Exhaust x-pipe Design Question
06-16-2012 | 01:29 PM
#61
Rennlist Member
Joined: Dec 2010
Posts: 847
Likes: 6
From: Lafayette, La.
Wow, impressive. now I want it even more. I sent Charles an e-mail. Don't want to bother him on the weekend as I do not know him and I value my weekends. Will follow up with a phone call on Monday.
Thanks,
Stephen B
Thanks,
Stephen B
Stephen,
If you're still interested, talk to Charles. There may still be opportunties.
The first chart below shows the dyno run comparison of my car with a stock exhaust and with Charles' dual outlet X-pipe design. Note the gains are very significant across the entire rev range. At 6048 RPM, the gain is 27 hp. That's almost 10%. And there's nothing better than a broad, usable, mid-range gain.
The second chart below, which was a photograph from the display screen of the dyno, shows essentially that same comparison (stock in green vs. Charles' X-pipe in blue) but also shows a trace of my car with an AWE system (in red). Note that the AWE system is almost indistinguishable from stock. It has a few hp gain for a narrow range from about 5500-6000 RPM, but actually shows small losses at the low end relative to stock.
If you're still interested, talk to Charles. There may still be opportunties.
The first chart below shows the dyno run comparison of my car with a stock exhaust and with Charles' dual outlet X-pipe design. Note the gains are very significant across the entire rev range. At 6048 RPM, the gain is 27 hp. That's almost 10%. And there's nothing better than a broad, usable, mid-range gain.
The second chart below, which was a photograph from the display screen of the dyno, shows essentially that same comparison (stock in green vs. Charles' X-pipe in blue) but also shows a trace of my car with an AWE system (in red). Note that the AWE system is almost indistinguishable from stock. It has a few hp gain for a narrow range from about 5500-6000 RPM, but actually shows small losses at the low end relative to stock.
06-28-2012 | 03:21 AM
#65
Rennlist Member
Joined: Dec 2010
Posts: 847
Likes: 6
From: Lafayette, La.
I am so excited! I am on board for the build as well. Appreciate Charles for allowing one more on board. Now for the wait.....
Can't wait to see, hear, and read the reports of the first few exhausts that will be delivered.
Can't wait to see, hear, and read the reports of the first few exhausts that will be delivered.
07-10-2012 | 06:30 PM
#66
Pro
Joined: Jun 2001
Posts: 590
Likes: 8
From: Seattle
I ran with Charles' exhaust system this weekend. This is the dual outlet system-- essentially the same one that was dynoed a while back. Below is a shot of the car with his exhaust on it and an in-car video of a warm-up lap at the Ridge.
The car felt strong in every rev range, sounded nice, and was a blast to drive. This was my first outing in this car with that exhaust, the first time on that track, and the first time out in it since September of last year, in a car I haven't driven much yet. For all those reasons, my butt-dyno lost its calibration so I can't honestly compare it objectively to what I ran last (an AWE system). But it felt and sounded great, and the real dyno chart tells the story -- 27 hp gain at about 6000 RPM.
I used an external mic on the rear deck lid to capture the sound. I'm not sure how accurately that sound record is -- to me the exhaust pulses sounded better blended in person than in the recording. It could be that I was actually too close to the exhaust with that microphone. Realistically, this system is pretty loud at full song, but it's possible to keep the sound reasonable around town by keeping low throttle and revs. According to Charles, this entire system weighs 39 lb -- compared to 114 lb for the OEM exhaust, brackets, and hardware. And he said that when the whole thing is made of 321 stainless (a portion of it is mild steel in this prototype), it's total weight will likely be 33-34 lb.
The car felt strong in every rev range, sounded nice, and was a blast to drive. This was my first outing in this car with that exhaust, the first time on that track, and the first time out in it since September of last year, in a car I haven't driven much yet. For all those reasons, my butt-dyno lost its calibration so I can't honestly compare it objectively to what I ran last (an AWE system). But it felt and sounded great, and the real dyno chart tells the story -- 27 hp gain at about 6000 RPM.
I used an external mic on the rear deck lid to capture the sound. I'm not sure how accurately that sound record is -- to me the exhaust pulses sounded better blended in person than in the recording. It could be that I was actually too close to the exhaust with that microphone. Realistically, this system is pretty loud at full song, but it's possible to keep the sound reasonable around town by keeping low throttle and revs. According to Charles, this entire system weighs 39 lb -- compared to 114 lb for the OEM exhaust, brackets, and hardware. And he said that when the whole thing is made of 321 stainless (a portion of it is mild steel in this prototype), it's total weight will likely be 33-34 lb.
Last edited by Rob S; 07-20-2012 at 06:41 PM.
08-15-2012 | 05:24 PM
#70
Pro
Joined: Jun 2001
Posts: 590
Likes: 8
From: Seattle
I just checked in with Charles to see how he is coming. He said he's working hard on them right now - after having to wait 11 weeks to get the final 321 stainless bends from his supplier. He said he's trying to finish them as fast as he can, now that he has all the parts. Tonight, he's going to remove the prototype from my car, some of which was mocked up in mild steel, and he'll remake the mild steel section in stainless. As for completion date, you'll have to talk to him, but I can tell you that he's actively working on it.
I have only driven my car once with that exhuast, which I reported on a month or so ago. Someone else posted a video from that track day that just happened to catch my car -- and its sound. The link is below. My car first appears and can be heard at 13:48. A Mustang drives off the track in front of me at 15:00, and the exhuast can be heard again for a little while, especially after I accelerate away on the main straight. It will at least give you a sense of the sound from outside the car.
I have only driven my car once with that exhuast, which I reported on a month or so ago. Someone else posted a video from that track day that just happened to catch my car -- and its sound. The link is below. My car first appears and can be heard at 13:48. A Mustang drives off the track in front of me at 15:00, and the exhuast can be heard again for a little while, especially after I accelerate away on the main straight. It will at least give you a sense of the sound from outside the car.
