Izzone's Akrapovic install, Dyno and friends
#76
AWE did dyno testing using a stock rear muffler and deleting the sides as discussed in this thread
https://rennlist.com/forums/showthre...ferrerid=66440
See the website for dyno teting
http://www.awe-tuning.com/products/p...t3exhaust.html
The way the Akrapovic system works is even when the Akra rear muffler is used with their Evolution system the side mufflers are totally bypassed when in "sport" mode or valves are unplugged
A Porsche rear muffler is designed to be used with the sides. When the valves are "unplugged" or car is in sport mode some exhaust gas is dispersed into the side mufflers at all times. Both connections on the side mufflers are used in both modes
Akra and Porsche rear is apples to oranges. One is designed to be a single pass rear (Akra) the other is designed to have pressure drop before inlet (Porsche)
https://rennlist.com/forums/showthre...ferrerid=66440
See the website for dyno teting
http://www.awe-tuning.com/products/p...t3exhaust.html
The way the Akrapovic system works is even when the Akra rear muffler is used with their Evolution system the side mufflers are totally bypassed when in "sport" mode or valves are unplugged
A Porsche rear muffler is designed to be used with the sides. When the valves are "unplugged" or car is in sport mode some exhaust gas is dispersed into the side mufflers at all times. Both connections on the side mufflers are used in both modes
Akra and Porsche rear is apples to oranges. One is designed to be a single pass rear (Akra) the other is designed to have pressure drop before inlet (Porsche)
I do enjoy watching Randy spend more money on his exhaust than my daily driver is worth. I like living financially vicariously through my baller friends
#77
AWE did dyno testing using a stock rear muffler and deleting the sides as discussed in this thread
https://rennlist.com/forums/showthre...ferrerid=66440
See the website for dyno teting
http://www.awe-tuning.com/products/p...t3exhaust.html
The way the Akrapovic system works is even when the Akra rear muffler is used with their Evolution system the side mufflers are totally bypassed when in "sport" mode or valves are unplugged
A Porsche rear muffler is designed to be used with the sides. When the valves are "unplugged" or car is in sport mode some exhaust gas is dispersed into the side mufflers at all times. Both connections on the side mufflers are used in both modes
Akra and Porsche rear is apples to oranges. One is designed to be a single pass rear (Akra) the other is designed to have pressure drop before inlet (Porsche)
https://rennlist.com/forums/showthre...ferrerid=66440
See the website for dyno teting
http://www.awe-tuning.com/products/p...t3exhaust.html
The way the Akrapovic system works is even when the Akra rear muffler is used with their Evolution system the side mufflers are totally bypassed when in "sport" mode or valves are unplugged
A Porsche rear muffler is designed to be used with the sides. When the valves are "unplugged" or car is in sport mode some exhaust gas is dispersed into the side mufflers at all times. Both connections on the side mufflers are used in both modes
Akra and Porsche rear is apples to oranges. One is designed to be a single pass rear (Akra) the other is designed to have pressure drop before inlet (Porsche)
I do enjoy watching Randy spend more money on his exhaust than my daily driver is worth. I like living financially vicariously through my baller friends
Then concentrate on the exhaust
#78
#80
http://www.mhg-fahrzeugtechnik.de/si...mainframe.html
these guys make some custom fab exhausts. Maybe a whole cup system could be fab's custom styles.
If cheep is what your going for, then make some side elbows at any exhaust shop,
drop the side mufflers and have the top holes welded shut on your stock oem muffler ~ Then you have the bypass to go back to if you dont like it and ontop of all that it wouldnt cost a person very much at all to give it a go... call it a day on 50$ parts & labour and be happy you lost a bunch of weight. Supersprint makes the cheepest premade elbows, ready to go for $732 then order those little block offs and bamn your good to go. It is the most cost effective side muffler bypass
This thread is proof that it sounds great and does the trick. I just think at first you need to run it for 20odd miles for the ECU to adjust thats all.
porsche doesnt work with cheep.
these guys make some custom fab exhausts. Maybe a whole cup system could be fab's custom styles.
If cheep is what your going for, then make some side elbows at any exhaust shop,
drop the side mufflers and have the top holes welded shut on your stock oem muffler ~ Then you have the bypass to go back to if you dont like it and ontop of all that it wouldnt cost a person very much at all to give it a go... call it a day on 50$ parts & labour and be happy you lost a bunch of weight. Supersprint makes the cheepest premade elbows, ready to go for $732 then order those little block offs and bamn your good to go. It is the most cost effective side muffler bypass
This thread is proof that it sounds great and does the trick. I just think at first you need to run it for 20odd miles for the ECU to adjust thats all.
porsche doesnt work with cheep.
