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Old 01-02-2012, 09:43 PM   #31
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As I read the posts I am a bit confused.
Why is this set up a new thought?
In August 2007 on my 997.1 yellow GT3 I had installed the FVD headers / 200 cell cats / elbow tubes and the STOCK center section (not a muffler but a resonator).
Removed the side mufflers which weighed 21 lbs each on the Champion Motorsport digital scales.
Never an issue with the stock center section to date. The current owner who's a great friend keeps me informed.
Also btw no power loss. Gained 22 rwhp.
Would post videos/pics but can not for the life of me make this forum be user friendly. Does not respond like any other forum.
Additionally I will not get into it b/c I'm done with it but I will never understand why all you guys wet your shorts over Akcrap.

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Old 01-02-2012, 09:43 PM   #32
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I think the cup exhaust is ideal, but it should work with ti final muffler provided it is a later ti one. Not sure what I got under warranty.
They updated the cup brackets too and they fixed the problem of them breaking on the cup cars.
Keeping stock headers and cats.

Appearantly you can tell from how they are welded. I will take it to orbit tomorrow and i am looking for a steel gt3 muffler to try to see if I like the sound and keep my brand new final ti exhaust in the box.

We should be done in time for Dyno day
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Old 01-02-2012, 10:32 PM   #33
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Quote:
Originally Posted by tcsracing1 View Post
I have the Fabspeed Side deletes.
But i have not used them to date other them using them with my sharkwerks bi-pass for total muffler delete

Im told the stock center muffler is not really designed to be a "solo" muffler and heat becomes an issue in the stock center if using side deletes....

Im going to give it a try this summer as the concept of dropping the two heaviest mufflers makes sense. A test if you will...

Any body have spare flanges that allow the stock center muffler to connect to the sides so i can give this a whirl??
I have misplaced my flanges as i never have used the stock mufflers since ownership.
(the side deletes require these flanges to mate to the stock center)
I think I have a set, send me PM
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Old 01-02-2012, 10:42 PM   #34
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Quote:
Originally Posted by Serge944 View Post
All the cup cars have this very configuration. If you've heard a late model 997 cup, they sound very good. Also, at low load, e.g. cruising on the freeway, the sound isn't very loud at all. Best of both worlds.

08- 997 cup muffler is about $1500 and the two elbows are $450 each from PMNA. You can fabricate your own elbows for a lot less though. They are just 90 degree bends with two flanges. Any good muffler shop can make it.

Click the image to open in full size.
Click the image to open in full size.
Does the cup rear exhaust have the same exhaust gas dispersion as the stock two side hole RS muffler......I do not think it does.
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Old 01-02-2012, 10:59 PM   #35
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Quote:
Originally Posted by Izzone View Post
Does the cup rear exhaust have the same exhaust gas dispersion as the stock two side hole RS muffler......I do not think it does.
It has similar dispersion, as there is a gap between the muffler outlet pipes and the J-pipes. Therefore, at high exhaust gas flow-rates (high rpm, high load), there is minimal muffling.
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Old 01-02-2012, 11:01 PM   #36
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Quote:
Originally Posted by Serge944 View Post
It has similar dispersion, as there is a gap between the muffler outlet pipes and the J-pipes. Therefore, at high exhaust gas flow-rates (high rpm, high load), there is minimal muffling.
Crazy question, does anyone have a cut away of both?
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Old 01-02-2012, 11:05 PM   #37
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Quote:
Originally Posted by deputydog95 View Post
Does it drone?
When cruising, you can comfortably hold a conversation. It's surprisingly bearable considering it's a race-car exhaust!

It'll drone if you lug the engine at low rpm in a high gear, but you're not supposed to be doing that anyways.
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Old 01-02-2012, 11:05 PM   #38
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I installed the Akrapovic Sports Cup on my .1 RS. It delivered the advertised weight savings of 46 lbs. It also seems slightly quieter than OEM with Sport Button on. If sound is important, most would say it doesn't sound as good as a bypass. I've not dynoed - Akra's claim of modest hp/torque increases above 3,300 rpm, and loss below makes sense.
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Old 01-02-2012, 11:07 PM   #39
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This is what you want....... Or there might be better.

http://tinyurl.com/7ny4dw8
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Old 01-02-2012, 11:12 PM   #40
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http://www.awe-tuning.com/products/p...t3exhaust.html

Check out AWE info on deleting side mufflers with stock
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Old 01-02-2012, 11:14 PM   #41
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Quote:
Originally Posted by Polarcharger View Post
I installed the Akrapovic Sports Cup on my .1 RS. It delivered the advertised weight savings of 46 lbs. It also seems slightly quieter than OEM with Sport Button on. If sound is important, most would say it doesn't sound as good as a bypass. I've not dynoed - Akra's claim of modest hp/torque increases above 3,300 rpm, and loss below makes sense.
This will be figured out next weekend. Stock exhaust is on my car and we will dyno then put Akra on car for same day dyno

Quieter is better, I have some sound restriction tracks for 2012

Bypass is good for cars and cafe, but I see no reason to keep the bulky side mufflers
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Old 01-02-2012, 11:19 PM   #42
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Here's the 997 GT3 cutaway. The CUP muffler is almost identical except the cup doesn't have the upper pipes.

That being said, I would venture to say that the the CUP and stock 997 center section should sound similar with J-pipes directly off the cats.

Click the image to open in full size.
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Old 01-02-2012, 11:23 PM   #43
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Quote:
Originally Posted by Serge944 View Post
Here's the 997 GT3 cutaway. The CUP muffler is almost identical except the cup doesn't have the upper pipes.

That being said, I would venture to say that the the CUP and stock 997 center section should sound similar.

Click the image to open in full size.
Your cup looks like no upper connection, so no pipe termination

I woudl like to see a cup cut away

Europipe posted cutaway pictures before, but I cant find it on search
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Old 01-02-2012, 11:26 PM   #44
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Funny thing with x-pipes, cross-overs and such. From WAY back in my small block chevy days you wanted the crossover at the point where the exhaust was the hottest spot off the headers (actually I did a paper on this back in grad school for CFD course). Pretty simple these days to figure out with a simple IR gun. Most vendors are not even close to optimal. Funny. But guess a little is better than nothing.
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Old 01-02-2012, 11:35 PM   #45
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Like I said, it's the same muffler, except it doesn't have the upper pipes past the perforated baffles. I had a pic but I think it's on my old phone.

Europipe's cutaway of the stock muffler:

Click the image to open in full size.
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Old 01-02-2012, 11:35 PM
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