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Tech Editor's Desk Projects, papers, writings, thoughts, musings of our technical editor Joe Padavano. To begin with, he will be making threads and can approve posts to it if he wishes. This can be changed in the future if it does not work out well.

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Old August 15th, 2012, 09:18 AM   #1
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Question 60 olds 394 dual exhaust

Hello I have a 1960 olds super 88 coupe,I wish to install dual exhaust on the car I already have the left hand side dual exhaust manifold. But I am having a difficult time finding pictures or diagrams of how the dual exhaust pipes run from the manifolds to the tailpipes. I have tried some local muffler shops and have had no luck. I need HELP.

Thank you
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Old August 15th, 2012, 04:17 PM   #2
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Hi Bill,
Well this will be interesting as I am going from single to twin as well. I've seen one post that mentions a block off plate so I'm going outside to have a closer look at the manifold set-up to see what the go is.
Good luck with yours.

John.
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Old August 15th, 2012, 05:19 PM   #3
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Hi John,
the block off plate you mention is fairly simple. On the single exhaust system if you follow the exhaust pipe from the driver,s side exhaust manifold you will find that it connects to the bottom of the passenger side or the right hand side manifold. You can either but or make a plate to block this off. I found that it was a little difficult ,however to locate the proper dual exhaust manifold for the driver,s side or the left hand side of the engine. Also the factory calls for no gasket between the exhaust manifold and the head therefore you should insure the exhaust manifold is decked or machine flat. That being said I have however found that exhaust manifold gaskets are available.
Good luck with your project.

Bill
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Old October 7th, 2012, 10:18 AM   #4
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Hi guys,

I'm not really current on all of the Olds stuff, But I have come across one of these elusive left hand factory dual exhaut manifolds. Its the one that exits out the back... Do you guys know how much its worth and do you have any resources for people looking to buy one? i'm sure you guys know more people that might be looking for this.

I have pics I can email if you would like.

tyson.chaplin@gmail.com

I'm willing to ship around the country if needed. Thanks guys for your help
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Old October 7th, 2012, 12:24 PM   #5
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Having managed a exhaust shop, I'm well aware of most loosing their abilities of intricate bending and/or using their imagination!
There was a book with complete sketches of exhaust systems going back to the mid-50's, only 5 years ago, by Goerlich, and came up to current years.
I had a computer disc.
Call around and ask independant shops if they have 'bending cards' and someone who knows how to use them.
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Old October 7th, 2012, 12:34 PM   #6
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Hello, I reproduce the exhaust Manifold block off plates for the 56-64 Oldsmobile 324 371 and 394 engines. I have both regular mild steel and Stainless ericsolds@sbcglobal.net
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Old October 14th, 2012, 08:35 AM   #7
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Re: 1960 olds 394 DUAL EXHAUST

Hello Everybody thankyou for the info on the conversion to dual exhaust, however I am still requiring some information. The left hand side exhaust manifold I have found two types, one dumps downward and little closer to the front of the engine than the stock single exhaust manifold and then one I just purchased from Tyson that dumps at the rear of the engine towards the rear of the car. If I could Just locate some pictures or diagrams of how the exhaust should run it would sure help.
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Old October 17th, 2012, 01:58 AM   #8
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Some shots of the right hand side, I'll get ones of the left soon but I am not sure they will be what you need my system is a single, but until I look who knows.
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File Type: jpg 006.jpg (55.2 KB, 60 views)
File Type: jpg 005.jpg (70.7 KB, 50 views)
File Type: jpg 009.jpg (67.2 KB, 47 views)
File Type: jpg 004.jpg (75.1 KB, 43 views)
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Old October 17th, 2012, 04:06 PM   #9
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I am trying to figure out the engine shown in the pics. My 60 Olds, with a 394 engine did not have anything on the valve covers, let alone an "Oldsmobile Rocket" logo?
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Old October 17th, 2012, 05:32 PM   #10
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I'm not sure how things are on a '60 but on the '61's the left hand manifold is the same for single or dual.

Below is a picture of a '61 with duals. The left side is pretty tricky. It's so tight of a bend that there needs to be a cut/union just aft of the starter.

My '61 originally had single exhaust. I did the block off plate on the right side then ordered the left side pipes from http://www.waldronexhaust.com/. All their bends were right on.


