<VV> LM Exhaust System Upgrade

[Bill Elliott]

The u-pipes are smaller than 2", but many of us run 2" Walker Dynomax 
SuperTurbos or Flowmasters or similar) on stock u-pipes using a simple 
exhaust adapter (available at Pep Boys, Advance Auto, etc). Sound is 
great (very similar to the large Clarks extractors) but with some 
resonance around 3000 rpm.

No real reason to make larger u-pipes as the stock ones are not the most 
restrictive parts of the exhaust system and are more than sufficient for 
an otherwise stock engine.

One note: my recommendations are only for a manual transmission car. 
This setup on a PG car performs poorly and sounds "ratty".

Bill

OrchidEsquire at aol.com wrote:

>Hi:
> 
>Since acquiring my 66 Corsa Convertible in late September of last year I  
>have submitted several questions to VV regarding its restoration.  I  want to 
>thank VV and the members for their prompt responses and  helpful information. 
>Restoring the car has been as much fun as driving it. I  could not have done it 
>without help from my local Corvair Club and VV. 
> 
>My car has the 140 HP/4 carb. engine with dual exhausts. It is my  
>understanding that the exhaust system is constructed out of 2.0" OD piping.  Is that 
>correct? I was considering upgrading the entire system to 2.25" OD  piping and 
>installing 2 low restriction Turbo mufflers. Has anyone  done this before? Will 
>a 2.25" OD U-pipe fit on the stock exhaust  manifold?  Where can I get a new 
>correct size collar to mate the new  U-pipe to the stock exhaust manifold? What 
>are the  measurements of  the stock U-pipe in terms of its radius, and legs? 
> 
>Thanks,
> 
>Joel Roth 
>Ft Lauderdale, FL
>66 Corsa Convertible 
>_Orchidesquire at aol.com_ (mailto:Orchidesquire at aol.com) 
>
>  
>
>