Dundon Sport Headers/OAPs with Valve Controller
03-27-2023, 10:53 AM
#46
Instructor
FWIW, I did land on the JCR Headers last year, and have loved them, and moved onto the lightweight racepipe with cats and silencers with the manifolds. I found the Dundon to be over the top with their manifolds in terms of noise, compliance and to me....the ability to DD comfortable. With that said, to many people my existing setup will be too loud, and sometimes my wife isn't a fan with the windows all the way up. But the Dundon I felt forced me to get something specific, or I couldn't have x or y part because of the noise (as Avera stated earlier that he needed the back box, or couldn't go with the race pipe). The JCR for me is the goldilocks, and many people will run their manifolds with other systems, and I think a couple others have Dundon headers with a JCR valved/silenced exhaust. I think @enduro has that setup, but I could be wrong. I'll tag him and have him enter the chat too.
I had nothing but great experiences with Jonny too and in chatting with him over many months deciding on different options and waiting for some coating to come into play, he was always great about responding to emails and questions, and even after the fact of being a customer when he hasn't had anything to benefit from still. Jonny is top shelf imo.
I had nothing but great experiences with Jonny too and in chatting with him over many months deciding on different options and waiting for some coating to come into play, he was always great about responding to emails and questions, and even after the fact of being a customer when he hasn't had anything to benefit from still. Jonny is top shelf imo.
I forgot to ask you a very important question…I’ll add it to my list, thank you in advance for your help!
1. Did you ever experience the JCR exhaust manifolds (“headers”) and link pipes (OAPs) with cats with the factory rear box? This is the set up I’m most interested in.
2. Do you have a 718 GT4 or Spyder?
3. If and when you had the JCR exhaust manifolds (“headers”) and his link pipes (“OAP”) with cats (without the rear JCR Race Pipe yet)?
Were you able to talk on the phone when driving on the freeway or around city streets?
Thank you for your input!
03-27-2023, 10:56 AM
#47
Instructor
This all falls under the heading of 'subjective' and 'situational'
I have Dundon headers/OAPs with OEM rear box and, unlike @Alpha Ice experience, I do not find the setup too loud . . . it is VERY LOUD when you are aggressive with throttle and shift points, but I love it.
When I have the rare occasion to keep things 'tame' - such as cruising on freeway - all I have to do is throw it into PDK automatic mode and be reasonable with throttle. Under such restraint I can easily carry out a phone conversation.
Under most instances, however, I am in PDK manual mode and aggressive with shift points, and have no interest in talking on the phone.
Now that Dundon has announced availability for a rear box solution, all of this MIGHT go out the window with the complete exhaust system??? Personally, I do not care if the system is too loud to talk on the phone . . . as long as the drone is not insane.
Avera
I have Dundon headers/OAPs with OEM rear box and, unlike @Alpha Ice experience, I do not find the setup too loud . . . it is VERY LOUD when you are aggressive with throttle and shift points, but I love it.
When I have the rare occasion to keep things 'tame' - such as cruising on freeway - all I have to do is throw it into PDK automatic mode and be reasonable with throttle. Under such restraint I can easily carry out a phone conversation.
Under most instances, however, I am in PDK manual mode and aggressive with shift points, and have no interest in talking on the phone.
Now that Dundon has announced availability for a rear box solution, all of this MIGHT go out the window with the complete exhaust system??? Personally, I do not care if the system is too loud to talk on the phone . . . as long as the drone is not insane.
Avera
Hey there Avera! I was interested in @Alpha Ice ’s experience with only the JCR exhaust manifolds and catted link pipes because that’s the specific two components I’m currently looking at for my 718 Spyder. I can’t find a lot of user experience for daily driving with just that set up.
Thanks again for your input.
03-27-2023, 11:11 AM
#48
Burning Brakes
Thread Starter
@Avera
Hey there Avera! I was interested in @Alpha Ice ’s experience with only the JCR exhaust manifolds and catted link pipes because that’s the specific two components I’m currently looking at for my 718 Spyder. I can’t find a lot of user experience for daily driving with just that set up.
Thanks again for your input.
Hey there Avera! I was interested in @Alpha Ice ’s experience with only the JCR exhaust manifolds and catted link pipes because that’s the specific two components I’m currently looking at for my 718 Spyder. I can’t find a lot of user experience for daily driving with just that set up.
Thanks again for your input.
@Alpha Ice can chime in with his experience, but he did already confirm the Dundon components were too loud . . . suggesting the JCR components are not as loud
Avera
03-27-2023, 11:26 AM
#49
Instructor
Understood . . . I could be very wrong, but cannot imaging anything being any louder than the Dundon components.
