1969 Repro sidepipes question....
Thread Starter
Race Director
Joined: Aug 1999
Posts: 10,073
Likes: 1
From: Toronto
1969 Repro sidepipes question....
I am currently running 2.5 inch straight pipes through dynomax mufflers. If I go to the 2.25 '69 sidepipes, am I going to experience material performance losses? Or is the width of the pipe going to be offset by being able to run with no mufflers?
Thanks.
Thanks.
Burning Brakes
Joined: Mar 2002
Posts: 803
Likes: 0
From: South San Francisco CA
Re: 1969 Repro sidepipes question.... (SuperFast80)
Silly Boy! No mufflers indeed. What are you smoking? You will definitely need mufflers, if not for your own hearings sake...for everybody elses.
Team Owner
Joined: Jul 1999
Posts: 26,545
Likes: 46
From: Huntersville NC
Re: 1969 Repro sidepipes question.... (SuperFast80)
You will probably loose about 50 rwhp with the sidepipes, but you will LOOK so much faster and SOUND so much faster probably you wont even notice the loss of power!! :lol: :lol: MJ
Drifting
Joined: Nov 2001
Posts: 1,469
Likes: 6
From: 68 427 4.11s Roadster
Re: 1969 Repro sidepipes question.... (MNJack)
My first Vette-350 had aftermarket side pipes and later discovered no muffling, very loud. But very high torque braking.
My present-427 has factory pipes and was Very Loud. I cut the fronts off and stuffed insulation in the forward baffles. I saw no difference in performance. I didn't rattle windows though when I left home.
You can remove the mufflers on the aftermarkets if you wanted to- but not for the street.
The big benefit is the headers. Either, I think is about the same after this.
Stock sidepipes don't run with headers. They do have a shorter run but more bends. The entire side pipe is the muffler.
My present-427 has factory pipes and was Very Loud. I cut the fronts off and stuffed insulation in the forward baffles. I saw no difference in performance. I didn't rattle windows though when I left home.
You can remove the mufflers on the aftermarkets if you wanted to- but not for the street.
The big benefit is the headers. Either, I think is about the same after this.
Stock sidepipes don't run with headers. They do have a shorter run but more bends. The entire side pipe is the muffler.
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
Re: 1969 Repro sidepipes question.... (SuperFast80)
The repro sidepipes is a chambered exhaust system that runs the entire length of the side of the vette. The chambered exhaust is comprised of two pipes side-by-side with thin slits around them to allow gases to move between them, and with a cover that wraps around both of them. It does a real great job at muffling the sound compared to straight pipes. But, they are much louder than baffle type mufflers, and flow much better too.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: 1969 Repro sidepipes question.... (fontking1a)
Silly Boy! No mufflers indeed. What are you smoking? You will definitely need mufflers, if not for your own hearings sake...for everybody elses.
:cheers:
Olivier
Thread Starter
Race Director
Joined: Aug 1999
Posts: 10,073
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From: Toronto
Re: 1969 Repro sidepipes question.... (GrandSportC3)
So just so I know what everyone is saying:
1. Do NOT run straight w/ no baffles
2. There is a performance loss ( :confused: how much?)
[Modified by SuperFast80, 5:38 PM 7/28/2002]
1. Do NOT run straight w/ no baffles
2. There is a performance loss ( :confused: how much?)
[Modified by SuperFast80, 5:38 PM 7/28/2002]
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Le Mans Master
Joined: Jan 2000
Posts: 8,721
Likes: 108
From: Canada
Re: 1969 Repro sidepipes question.... (SuperFast80)
The loss occurs if you use the std. ramhorns. They can be modified to hook up with your existing headers by your muffler shop then there is only a small decrease that is negligable. If you were to use the ramhorns expect a 15 hp loss over what you have now, I looked into this at length last winter. Talked to the ppl at Sanderson and Stalh as well as a few other specialty exhaust co's in the US.
[Modified by gdh, 4:43 PM 7/28/2002]
[Modified by gdh, 4:43 PM 7/28/2002]
