<VV> 110 with Dual Exhausts

[Lacki, Allan V]

Hello Erich,

I have owned 95 hp and 110 hp Corvairs, and over the years, I adapted 140 dual exhaust pipes to low-horsepower heads three different ways:

1.   110 down-tubes to 110 manifolds to 140 U-pipes.

To do this, I had to ream out the holes in the U-pipe flanges so that the manifold studs could pass through them.  Not an elegant solution!  And I ran this setup for a couple of years with no leaks, I would imagine that it would be easy to blow out the manifold-to-U-pipe gaskets, as you have suggested.


2.   110 down-tubes to 140 manifolds to 140 U-pipes.

This solution also works, but it trades one problem for another that is potentially worse.  With this approach, there is a danger of blowing out the down-tube-to-manifold gaskets.  If this occurs, you will be asphyxiated when you turn your heater on!


3.   140 down-tubes to 140 manifolds to 140 U-pipes.

This solution is the most elegant, but you would have to have your cylinder heads machined to accept the wider-diameter 140 down-tubes.  Not really practical unless you are removing your cylinder heads for some other purpose.


Another Possibility:  A good muffler shop may be able to adapt the U-pipes so they accept the narrower-diameter 110 gaskets.  This may be the cheapest solution and possibly the best.

Al Lacki

--------------------------------------------------------------------------------

<VV> 110 with Dual Exhauts
eamsquared at comcast.net eamsquared at comcast.net 
Wed Aug 25 07:18:28 EDT 2010 

Previous message: <VV> Popularity 
Next message: <VV> Medical waivers - No Corvair 
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] 

--------------------------------------------------------------------------------



I have a 110 with PG and IECO (circa 1980) dual exhausts.  These dual exhausts are now sold by Clark's.  I also have a GM in the box set of 140 exhausts with all the hangers and hardware along with a set of 140 exhaust manifolds from Clark's. 



Is it possible to install the 140 exhaust manifolds on a 110 head?  What head/exhaust manifold gaskets are required and what are the dimensions?  Clark's sent me a set when I purchased the exhaust manifolds but I want to make sure they are correct.  I know that the 110 head exhaust diameter is about 1/16 inch smaller than the 140 head exhaust ports. 



I do not think that 140 mufflers can be successfully attached to 110 exhaust manifolds.  I'm told that this setup will burn out the head/muffler gaskets in a short time.  That is why I purchased to 140 exhaust manifolds. 



Any advise/experience and comments would be appreciated. 



Erich Meyer 

Bayshore Corvair



The information contained in this message is intended only for the personal and 
confidential use of the recipient(s) named above. If the reader of this message is 
not the intended recipient or an agent responsible for delivering it to the intended 
recipient, you are hereby notified that you have received this document in error 
and that any review, dissemination, distribution, or copying of this message is 
strictly prohibited. If you have received this communication in error, please notify 
us immediately, and delete the original message.