Performance muffled 69 style sidepipes?
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 7,135
Likes: 168
From: banana republic
Performance muffled 69 style sidepipes?
I am changing from Hookers to 69 style, but I don't want the restrictive stock sidepipes. A bit loud is OK, but not like open pipes.
Yes I have done a search on this topic.
Where should I buy these?
Yes I have done a search on this topic.
Where should I buy these?
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 7,135
Likes: 168
From: banana republic
Team Owner
Joined: Jul 2004
Posts: 40,375
Likes: 788
From: Redondo Beach, California
Sweet Thunder fabricates factory look-alike sidepipe mufflers. You get your choice of tubbing size. They can duplicate the sidepipe mufflers in pipe sizes as large as 2 1/4 inches (maybe its 2 1/2 inches). I think the factory sidepipes were less than 2 inches in diameter. These should have a lot less HP loss. Also, since they make the sidepipe mufflers, I imagine they make them as free flowing as you want. They have a web site, so have a look.
I read somewhere that the factory sidepipe exhaust caused a 200 HP loss on a engine being run on a dyno.
I read somewhere that the factory sidepipe exhaust caused a 200 HP loss on a engine being run on a dyno.
Race Director
Joined: Jul 2004
Posts: 12,696
Likes: 329
From: Scottsdale Arizona
EDIT: I found it. The hyphen fooled me:
http://www.sweet-thunder.com/
Presumably they started with more than 190 HP.While I hadn't heard that the HP loss was 200, I have heard that they were very restrictive. More than any other aftermarket muffler.
Last edited by CA-Legal-Vette; Dec 27, 2007 at 02:17 PM.
Melting Slicks
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From: Bay Area CA
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Drifting
Joined: Feb 2005
Posts: 1,738
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From: San diego ca
Sweet Thunder fabricates factory look-alike sidepipe mufflers. You get your choice of tubbing size. They can duplicate the sidepipe mufflers in pipe sizes as large as 2 1/4 inches (maybe its 2 1/2 inches). I think the factory sidepipes were less than 2 inches in diameter. These should have a lot less HP loss. Also, since they make the sidepipe mufflers, I imagine they make them as free flowing as you want. They have a web site, so have a look.
I read somewhere that the factory sidepipe exhaust caused a 200 HP loss on a engine being run on a dyno.
I read somewhere that the factory sidepipe exhaust caused a 200 HP loss on a engine being run on a dyno.
Doesnt sound nearly as good though.
Melting Slicks
Joined: Jan 2003
Posts: 2,877
Likes: 13
From: Doha
St. Jude Donor '08
If you are worried about HP loss, then dont even think about having a factory style side pipes! .. I've tried both the stock muffler size and the over sized offered by sweet thunder, both caused a significant loss of engine's HP. I can estimate that to be more than %25 of original under body exhaust system. I think its possible to hide a hooker side pipes under the stock glass fiber covers and still preserve some engine's HPs.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
There is a forum member who fabricated 3" pipes to fit under stock GM '69 covers. I know that thread is archived, I'll see if I can find it.
Homemade 3" mandrel-bent side exhaust: http://forums.corvetteforum.com/show...517&forum_id=3
Cool shop-built setup: http://forums.corvetteforum.com/show....php?t=1536370
Thread with the pattern for the rear mounting tabs: http://forums.corvetteforum.com/show....php?t=1401989
Homemade 3" mandrel-bent side exhaust: http://forums.corvetteforum.com/show...517&forum_id=3
Cool shop-built setup: http://forums.corvetteforum.com/show....php?t=1536370
Thread with the pattern for the rear mounting tabs: http://forums.corvetteforum.com/show....php?t=1401989
Last edited by I'm Batman; Dec 28, 2007 at 12:03 AM.
Melting Slicks
Joined: Sep 2001
Posts: 2,501
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From: Sunshine State, USA
Senior Member
Cruise-In V Veteran
There is a forum member who fabricated 3" pipes to fit under stock GM '69 covers. I know that thread is archived, I'll see if I can find it.
Homemade 3" mandrel-bent side exhaust: http://forums.corvetteforum.com/show...517&forum_id=3
Cool shop-built setup: http://forums.corvetteforum.com/show....php?t=1536370
Thread with the pattern for the rear mounting tabs: http://forums.corvetteforum.com/show....php?t=1401989
Homemade 3" mandrel-bent side exhaust: http://forums.corvetteforum.com/show...517&forum_id=3
Cool shop-built setup: http://forums.corvetteforum.com/show....php?t=1536370
Thread with the pattern for the rear mounting tabs: http://forums.corvetteforum.com/show....php?t=1401989
Craig
