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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: flat_six ()
Date: April 12, 2019 09:51AM

Hear the difference. Blue car is early muffler, maroon car is second design stock.

Turbo Sound

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: chris ()
Date: April 12, 2019 01:57PM

My dad told me that a lot of the hot rodders back in the day wanted the muffler from a turbo Corvair because it flowed good and was more stealthy than a lot of other performance mufflers.

'65 Monza 4 door
4 speed
110hp
Gardner, KS

Heart of America Corvair Owners Association

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: zarfnober ()
Date: April 12, 2019 03:12PM

The stock 65 muffler, at least the one sold by Clark’s as a repro, is exceptionally quiet, especially under boost. BUT.....it is pretty restrictive too; the inlet is 2-1/2” and once inside the muffler it tapers down to 2”. GM also designed them to produce backpressure to help limit boost levels. As for the muscle car guys using them, I remember a guy who worked for my dad that had an L-88 powered SS Chevelle that ran them, it sounded great, and was pretty darn quiet considering the power.

No muffler on my turbo, and it is not at all objectionable, and very quiet under boost.

Rocco

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: flat_six ()
Date: April 12, 2019 03:57PM

zarfnober Wrote:
-------------------------------------------------------
> The stock 65 muffler, at least the one sold by
> Clark’s as a repro, is exceptionally quiet,
> especially under boost. BUT.....it is pretty
> restrictive too; the inlet is 2-1/2” and once
> inside the muffler it tapers down to 2”. GM also
> designed them to produce backpressure to help
> limit boost levels. As for the muscle car guys
> using them, I remember a guy who worked for my dad
> that had an L-88 powered SS Chevelle that ran
> them, it sounded great, and was pretty darn quiet
> considering the power.
>
> No muffler on my turbo, and it is not at all
> objectionable, and very quiet under boost.
>
> Rocco

Boost was limited primarily by the carburetor. The muffler was very free flowing. I've taken my muffler off and only get another 1-2 psi of boost.

I'd like to know if the Clark's repro is identical to the original internally. It looks nice, but does it flow the same?

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: zarfnober ()
Date: April 12, 2019 07:29PM

Well, to be more technical, the boost was limited by the carb and the entire exhaust system for that matter. It was very easy to turbo the Vair, plenty of room for it, and cheap to produce exhaust parts, but the exhaust system is very restrictive. 1-2 more psi with the stock carb is pretty good for just removing the muffler. I think tests showed that they designed the exhaust to produce 15psi back pressure, in order to limit boost to 10 psi with a stock carb. Run a bigger carb, then pull the muffler and see how much more boost you make.

Will someone look at an original turbo muffler and see if it tapers to 2” inside?

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: American Mel ()
Date: April 12, 2019 08:00PM

50 plus years since production, and few of those guys still kicking around, it is really hard to know anything for sure.
I can't argue with our Turbo Experts who have hands-on experience with swapping out the carb for increased turbo boost pressures.
BUUUUUT, like Rocco, I have read in multiple Corvair sources that the "Original Corvair Turbo Muffler" was designed to have great flow characteristics, . . . . up to a certain CFM, and then it became rather restrictive from that point and up in order to keep boost under control.
Most "Turbo Mufflers" on the market today are variations of the BASIC Corvair design, but are NOT true turbo mufflers in the sense that they are built to the same specs as a CORVAIR Turbo Muffler.
I too would really like to see the internal dimensions of a FACTORY ORIGINAL Corvair Turbo Muffler.
After reading about the supposed built-in restriction at higher flows, I always wondered how this affected those old school hot-rodders that installed Corvair Turbo mufflers, and started the "Turbo Muffler" marketing craze!

.
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
'66 Monza Coupe - 4spd, 140 Daily driver beater
'67 Monza Vert. - PG, 140 Daily driver beater
'67 A/C Moredoor Monza - 140 4-spd. driver

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: Lane66m ()
Date: April 13, 2019 03:54AM

Anyone want a Corsa muffler 3869877. Evilbay has one. $300 + $22.17 ship

[www.ebay.com]

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: playerpage ()
Date: April 14, 2019 08:39AM

Great discussion!

I have been offered a NOS stock turbo from Al Lane (Lane66m) and I am buying it. When it arrives I will check the restriction inside as people have wondered about that. It's still in the original box so he doesn't know.

Eric C. Player
Porterville, CA
- National Member, CORSA
- Member: Central Coast CORSA & South Coast CORSA

THEN: 1967 Monza 110 Canary Yellow/1966 Corsa 180 Turbo, Red/
1965 Monza 110 Purple/1967 Monza 140 Red/1966 500 110 Black/1965 Monza 110 Camaro Yellow
NOW: 1966 Corsa 180 Turbo Coupe Blue. Blue/Beige interior.



