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914World.com _ 914World Garage _ Center Outlet Exhaust
Posted by: Racer Chris Feb 21 2006, 08:44 AM
A customer has asked me about making one of my Stage II EVO systems with a center outlet instead of in the stock location. I am pretty sure I can do this nicely with a few key alterations to the muffler layout. It will allow the muffler to be centered in the back instead of offset to the left side.
What do you think?
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Posted by: spare time toys Feb 21 2006, 08:46 AM
Look at the Ailen photos 
I was going to do this also.
Posted by: URY914 Feb 21 2006, 08:48 AM
Wouldn't it be kinda low to miss the tranny or do you bend the pipe aft of the tranny to exit at the center.?
I like it. 
Posted by: 9magazine Feb 21 2006, 09:03 AM
Chris,
If it works I want one for 9 Magazine's 914 Project car!
Brian Minson
9 Magazine
http://www.9magazine.com
Posted by: Pnambic Feb 21 2006, 09:04 AM
Some mufflers have a center exit with a pipe extending the tailpipe to the side.
I like the idea. The PO of my car did something similar by editing the tail pipe after the muffler. Its not quite perfectly centered, but pretty darn close.
I'm sure anything Chris puts together will be leagues better than this, but http://www.914world.com/bbs2/uploads/blog-1130562305.jpg
Not quite as nice looking as a Boxster...haha...maybe someday.
Posted by: johnmhudson111 Feb 21 2006, 09:18 AM
Do a twin pipes similar to the Boxster S, that would look sweet....
Posted by: rick 918-S Feb 21 2006, 10:57 AM
This is what I did. I'm re-doing my system completely this year. It's too restrictive. I'm still going for the center exhaust, (same mufflers facing each other) but I will get mufflers with larger inlets, and large duel outlets. I will use one of the outlets as a cross-over or balance pipe and the other as a combo center outlet. (larger, of course) I plan on adding tubes on both sides of the straight exhaust section for a heat exchanger too. I think there's room. I'm also going to use all mandrel bent curved sections
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Posted by: jsteele22 Feb 21 2006, 11:34 AM
So far all the comments are positive. To me, those center exhausts look too much like a sphincter. But hey, to each his own.....
Posted by: Racer Chris Feb 21 2006, 09:28 PM
Thanks for all the comments.
I was thinking a Boxster oval would be nice, and I thought about twin tips like a Cayman S too.
I don't have much room to work with so it will probably be a 2 1/2" polished stainless round tip cut on a slant.
Posted by: Hammy Feb 21 2006, 09:42 PM
I think it'd be cool.. Twin tips though.
Posted by: Maltese Falcon Feb 21 2006, 11:30 PM
I've always liked the center tips idea. The older 356 Carreras and 550s had them--called Peashooters.
The 935s used them, as did I on the black biturbo. The F40 Ferrari had em too, and now the 986 and Cayman.
Mig welder and mandrel bender= No limits 
Marty
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Posted by: Maltese Falcon Feb 21 2006, 11:31 PM
...and
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Posted by: JmuRiz Feb 22 2006, 09:43 AM
Sheesh Marty, quit posting pics of that slow POS already, haha.
I noticed you have a 3'rd pipe, like the F40 had, is that for something with the turbos?
Posted by: Eric_Shea Feb 22 2006, 10:05 AM
I think that's the way they should have been from the factory... in the spirit of mid-engine Porscheees that came before them.
Rocking idea.
Posted by: Maltese Falcon Feb 22 2006, 11:36 PM
Nathan, that's exactly what the smaller center tube is for. I bring the excess exhaust out of the wastegate, down around the transaxle, and dump it to atmosphere in between the other 2.
It's pretty slow...for a jet.
Marty
Posted by: Racer Chris Feb 23 2006, 06:11 AM
Well, I guess I have to go with twin tips. 
I'll post pics in a couple of weeks once I've made some progress.
Posted by: Eric_Shea Feb 23 2006, 10:19 AM
Start collecting rear valances to mod and sell as a package welder-man.
Posted by: Jake Raby Feb 23 2006, 10:26 AM
| QUOTE (Racer Chris @ Feb 21 2006, 06:44 AM) |
| A customer has asked me about making one of my Stage II EVO systems with a center outlet instead of in the stock location. |
That same "customer" is the guy that has 202 RAT ponies to unleash.....(2316cc)
His Kerry Hunter certainly was not up to the task.
Chris, the center outlet has been asked about many times by my customers, people like the look- especially the 356 guys!
Posted by: davec Feb 23 2006, 10:36 AM
If it has to be in the sphincter section, at least make it a twin!
BYW, Maltese Falcon, what wing is that on your car? PM me if you have any details. DaveC
Posted by: Gustl Feb 23 2006, 11:10 AM
this one is from Bavaria / Germany
Gustl
Posted by: boxstr Feb 23 2006, 11:37 AM
V8
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Posted by: Racer Chris Mar 12 2006, 12:40 PM
Here's a sneak peek at what I came up with.
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Posted by: Racer Chris Mar 12 2006, 12:41 PM
and
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Posted by: Racer Chris Mar 12 2006, 12:42 PM
another view
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Posted by: Racer Chris Mar 12 2006, 12:43 PM
last one
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Posted by: Rotten Robby Mar 12 2006, 12:56 PM
| QUOTE (Racer Chris @ Mar 12 2006, 10:43 AM) |
| last one |
Chris,
This look is very much like the Dansk Sport mufflers that they make for the Boxster. I have one on my Boxster. Dansk is Porsches OEM manufacturer. Nice look. Not for me though. But I do want all of your other bells and whistles.
You wouldn't happen to have a sound file of your street muffler?
Posted by: Racer Chris Mar 12 2006, 01:15 PM
| QUOTE (Rotten Robby @ Mar 12 2006, 01:56 PM) |
| You wouldn't happen to have a sound file of your street muffler? |
Rob,
Sorry, I don't have a sound file.
I built a system for a (somewhat) local customer last summer but he hasn't even installed the engine in his car yet and my street car is between engines.
I had one on my race car while at a chassis dyno once last year but didn't think to bring along a sound recording device. It would have been a perfect opportunity for a direct comparison between the Stage I & II silencers.
Posted by: olav Mar 12 2006, 01:15 PM
| QUOTE (Gustl @ Feb 23 2006, 09:10 AM) |
| this one is from Bavaria / Germany Gustl |
Hey, that looks pretty cool.
A Boxster muffler on the 914/6?
I wonder how is sounds and if it robs any power from the engine.
What kind of headers are under there to accommodate the muffler?
I like the flared rear and flat front fender look.
Nice car.
Posted by: boboli914@att.net Mar 12 2006, 01:17 PM
Cool, I seen a aftermarket muffler last year that was a dual tip in the center. The guy said they only made it for the 2.0 
Posted by: Sideways Mar 12 2006, 05:06 PM
The Caymen rear muffler is an option, it is different to a Boxster in that it is two separate mufflers, joined to a single pipe then to the twin tips.....Just climed under one today......
Posted by: newto914s Mar 13 2006, 02:49 PM
I mean this in the nicest way possible, but I´ve always refered to the boxster as the car with the Butthole 
I´d go with dual tips
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