[DeTomaso] [SCPOCA] Breathing Better - Part 3 [5 Attachments]

[bill gaino]

I run empty cans, 2 1/2 intermediate pipes, dual 2 inch outlet tips, GTS headers. It is free flow, but YOUR right... It sounds like an outboard boat motor.   Bill 1362

-----Original Message-----
>From: John Taphorn <jtaphorn at kingwoodcable.com>
>Sent: Jan 27, 2010 8:20 AM
>To: Tomas Gunnarsson <guson at home.se>, detomaso at realbig.com
>Subject: Re: [DeTomaso] [SCPOCA] Breathing Better - Part 3 [5 Attachments]
>
>Well, the consensus seems to be the sound w/o the baffles is unpleasant.
>
>The ID of the two resonator tips is ~ 1.5".  The area is about 3.53".  The 
>2.5" diameter exhaust pipe has an area of ~ 4.9" or a reduction in volume of 
>28%.
>
>Although it is more area than a single header tube.
>
>The world is full of compromises.
>
>JT
>
>
>----- Original Message ----- 
>From: "Tomas Gunnarsson" <guson at home.se>
>To: <detomaso at realbig.com>
>Sent: Wednesday, January 27, 2010 2:36 AM
>Subject: Re: [DeTomaso] [SCPOCA] Breathing Better - Part 3 [5 Attachments]
>
>
>> John,
>>
>> I predict a rather unpleasant sound from that mod. I've heard a car so 
>> modified and it's at the bottom of my sound list along with a car that had 
>> the muffler cans removed completely and had resonator tips only(!) 
>> attached to the pipes.
>>
>> Tomas
>>
>> ----- Original Message ----- 
>> From: "John Taphorn" <jtaphorn at kingwoodcable.com>
>> To: <MikeLDrew at aol.com>; <SCPOCA at yahoogroups.com>; <detomaso at realbig.com>
>> Sent: Wednesday, January 27, 2010 3:36 AM
>> Subject: Re: [DeTomaso] [SCPOCA] Breathing Better - Part 3 [5 Attachments]
>>
>>
>>> That is an interesting bit of news.  Initially, I thought - Darn it. 
>>> Then I realized the opportunity.  I still have those baffles in my 
>>> exhaust.  Aha, there is more power to be extracted from the 408!
>>>
>>> If one desired to remove the baffles from the chrome tips, does anyone 
>>> know of a process?
>>>
>>> Thanks
>>> JT
>>>  ----- Original Message ----- 
>>>  From: MikeLDrew at aol.com
>>>  To: jtaphorn at kingwoodcable.com ; SCPOCA at yahoogroups.com
>>>  Sent: Tuesday, January 26, 2010 1:07 AM
>>>  Subject: Re: [SCPOCA] Breathing Better - Part 3 [5 Attachments]
>>>
>>>
>>>  JT,
>>>
>>>  Beautiful work, BUT.
>>>
>>>  Dan Jones did dyno testing with my gutted GTS mufflers, and found 
>>> minimal improvements (only 12 hp after performing a version of the Space 
>>> City modification).
>>>
>>>  It turns out that the cork in the bottle, literally, is the four 
>>> resonator tips.  You enlarged the inlet to the muffler, but the outlet is 
>>> substantially smaller.  Use your higher college math and you can 
>>> calculate the area of the inlet pipe and the combined area of the two 
>>> outlets and you'll be shocked.
>>>
>>>  The factory Gr3 exhaust system featured empty, gutted cans, and chrome 
>>> tips with NO resonators inside.  I'm afraid that's the only way to make 
>>> the stock mufflers work properly.
>>>
>>>  Mike
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