Frederic Breitwieser/turbo discussion

Tom Sharpe twsharpe at mtco.com
Thu Mar 18 02:44:45 GMT 1999



Gregory A. Parmer wrote:

> >On a V-6, whether it be 60, 90, flat, even or odd fire, don't you get nice
> >even every other pulse to a turbo when each bank has its own turbo?  I don't
> >see the need to cross over.
>
> I thought it was a self-equalizing measure...to insure that both sides
> of the engine were flowing similar amounts of air.  Isn't balance a
> good thing? Same would hold for any twin turbo arrangement feeding
> specific cylinders regardless of firing order or engine layout.
>
> One good guess deserves another,

Another guess... The pre-turbo exhaust system acts as a shock absorber/balancer
for exhaust pulses,,,, not too much restriction for the exhaust exiting the ports
and not too hard of a pulse at the turbin inlet.. Volume and length and tube size
and stepped and 4/2/1 etc all play a part...  Tom




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