Click the image to open in full size.
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Old October 17th, 2012, 07:51 PM   #11
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Quote:
Originally Posted by D. Yaros View Post
I am trying to figure out the engine shown in the pics. My 60 Olds, with a 394 engine did not have anything on the valve covers, let alone an "Oldsmobile Rocket" logo?
Thats how I bought it, probably just put there to look pretty.
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Old October 18th, 2012, 04:20 AM   #12
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Thank you to all of you for trying to assist me, how ever I am still looking for a diagram or photo of the dual exhaust set up for a 1960 Olds 394 Super 88 Senic Coupe. The 1961 0lds from what I understand is a different style of frame and the left hand side exhaust manifold is also different. I am guessing that only 1959 and 1960 are the same.
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Old October 18th, 2012, 05:45 AM   #13
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I'll check some of my manuals to see if I can find a picture.

In the mean time here's a couple good discussions talking about the manifolds and other's experiences trying to go dual on the '59-'60:

http://classicoldsmobile.com/forums/...manifolds.html
http://classicoldsmobile.com/forums/...hangeover.html
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Old October 18th, 2012, 09:57 AM   #14
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Quote:
Originally Posted by 5998DownUnder View Post
Thats how I bought it, probably just put there to look pretty.
BTW. my '60 Olds came from the factory with dual exhaust. Alas, I sold the car back in 1968, or so, so cannot help with pics.
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Old October 18th, 2012, 10:24 AM   #15
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I looked through my manuals and couldn't find anything. However I did find some pretty good pictures here at this cool blog. Neat car: http://1960oldsmobiledynamic88.blogspot.com/

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
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Old October 18th, 2012, 12:09 PM   #16
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Tell me that all those parts are inside your house and thats not a fancy room in your garage, love to show the wife and tell her that its a world wide guy thing to keep car bits in the house.

You have put a lot of work in there getting that gear ready, impressive.
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Old October 31st, 2012, 10:29 PM   #17
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Looks like I'll go Waldrons for an old original system. They can send me what I want here to Australia and I can bolt it up myself. Does anyone have video - YouTube links to a Waldron system in action. Like to see/hear what I am getting. I have tried YouTube but can only get Mystangs, Corvettes, camero, GTO. Large Olds with the system would be great.
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Old October 31st, 2012, 11:40 PM   #18
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Quote:
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Looks like I'll go Waldrons for an old original system. They can send me what I want here to Australia and I can bolt it up myself. Does anyone have video - YouTube links to a Waldron system in action. Like to see/hear what I am getting. I have tried YouTube but can only get Mystangs, Corvettes, camero, GTO. Large Olds with the system would be great.
The install should be pretty straight forward. Like I say I had real good luck with their system for my '61. As a matter of fact I was just at their shop a couple weeks back. They're going to bend me a system for a '65 Chevelle I just picked up. The owner is pretty sharp and knew a lot of intricacies. And was very patient to make sure I was getting what I wanted.
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Old November 1st, 2012, 12:43 AM   #19
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426Hemi,
Did you go duals? and a rear muffler at all?
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Old November 1st, 2012, 06:13 AM   #20
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426Hemi,
Did you go duals? and a rear muffler at all?
On my '61 I went from single to duals. Basically I got all the pipes for the left hand side--the right hand single side pipes were in good shape. I was able to find an NOS GM resonator and muffler (rear) for both sides.

Strange side note here, on the '61's the right side pipes are larger than the left side pipes. This is from the manifold all the way to the little turn down tips on the stock mufflers. Something like 2-1/8" right and 2" left if I recall. Right side got the larger diameter no matter if it's single or dual.
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Old March 22nd, 2013, 08:55 PM   #21
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My 49 to 63 Olds parts book kinda skips over 1960. However, 59 should be pretty much the same.
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Old March 31st, 2013, 08:24 PM   #22
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KANTER PRODUCTS HAVE ALL PREFAB EXHAUST SYSTEMS FOR THE 59 and 60 dual system,it all bolts right on. and that blocking cap you need, you can make it your self . you can use your old flange to trace one out. save your money.both pipes go threw the frame just like the 59.
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Old April 1st, 2013, 11:13 AM   #23
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Wonder if Kanter has the same for a '62? Will have to check.

You are correct that the "blocking cap" is very easily fabricated.
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Old April 21st, 2013, 02:52 PM   #24
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I didn't know that someone made full exhaust systems for the full sized olds cars. I want to get one for my 62 starfire. I never heard of Waldrons before but seems like the place I need to order from. What kind of muffler did you pick out 426 Hemi for you 61 olds?
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Old April 21st, 2013, 02:52 PM
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