this area as it may be a better location.
thx.

Reply


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

Forum Jump


All times are GMT -4. The time now is 05:25 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017