Re: Catalytic Convert Replacement

On Thu, 21 Aug 2008 22:03:01 -0500, Gordie wrote:

> On Mon, 18 Aug 2008 10:35:43 -0500, Mike Dobony wrote:
> 
>> On Fri, 15 Aug 2008 16:11:09 -0400, Shep wrote:
>> 
>>> The difference is like running one cat on a dual exhaust engine and no
>>> cat on the other, the slight difference in back pressure, will not
>>> cause a vibration, if this is what you mean.
>> 
>> 
>> Yes it will.  One bank with significant resistance followed by another
>> bank with little resistance will cause vibration.  With no cat there
>> will definitely be vibration.  With mismatched cats there will be
>> vibration. That is simple fluid dynamics.  The question is will the
>> difference in styles and sizes of cats make enough of a vibration to
>> significantly affect long term engine wear.  Since you reject basic
>> science your answer is totally invalid.  Go back to science class and
>> study basic fluid dynamics. Racers understand this and that is why they
>> go to great lengths to balance flow in intakes and exhaust, especially
>> in those high revving grand prix racers.
> 
> Well now, you have answered your own question haven't you?

Nope.  I still do not have an answer about the significance of the
imbalance.  The fact is any imbalance will affect longevity.  The question
is will it cause a significant decrease to the life of the engine.  And
now
it is a mote question.  I could not run around with the converter missing.
I had to get one to use the truck.  Good thing I did as the 35 mpg pickup
was stolen.  Now the suburban is both people hauler and construction
vehicle.