NEW Motordyne Exhaust, Titanium and Dual Setups!
#886
If it is the same case for the Sedan VQ, I will buy that in a heartbeat.
Maybe I am getting old, but even the "HKS rear seciton" drones too much for me.
Maybe I am getting old, but even the "HKS rear seciton" drones too much for me.
Hi Guys,
Here is the other set of prototypes I promised to post.
These are highly drone resistant, high flow, and sleeper quiet. Like stock.
What do you think? Yes, no, maybe? And of course, anything that goes into production will be a lot cleaner.
![](http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/Shockwave2/IMG_1442.jpg)
![](http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/Shockwave2/IMG_1444.jpg)
NOTE: THESE MUFFLERS ARE WIFE AND G.F. APPROVED.
.
Here is the other set of prototypes I promised to post.
These are highly drone resistant, high flow, and sleeper quiet. Like stock.
What do you think? Yes, no, maybe? And of course, anything that goes into production will be a lot cleaner.
![](http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/Shockwave2/IMG_1442.jpg)
![](http://i352.photobucket.com/albums/r347/Hydrofluoric_Acid/Shockwave2/IMG_1444.jpg)
NOTE: THESE MUFFLERS ARE WIFE AND G.F. APPROVED.
.
#887
OMG this would be perfect for me!!! Are you suggesting quiet but with optimum performance? If so, please make it for the sedan... will it still be quite with headers and hfc?
The reason I'm interested is because I draw way too much cop attention! The only reason I am loud is because thats the sacrifice for the performance of the parts I have.... I would love to be quiet with same performance.
The reason I'm interested is because I draw way too much cop attention! The only reason I am loud is because thats the sacrifice for the performance of the parts I have.... I would love to be quiet with same performance.
![Smilie](https://g35driver.com/forums/images/smilies/smile.gif)
#888
#889
OMG this would be perfect for me!!! Are you suggesting quiet but with optimum performance? If so, please make it for the sedan... will it still be quite with headers and hfc?
The reason I'm interested is because I draw way too much cop attention! The only reason I am loud is because thats the sacrifice for the performance of the parts I have.... I would love to be quiet with same performance.![Smilie](https://g35driver.com/forums/images/smilies/smile.gif)
The reason I'm interested is because I draw way too much cop attention! The only reason I am loud is because thats the sacrifice for the performance of the parts I have.... I would love to be quiet with same performance.
![Smilie](https://g35driver.com/forums/images/smilies/smile.gif)
Its way quieter than the Stillen dual exhaust. And yes, it has a lot less flow resistance than the Stillen Sedan exhaust too.
I know, I used to have a Stillen Sedan exhaust on my G back in 05.
#890
I presume there is a fine line between resistance causing back pressure, and creating scavenging... further, I imagine too much flow would lose scavenging effect?... Stillen seems to do a good job ~ I would be very interested in a comparo! Even if it is only equal in performance, if it is quite that's a big win! Obviously if it has better gains that's a huge win!
#891
#892
I'm no flow dynamics expert and certainly not a rocket scientist (so bare with me)... the issue of scavenging becomes a concern... less resistance wont mean sacrifice in scavenging right?
I presume there is a fine line between resistance causing back pressure, and creating scavenging... further, I imagine too much flow would lose scavenging effect?... Stillen seems to do a good job ~ I would be very interested in a comparo! Even if it is only equal in performance, if it is quite that's a big win! Obviously if it has better gains that's a huge win!
I presume there is a fine line between resistance causing back pressure, and creating scavenging... further, I imagine too much flow would lose scavenging effect?... Stillen seems to do a good job ~ I would be very interested in a comparo! Even if it is only equal in performance, if it is quite that's a big win! Obviously if it has better gains that's a huge win!
In this respect I would expect them to be fairly similar and they are both high flow up to the point of the muffler.
The difference comes in the mufflers of the Stillen and the MD.
I remember clearly the internals of the Stillen muffler. Back in 05 I couldn't take the drone any more so I cut the muffler off and put on some straight through magnaflows.
I became curious as to what was inside the Stillen muffler and sliced it open on the band saw.... I was surprised to find it had an internal single 2.5" sharp edge, raised orifice inlet.
The single 2.5" isn't so bad but its the sharp edge and raised orifice inlet that brings down the flow coefficient a lot.
I can't say exactly what this restriction will do on the dyno because I never specifically dynod it, but it isn't exactly optimal from a fluid dynamic point of view.
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
Last edited by Hydrazine; 11-11-2009 at 12:42 AM.
#894
#895
#896
#899
Lol
Both of your postings including mine..!! Lol.. I'm subcribed to this thread so I can find out when the TP's will be ready!! I currently have stock cats with a Stillen dual exhaust.. I was going to go hfc's but I think I may go test pipes.. Any suggestions please..?
Thanks in advance..!!
Alf
Thanks in advance..!!
Alf