@Alpha Ice can chime in with his experience, but he did already confirm the Dundon components were too loud . . . suggesting the JCR components are not as loud
Avera
@Alpha Ice can chime in with his experience, but he did already confirm the Dundon components were too loud . . . suggesting the JCR components are not as loud
Avera
True, but @Alpha Ice has a full JCR 3 component system now and was wondering if he can report on the volume topic when he only had the JCR headers and catted link pipes.
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Avera (03-27-2023)
03-27-2023, 12:26 PM
#50
Rennlist Member
New Muffler inbound, designed from a power and sound standpoint... quiet with valves closed and screaming with the valves opened! Had to get it all done for the RS, and then work backwards.... Thanks for sticking with us, there's a lot more going on to build a muffler vs a pipe...
03-27-2023, 02:29 PM
#51
Burning Brakes
Thread Starter
'Word on the street' is Dundon will offer both Ti and inconel 321 options . . . if memory serves me, Jamie or another Dundon rep had a video out a little while back talking about how they could destroy a Ti exhaust in a single track session due to heat generated.
So, if I were to guess the Ti exhaust will be VERY expensive; sound slightly better (higher pitched/wailing tone); and not suitable/recommended for track-focused enthusiasts. . . while the inconel 321 will be less expensive; not have quite the high pitched/wailing tone; and suited for track-focused enthusiasts.
I guess time will tell what is Dundon makes available, recommended application(s) and COST. Dundon does not produce anything short of superb . . . and the COST always reflects the quality. . . unfortunately, I have a feeling the rear box solution will be outside my personal pay grade
To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.
I guess the biggest question to be answered is whether Dundon will deliver the Holy Grail solution . . . LOUD (headers/OAPs) and amazing tone (rear box) without mind-boggling drone. I have said all along, it anyone could deliver it ALL, it would be Dundon. Cannot wait to 'hear' all the feedback.
Avera
So, if I were to guess the Ti exhaust will be VERY expensive; sound slightly better (higher pitched/wailing tone); and not suitable/recommended for track-focused enthusiasts. . . while the inconel 321 will be less expensive; not have quite the high pitched/wailing tone; and suited for track-focused enthusiasts.
I guess time will tell what is Dundon makes available, recommended application(s) and COST. Dundon does not produce anything short of superb . . . and the COST always reflects the quality. . . unfortunately, I have a feeling the rear box solution will be outside my personal pay grade
To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.I guess the biggest question to be answered is whether Dundon will deliver the Holy Grail solution . . . LOUD (headers/OAPs) and amazing tone (rear box) without mind-boggling drone. I have said all along, it anyone could deliver it ALL, it would be Dundon. Cannot wait to 'hear' all the feedback.
Avera
03-27-2023, 02:58 PM
#52
Rennlist Member
I guess time will tell what is Dundon makes available, recommended application(s) and COST. Dundon does not produce anything short of superb . . . and the COST always reflects the quality. . . unfortunately, I have a feeling the rear box solution will be outside my personal pay grade To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.
Avera
To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.Avera
, or perhaps a "GoFundMe" page needs to be started
.
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Avera (03-27-2023)
03-27-2023, 03:22 PM
#53
Rennlist Member
'Word on the street' is Dundon will offer both Ti and inconel 321 options . . . if memory serves me, Jamie or another Dundon rep had a video out a little while back talking about how they could destroy a Ti exhaust in a single track session due to heat generated.
So, if I were to guess the Ti exhaust will be VERY expensive; sound slightly better (higher pitched/wailing tone); and not suitable/recommended for track-focused enthusiasts. . . while the inconel 321 will be less expensive; not have quite the high pitched/wailing tone; and suited for track-focused enthusiasts.
I guess time will tell what is Dundon makes available, recommended application(s) and COST. Dundon does not produce anything short of superb . . . and the COST always reflects the quality. . . unfortunately, I have a feeling the rear box solution will be outside my personal pay grade To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.
I guess the biggest question to be answered is whether Dundon will deliver the Holy Grail solution . . . LOUD (headers/OAPs) and amazing tone (rear box) without mind-boggling drone. I have said all along, it anyone could deliver it ALL, it would be Dundon. Cannot wait to 'hear' all the feedback.
Avera
So, if I were to guess the Ti exhaust will be VERY expensive; sound slightly better (higher pitched/wailing tone); and not suitable/recommended for track-focused enthusiasts. . . while the inconel 321 will be less expensive; not have quite the high pitched/wailing tone; and suited for track-focused enthusiasts.
I guess time will tell what is Dundon makes available, recommended application(s) and COST. Dundon does not produce anything short of superb . . . and the COST always reflects the quality. . . unfortunately, I have a feeling the rear box solution will be outside my personal pay grade
To be clear, this is by no means a knock against Dundon, rather, a reflection of my limited means.I guess the biggest question to be answered is whether Dundon will deliver the Holy Grail solution . . . LOUD (headers/OAPs) and amazing tone (rear box) without mind-boggling drone. I have said all along, it anyone could deliver it ALL, it would be Dundon. Cannot wait to 'hear' all the feedback.
Avera
Last edited by UncleDude; 03-27-2023 at 03:26 PM.
03-27-2023, 04:08 PM
#54
Burning Brakes
Thread Starter
So, my interest has not changed . . . and neither has my budget. Further, not that I need to tell anyone who is not living in a cave, the economic climate in this country/world is on the verge of becoming catastrophic. So, there is that to consider as well.
As far as the resonance/drone goes, there is a reason most would consider it small miracle if Dundon can deliver what nobody else has been able to deliver. . . EVERYTHING!
Time will tell, but something tells me Dundon might just deliver a small miracle ??? Do not take it personally if my enthusiasm is tempered by finances and the world’s economic stage.
Avera
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UncleDude (03-27-2023)
03-27-2023, 04:11 PM
#55
Rennlist Member
If the price I have been quoted is accurate, you will understand. . . I am not ashamed to state I am not remotely close to being independently wealthy.
So, my interest has not changed . . . and neither has my budget. Further, not that I need to tell anyone who is not living in a cave, the economic climate in this country/world is on the verge of becoming catastrophic. So, there is that to consider as well.
As far as the resonance/drone goes, there is a reason most would consider it small miracle if Dundon can deliver what nobody else has been able to deliver. . . EVERYTHING!
Time will tell, but something tells me Dundon might just deliver a small miracle ??? Do not take it personally if my enthusiasm is tempered by finances and the world’s economic stage.
Avera
So, my interest has not changed . . . and neither has my budget. Further, not that I need to tell anyone who is not living in a cave, the economic climate in this country/world is on the verge of becoming catastrophic. So, there is that to consider as well.
As far as the resonance/drone goes, there is a reason most would consider it small miracle if Dundon can deliver what nobody else has been able to deliver. . . EVERYTHING!
Time will tell, but something tells me Dundon might just deliver a small miracle ??? Do not take it personally if my enthusiasm is tempered by finances and the world’s economic stage.
Avera
03-27-2023, 04:46 PM
#56
Burning Brakes
Thread Starter
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UncleDude (03-27-2023)
03-27-2023, 04:54 PM
#57
Basic Sponsor
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this is a place holder.
As far as back boxes and resonance. In general you need a chamber for the pressure wave to expand into for it to "give up" some energy in the expansion. "Drone" is the combination of resonance (frequency) and dB (energy) in the wave. Most of the parts we've seen to date for the 718 are very small volume chambers more akin to resonantors than an actual muffler...
Stay tuned...
As far as back boxes and resonance. In general you need a chamber for the pressure wave to expand into for it to "give up" some energy in the expansion. "Drone" is the combination of resonance (frequency) and dB (energy) in the wave. Most of the parts we've seen to date for the 718 are very small volume chambers more akin to resonantors than an actual muffler...
Stay tuned...
__________________
Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
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UncleDude (03-27-2023)
03-27-2023, 07:39 PM
#59
Burning Brakes
Thread Starter
this is a place holder.
As far as back boxes and resonance. In general you need a chamber for the pressure wave to expand into for it to "give up" some energy in the expansion. "Drone" is the combination of resonance (frequency) and dB (energy) in the wave. Most of the parts we've seen to date for the 718 are very small volume chambers more akin to resonantors than an actual muffler...
Stay tuned...
As far as back boxes and resonance. In general you need a chamber for the pressure wave to expand into for it to "give up" some energy in the expansion. "Drone" is the combination of resonance (frequency) and dB (energy) in the wave. Most of the parts we've seen to date for the 718 are very small volume chambers more akin to resonantors than an actual muffler...
Stay tuned...
Avera
03-27-2023, 08:33 PM
#60
Rennlist Member
The only one I can think of with a box similar in size to stock is the Akra rear unit. It is does not have an x-pipe or blend the tone AFAIK. The two I’ve had experience with (Soul and Kline) have mufflers and x-pipes in the design, Kline of course with the added resonated OAP which pretty much solves the problem. If Dundon has rear section that offers the tone of the x-pipe design and resonance fighting of the OEM and Akra I’m sure they’ll sell many even at that price. Looking forward to seeing their design, and hopefully they’ll explain it with a video.
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BabyNSX (03-27-2023)