Last edited by lopro; 01-20-2012 at 06:03 AM.
#81
drone is no good.
love affair doesn't last long...
my car sounds great above 3000rpms, but drones below. in the last few years (along with djing in my youth) it has caused my ears to ring 24/7. ears can handle the volume at wot, it's the 'booming, all-encompassing basslines' of the drone that is the culprit.
on track there is no drone, street is where low revs are constantly used in traffic stop/go. i am close to putting stock exhaust back on.
love affair doesn't last long...
my car sounds great above 3000rpms, but drones below. in the last few years (along with djing in my youth) it has caused my ears to ring 24/7. ears can handle the volume at wot, it's the 'booming, all-encompassing basslines' of the drone that is the culprit.
on track there is no drone, street is where low revs are constantly used in traffic stop/go. i am close to putting stock exhaust back on.
I tried to live with it
Instead I just quit driving the car
#82
I drove my setup for a week now.
Bit of drone under 2500rpm.
But it is quieter above, less exciting then Sharky with cracked side mufler but better for phone calls.
Loud enough for track.
Bit of drone under 2500rpm.
But it is quieter above, less exciting then Sharky with cracked side mufler but better for phone calls.
Loud enough for track.
#83
I think today Im going to order the supersprint elbows and a FVD final muffler
http://www.fvd.de/us/en/Porsche-0/-/...tyle_Tips.html
http://www.supersprintna.com/product...arch_model/411
Does anyone think this would be a bad pairing?
Does anyone know where a fvd can be bought in Canada or US?
http://www.fvd.de/us/en/Porsche-0/-/...tyle_Tips.html
http://www.supersprintna.com/product...arch_model/411
Does anyone think this would be a bad pairing?
Does anyone know where a fvd can be bought in Canada or US?
Last edited by lopro; 01-20-2012 at 02:15 PM.
#85
Exhaust made essentially no power at he top and 6hp, 10 ft/lb through the midrange.
This was with zero time for ecu to adjust for our test
At the track this weekend it feels as if the car pulls harder, but not sure it's not just in my head
The exhaust has made me enjoy the car much more, the sound is livable and drone free
#86
in terms of bang for the buck, I think something with equal length headers feeding into side mufflers but with a rear muffler bypass would be great. The equal length headers and cat replacements would create power and the rear muffler delete would save weight. The akra is a great system, but their header design isn't really any different than stock.
#88
Details like this are important to gas flow (making power). A perfect example of quality where the average person has no idea to look for it. A race engine builder would pick up on in a heartbeat.
Goolgle "Exhaust Port Matching" if you want to learn.
#89
I thought we were not at the headers yet because IZZONES warrentee is not up and he cannot change them yet.
Are you sure savy thats not carbon build up on the bottom or left one?
the one runner your explaining has been casted and a pipe put into ~ wouldnt that be an area thats prone to cracking later on down the line and dont you think thats going to cause exhaust gas turbulance?
I re read this whole thread last night, we had been going back and forth with different options of exhaust setups while waiting for the dyno sheets, izzone and Trakcars setups with the benefits and drawbacks and I got the impression that they were unable to use the headers yet because of warentee issues. otherwise it would have opened up a new bag of worm interms of options.
Given all the info from post 1 does anyone else object to going with a fvd final muffler and supersprint side elbows to delete the side mufflers?
Are you sure savy thats not carbon build up on the bottom or left one?
the one runner your explaining has been casted and a pipe put into ~ wouldnt that be an area thats prone to cracking later on down the line and dont you think thats going to cause exhaust gas turbulance?
I re read this whole thread last night, we had been going back and forth with different options of exhaust setups while waiting for the dyno sheets, izzone and Trakcars setups with the benefits and drawbacks and I got the impression that they were unable to use the headers yet because of warentee issues. otherwise it would have opened up a new bag of worm interms of options.
Given all the info from post 1 does anyone else object to going with a fvd final muffler and supersprint side elbows to delete the side mufflers?
#90
I think today Im going to order the supersprint elbows and a FVD final muffler
http://www.fvd.de/us/en/Porsche-0/-/...tyle_Tips.html
http://www.supersprintna.com/product...arch_model/411
Does anyone think this would be a bad pairing?
Does anyone know where a fvd can be bought in Canada or US?
http://www.fvd.de/us/en/Porsche-0/-/...tyle_Tips.html
http://www.supersprintna.com/product...arch_model/411
Does anyone think this would be a bad pairing?
Does anyone know where a fvd can be bought in Canada or US?
you have PM.