[DeTomaso] Ansa Baffles II

[F. & D. Terry]

Scott,

I probably require more flow area than a non supercharged engine. 
The way I see it, the exhaust system must be of a size capable of 
passing the expanded gasses the engine makes. These gasses are a 
function of the air and fuel that is introduced into the engine. 
Since a supercharger introduces more air, I would think more 
exhaust gasses are produced.

It's interesting to note, however, that with my first B&M 
supercharged engine there was a noticeable drop in power when I 
switched from Hall big bores to GTS ANSA mufflers. The drop in 
power seemed to be in the same rpm range as those who have written 
to this list with naturally aspirated engines.

With my present Eaton supercharged engine, I started with ANSA 
mufflers on the chassis dyno but everything went south at about 
4500 rpm. A friend pointed out the trouble to be the ANSA 
mufflers. I made a set of 2-1/2" pipes with free flowing mufflers 
and the problem went away.

Yes, I probably have different circumstances but it is interesting 
the rpm range where power falls off is very close to non 
supercharged engines.

Gutted ANSA mufflers will make more power than stock but I feel to 
get maximum power a free flowing muffler is the best way to do it. 
Unfortunately they increase the noise level too.

Fred T.

scott black wrote:
> Fred,
>    
>    
>   As you have a motor with forced induction, do you have different requirements than a normally aspirated motor?  I am just curious if you have a great neeed/less need for free flowing exhaust since it seems that turbo and supercharged motors are genterally quieter.  
>    
>   How does forced induction change things?  Does it matter?
> 
> Curious in Texas,
>   
> Scott  Black
>   
> 
> "F. & D. Terry" <gt5s at bcpl.net> wrote:
>   Will,
> 
> I posted something earlier about gutted ANSA mufflers and that 
> even though the baffles are removed a restriction still remains. 
> It has to do with a the protruding square edge of the inlet to the 
> two resonators that is very restrictive.
> 
> As far as the resonators go, I don't feel they are as restrictive 
> as you may think. Consider the sum of cross sectional area of the 
> two resonators compared to the cross sectional area of the exhaust 
> pipe. I no longer have a set to measure but suspect there is ample 
> area in the resonators.
> 
> I fabricated a set of 2-1/2" exhaust pipes with a cross sectional 
> area equal to two Pace Setter resonators with a 7/8" bore. I 
> intend to make the switch from my present pair of resonators at 
> 2-1/4" each. Unless I miss my guess, I shouldn't loose any power.
> 
> Fred T.
> 
> Will Demelo wrote:
> 
>>Can someone tell me how to remove the baffles in the ansa muffler tips? I've gutted the interiors, but it's still restricting the flow considerably.
>>Will D.
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