2 out VS 1 out exhaust, 914-6 |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
2 out VS 1 out exhaust, 914-6 |
patssle |
Aug 13 2010, 03:13 PM
Post
#1
|
Senior Member Group: Members Posts: 981 Joined: 28-August 09 From: Houston, TX Member No.: 10,741 Region Association: None |
Is there any major advantage over a 2 out vs 1 out exhaust for 914-6? Power or sound? Any reason to pick one over another?
|
pcar916 |
Aug 13 2010, 03:39 PM
Post
#2
|
Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None |
The sound is, IMHO, better out of a 2 in 2 out can. It also depends on whether or not your engine is big enough to produce too much back-pressure.
My 2.7L E spec motor worked great with a 2-in/2-out was too much for the 2-in / 1-out. My 3.6 won't work with either one. I thought about making a 2-in / 2-out with my own internal porting, but it was easier to use other solutions, like SuperTrapp or phase-9's... But then I don't mind the noise. |
DanT |
Aug 13 2010, 03:40 PM
Post
#3
|
Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
twin pipe..........beautiful sound.
twin pipe if properly executed..........better power. twin pipe.........looks great (IMG:style_emoticons/default/biggrin.gif) had a nice twin pipe on my 2.7RS 914-6 and loved every minute of it. now I have my '75 2.0L twin piped (IMG:style_emoticons/default/smile.gif) Attached image(s) |
whatabout1 |
Aug 13 2010, 03:53 PM
Post
#4
|
Toys in Red Group: Members Posts: 403 Joined: 6-March 06 From: Charlotte, NC Member No.: 5,676 Region Association: None |
Some twin out's can have a resonance at the mid range. Loud.
Dan, what are you running ? M&K GT3 ? |
DanT |
Aug 13 2010, 04:01 PM
Post
#5
|
Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
that is a custom made twin pipe on a stock 2.0L banana. 4 cylinder (IMG:style_emoticons/default/biggrin.gif) kind of rare (IMG:style_emoticons/default/smile.gif)
the one I had on my 6 was a partially gutted stock muffler with correctly placed twin pipes...there are several places to make the twin pipes exit. Some make it quieter, some make it louder, some give it a bit more torque...especially if the pipes are the correct length. |
patssle |
Aug 13 2010, 04:09 PM
Post
#6
|
Senior Member Group: Members Posts: 981 Joined: 28-August 09 From: Houston, TX Member No.: 10,741 Region Association: None |
|
BigD9146gt |
Aug 13 2010, 04:31 PM
Post
#7
|
OCD member Group: Members Posts: 376 Joined: 24-January 05 From: Sydney, Australia Member No.: 3,502 Region Association: Australia and New Zealand |
I don't have the equation, but you can calculate the proper exhaust size, both headers and muffler. I went with what was recommended by several people different sources that know what they were talking about, 1 5/8" headers. However, I was sold on the sound of the Dansk sport 2in2out from my boss' car.
|
jt914-6 |
Aug 13 2010, 04:45 PM
Post
#8
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
I'm using one in/one out X2.....although a crossover tube might help....3.0 six
|
Ericv1 |
Aug 13 2010, 04:58 PM
Post
#9
|
Member Group: Members Posts: 259 Joined: 30-December 07 From: Cincinnati, Ohio Member No.: 8,518 Region Association: Upper MidWest |
I just installed a Triad 2 in/ 2 out and it sounds awesome. Mine displacement was on the small side so it was recommended to go with
1 1/2 inch headers. |
Steve |
Aug 14 2010, 10:15 PM
Post
#10
|
914 Guru Group: Members Posts: 5,582 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
I have a stock Euro 3.2 and i tried the two in two out sport muffler and it was way to loud for my neighborhood. It sounded like someone was bouncing metal balls off of the neighbors garage across the street. I took my car for a spin and noticed better top end power, but took it off anyway and put the single exit Bursch turbo muffler back on. Much quieter. Sport muffler went back on ebay the next day. Since then I have heard of silencer inserts for the sport muffler that are removeable for track events. That might have been the way to go.
|
Justinp71 |
Aug 15 2010, 12:42 AM
Post
#11
|
Senior Member Group: Members Posts: 1,583 Joined: 11-October 04 From: Sacramento, CA Member No.: 2,922 Region Association: None |
I have the M&K 2in 2 out, It sounds great. But it resonates on the freeway and now most of the time I have the pass side capped and un cap it for events. Plus its more ... (IMG:style_emoticons/default/ph34r.gif) with one capped.
|
IronHillRestorations |
Aug 15 2010, 09:01 AM
Post
#12
|
I. I. R. C. Group: Members Posts: 6,717 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
You probably get more top end power with the two outlet, but 90% of them I've heard have annoying resonance in the cabin. A few of them would just wear you out as the worst resonance came at cruising RPM's.
For anything up to and including a STOCK 3.0 the stock Porsche banana muffler is hard to beat. You might loose a little on the top end, but a little bit of restriction helps the low end torque. Bigger and more open exhaust isn't always the best thing for the flat 6 engines, a little back pressure isn't a bad thing. |
patssle |
Aug 15 2010, 10:08 AM
Post
#13
|
Senior Member Group: Members Posts: 981 Joined: 28-August 09 From: Houston, TX Member No.: 10,741 Region Association: None |
Great, thanks guys! Looks like the stock muffler from the 911 will be the way to go.
|
Lo-Fi Version | Time is now: 11th May 2024 - 10:36 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |