Dundon 718 GT4RS Development Thread. Input wanted!
01-16-2024, 04:04 PM
#106
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Hi Jamie, thanks for the data.
What about the exhaust without header package? (for the lucky owners of monitored GPF...)
Power/torque wise, we should expect a similar gain as over street header, right ?
And sound wise, the higher pitch should remain, right?
About your intake system being developed, will this be compatible with Euro cars ? no need of tune?
Thanks
What about the exhaust without header package? (for the lucky owners of monitored GPF...)
Power/torque wise, we should expect a similar gain as over street header, right ?
And sound wise, the higher pitch should remain, right?
About your intake system being developed, will this be compatible with Euro cars ? no need of tune?
Thanks
Jamie
Like many, I am a big fan of Dundon products, so the following is by no means meant to be a dig toward your efforts . . .
Your above post focuses on power gains delivered by the rear box replacement for the RS (and, presumably, GT4). That is great, but I think know that what your target audience has been asking for is a rear box solution that produces better tone without intolerable drone, PARTICULARLY when coupled with your headers/OAPs
Avera
Like many, I am a big fan of Dundon products, so the following is by no means meant to be a dig toward your efforts . . .
Your above post focuses on power gains delivered by the rear box replacement for the RS (and, presumably, GT4). That is great, but I think know that what your target audience has been asking for is a rear box solution that produces better tone without intolerable drone, PARTICULARLY when coupled with your headers/OAPs
Avera
Did you see the go pro video pointed down at the exhaust?
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
Last edited by Jamie@dundonmotorsports; 01-16-2024 at 04:07 PM.
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BabyNSX (01-17-2024)
01-17-2024, 01:32 PM
#107
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Hi Jamie, thanks for the data.
What about the exhaust without header package? (for the lucky owners of monitored GPF...)
Power/torque wise, we should expect a similar gain as over street header, right ?
And sound wise, the higher pitch should remain, right?
About your intake system being developed, will this be compatible with Euro cars ? no need of tune?
Thanks
What about the exhaust without header package? (for the lucky owners of monitored GPF...)
Power/torque wise, we should expect a similar gain as over street header, right ?
And sound wise, the higher pitch should remain, right?
About your intake system being developed, will this be compatible with Euro cars ? no need of tune?
Thanks
The intake is still in testing but so far no tune required, we would expect the same in Europe.
01-19-2024, 06:58 AM
#108
Intermediate
thanks for the clarification. Quite disappointing.
If I understand correctly, your street header package requires your muffler and vice versa.
I think that was absolutely not clear from your communication so far. I suggest you specify that on your website.
If I understand correctly, your street header package requires your muffler and vice versa.
I think that was absolutely not clear from your communication so far. I suggest you specify that on your website.
01-19-2024, 11:54 AM
#109
Instructor
01-19-2024, 12:14 PM
#110
You need to what Whiskey Fridays for all the insider info!!!
Guys have been prototyping their larger volume intake chamber with 93mm main throttle body. As per all 991 GT cars but obviously printed with the TB inlet on the top to mate with 4RS airbox.
Interesting thing is that the car is sensitive to intake air temps, so larger volume lowers temps so there is tweaking to do, in conjunction with understanding how the ITB mapping and cylinder fill characteristics might change.
result so far…something like c +8 up top iirc? and big mid range torque improvements in concert with the exhaust package.
Guys have been prototyping their larger volume intake chamber with 93mm main throttle body. As per all 991 GT cars but obviously printed with the TB inlet on the top to mate with 4RS airbox.
Interesting thing is that the car is sensitive to intake air temps, so larger volume lowers temps so there is tweaking to do, in conjunction with understanding how the ITB mapping and cylinder fill characteristics might change.
result so far…something like c +8 up top iirc? and big mid range torque improvements in concert with the exhaust package.
01-19-2024, 05:44 PM
#111
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You need to what Whiskey Fridays for all the insider info!!!
Guys have been prototyping their larger volume intake chamber with 93mm main throttle body. As per all 991 GT cars but obviously printed with the TB inlet on the top to mate with 4RS airbox.
Interesting thing is that the car is sensitive to intake air temps, so larger volume lowers temps so there is tweaking to do, in conjunction with understanding how the ITB mapping and cylinder fill characteristics might change.
result so far…something like c +8 up top iirc? and big mid range torque improvements in concert with the exhaust package.
Guys have been prototyping their larger volume intake chamber with 93mm main throttle body. As per all 991 GT cars but obviously printed with the TB inlet on the top to mate with 4RS airbox.
Interesting thing is that the car is sensitive to intake air temps, so larger volume lowers temps so there is tweaking to do, in conjunction with understanding how the ITB mapping and cylinder fill characteristics might change.
result so far…something like c +8 up top iirc? and big mid range torque improvements in concert with the exhaust package.
. The 93mm TB helps the car as it approaches peak suction from the headers like the other cars we put them on. More on this as we get some road testing!
01-19-2024, 05:47 PM
#112
01-19-2024, 05:53 PM
#113
I will be selling my 718 GT4RS STREET HEADER PACKAGE in the coming months if anyone interested PM me. 300 miles on them. Sounds amazing!
The most powerful header system you can buy for your GT4RS! Our tuned length manifolds and 3" catted "wave pipes" connect to the stock muffler for big improvements in sound and performance! 20whp gains with the stock muffler(more than 32 when combined with our V11 Muffler!). Great torque gains alone but paired with our V11 muffler get even more gains!
The most powerful header system you can buy for your GT4RS! Our tuned length manifolds and 3" catted "wave pipes" connect to the stock muffler for big improvements in sound and performance! 20whp gains with the stock muffler(more than 32 when combined with our V11 Muffler!). Great torque gains alone but paired with our V11 muffler get even more gains!
Last edited by MattDFW; 01-19-2024 at 05:56 PM. Reason: Added Information
01-19-2024, 07:57 PM
#114
Instructor
03-05-2024, 11:48 AM
#115
Dealer is removing Dundon exhasut this week. Will be packed up and ready to sell by week end. Below is the package that I have.
718 GT4RS Streed header package. Total was $9737.09. Sell price is $6500 delivered. 320 miles on them as of now. Contact me if interested.
718 GT4RS Streed header package. Total was $9737.09. Sell price is $6500 delivered. 320 miles on them as of now. Contact me if interested.
Last edited by MattDFW; 03-07-2024 at 11:16 AM. Reason: Addded info.
03-13-2024, 07:00 PM
#117
05-06-2024, 03:28 PM
#119
this is the exact system, the local dealership packaged it all up when the took it off my car.
https://www.dundonmotorsports.com/pr...header-package
https://www.dundonmotorsports.com/pr...header-package