"He cautioned me not to take notes. It would not have helped if I had, as he would start a paragraph with, 'It is therefore obvious. . .' and go on from there to matters which may have been obvious to him and God but to no one else." -- Daniel B. Davis

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: Lane66m ()
Date: April 14, 2019 06:55PM

Eric has purchased my NOS turbo muffler. Donna will be shipping out tomorrow morning while I take the truck to the body shop. If Eric gets the chrome tailpipe tomorrow from the source I found, he will have the stock system for under the eBay NOS muffler price.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: flat_six ()
Date: April 14, 2019 11:20PM

Lane66m Wrote:
-------------------------------------------------------
> Eric has purchased my NOS turbo muffler. Donna
> will be shipping out tomorrow morning while I take
> the truck to the body shop. If Eric gets the
> chrome tailpipe tomorrow from the source I found,
> he will have the stock system for under the eBay
> NOS muffler price.


He still needs a hanger and down pipe...

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: Lane66m ()
Date: April 15, 2019 02:02AM

I might have both. Will have to check later today.

Looked at Clark's catalog and I have both. My down pipe is ceramic coated though. I also have a inlet pipe that is ceramic coated for sale. Both previously listed in another discussion.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp





Edited 1 time(s). Last edit at 04/15/2019 02:09AM by Lane66m.

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Re: Please Recommend a Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: larry202br ()
Date: April 15, 2019 05:18AM

chris Wrote:
-------------------------------------------------------
> My dad told me that a lot of the hot rodders back
> in the day wanted the muffler from a turbo Corvair
> because it flowed good and was more stealthy than
> a lot of other performance mufflers.

Being an old guy, I remember the same thing. We all wanted a Corvair turbo muffler.

1961 rampside with a 65 / 67 110 engine, car four speed.
1965 convertible
1966 Custom two door/four door

KC0SKX
Olathe, ks
HACOA

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: playerpage ()
Date: April 16, 2019 09:35AM

Okay, I missed something--

My down pipe is wrong, too? Or is the expectation just that removing and replacing the existing muffler won't leave enough pipe material to work with?

My current muffler hangs from the shroud, so I guess yeah, I need a hanger.

Eric C. Player
Porterville, CA
- National Member, CORSA
- Member: Central Coast CORSA & South Coast CORSA

THEN: 1967 Monza 110 Canary Yellow/1966 Corsa 180 Turbo, Red/
1965 Monza 110 Purple/1967 Monza 140 Red/1966 500 110 Black/1965 Monza 110 Camaro Yellow
NOW: 1966 Corsa 180 Turbo Coupe Blue. Blue/Beige interior.



"He cautioned me not to take notes. It would not have helped if I had, as he would start a paragraph with, 'It is therefore obvious. . .' and go on from there to matters which may have been obvious to him and God but to no one else." -- Daniel B. Davis

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: Lane66m ()
Date: April 16, 2019 09:47AM

Proper hanger for the muffler you just purchased is Clarks C255R. 2 bolts secure it to the front of the muffler. Hanger is mounted on stud and bolt on back of RH head and one bolt from RH side shroud. I just sent you a couple PMs on this and what brackets I had (none turbo muffler).

Did you get the right tailpipe for the muffler? You could possiblly clamp around the chrome tailpipe until you can get the right bracket down the road. Not sure since I never got that far.

[www.corvair.com]

Eric: I felt like the exhaust system was a never ending puzzle when I tried to figure out what I needed with what I had. Totally confusing with all the advice that was given of what will and will not work together. I finally sold the turbo Corsa as my time was needed on our Camaro.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp





Edited 1 time(s). Last edit at 04/16/2019 09:52AM by Lane66m.

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: flat_six ()
Date: April 16, 2019 05:11PM

playerpage Wrote:
-------------------------------------------------------
> Okay, I missed something--
>
> My down pipe is wrong, too? Or is the expectation
> just that removing and replacing the existing
> muffler won't leave enough pipe material to work
> with?
>
> My current muffler hangs from the shroud, so I
> guess yeah, I need a hanger.

I'd need to see a better picture of the lower part of your down pipe to help determine if its correct for the second design muffler.

The correct tailpipe is significantly longer (if you choose to use it).

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: joelsplace ()
Date: April 16, 2019 05:22PM

After re-reading this entire thread I can't believe everyone missed the obvious. Blue shrouds are much louder than the factory black.
I have a V8 Malibu with a 3" exhaust and Flowmaster. It's about as loud as I can take. It sets off car alarms in parking garages. My wife always comments how much she likes the car when we go somewhere in it.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: FOUND!! Muffler for Turbo 66 that performs but is QUIETconfused smiley
Posted by: flat_six ()
Date: April 16, 2019 05:51PM

joelsplace Wrote:
-------------------------------------------------------
> After re-reading this entire thread I can't
> believe everyone missed the obvious. Blue shrouds
> are much louder than the factory black.
> I have a V8 Malibu with a 3" exhaust and
> Flowmaster. It's about as loud as I can take. It
> sets off car alarms in parking garages. My wife
> always comments how much she likes the car when we
> go somewhere in it.


No no no. Blue is quiet like the sea and has a calming effect. That's why it's used in birthing rooms.

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