<VV> Exhaust Crossovers

[airvair]

I once had such a piece of plumbing. Actually what it was was a "speed 
shop" part that was meant to "modify" a stock single exhaust into duals. 
It was only the left half and required that the "existing" stock exhaust 
be cut off under the bellhousing, then this new piece slid onto the 
stub, and mounted to the stock left manifold. A left side muffler could 
then be added. The result was a dual muffler setup, with an integral 
crossover. Slick!

-Mark C

UltraMonzaWest@aol.com wrote:

>Seat of the pants..it does help!   BUT..the best way to do it would be like a 
>63-83  Vette....the tubes out of the manifolds coming together [ siamesed ] 
>under the differential...making a 180  and out to the mufflers.....tight..I 
>know..
>
>  
>
>>This is pretty easy to do, I have one hanging in my garage that I welded up
>>for my current project motor.  I fit checked it, but have not run it, so I
>>don't know if there is a noticeable performance gain.  Some folks have
>>claimed noticeable improvement in low end torque, but I haven't seen any 
>>dyno
>>runs.  It will certainly sound better (whatever that means).
>>Any decent muffler shop should be able to run a tube between the two "U"
>>tubes for you.
>>
>>Roger Gault
>>
>>    
>>
>>>Is it possible and/or beneficial to install an exhaust crossover on a 140
>>>engine?  I would think it would have the potential to squeeze some HP out
>>>      
>>>
>>of
>>    
>>
>>>it, not sure.  Does anyone know if this would work?  Thanks in advance.
>>>      
>>>
>
>
>Matt Nall / Patiomatt / WCUH / Chairman V V
>69 Monza Cpe., 66 Monza vert, 65 Crown v8 Cpe.
>Somewhere between Reno, NV and Coos Bay, Or.