The final piece... Dundon gt3 muffler conversion
03-16-2019 | 09:19 PM
#48
Rennlist Member
Joined: Jan 2017
Posts: 1,502
Likes: 200
From: Tucson, AZ
For only having taken it out for 30 minutes I’m pretty happy. Need get it out and do some data logs to make sure Jamie can check the final tune results. The one thing that isn’t great is the tip alignment. I’m running the Sharkwerke 100mm tips now. They just fit with what I hopemosnsifficient clearance. Length wise I think they are good but the overall orientation of the muffler is that it has a slight pitch down to the front. As a result the tips dip down a bit. Or a huge amount but their overall length make it noticeable (at least for my OCD).
I’m sneaky!
03-16-2019 | 10:26 PM
#49
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Joined: Jan 2016
Posts: 1,957
Likes: 371
From: Gig Harbor, Wa
Tips are pointed down a bit, the length of them doesn't help. We'll get a set together that is perfect for you Rob! If you can measure the amount from the base of the muffler and how far down the ones you have now are sitting would be ideal. I'll bet 991.2 GT3 tips are perfect (they were on our car).
The muffler bracket isn't on as intended, but I know adjusting these early systems is a bear, now that we have production jigs going, the next batch will be way easier to install... And I really don't want you to have to go mess with it endlessly under the car!
Tips are on us for being an early adopter
The muffler bracket isn't on as intended, but I know adjusting these early systems is a bear, now that we have production jigs going, the next batch will be way easier to install... And I really don't want you to have to go mess with it endlessly under the car!
Tips are on us for being an early adopter
__________________
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
03-16-2019 | 10:51 PM
#50
Rennlist Member
Joined: Sep 2017
Posts: 365
Likes: 20
From: Maryland
Nice job Rob! I had a similar issue with my tips on the TPC kit. When the pipes and muffler were fitted and bolted up I went back and adjusted the angle by playing with the muffler straps to position the muffler as high up as possible and moving the tips up as far as the mounting points would allow.
03-17-2019 | 12:07 AM
#51
Thread Starter
Rennlist Member
Joined: Aug 2001
Posts: 1,414
Likes: 118
From: Danville CA
Tips are pointed down a bit, the length of them doesn't help. We'll get a set together that is perfect for you Rob! If you can measure the amount from the base of the muffler and how far down the ones you have now are sitting would be ideal. I'll bet 991.2 GT3 tips are perfect (they were on our car).
The muffler bracket isn't on as intended, but I know adjusting these early systems is a bear, now that we have production jigs going, the next batch will be way easier to install... And I really don't want you to have to go mess with it endlessly under the car!
Tips are on us for being an early adopter
The muffler bracket isn't on as intended, but I know adjusting these early systems is a bear, now that we have production jigs going, the next batch will be way easier to install... And I really don't want you to have to go mess with it endlessly under the car!
Tips are on us for being an early adopter
I am curious though about where I went wrong on the mount. If looking from the rear of the car at the transmission, the upper tabs are on the outside of the mounting plate and the lower tab is on the inside (transmission side of the plate). Seemed like that was the only orientation that would sync up the elbows to the muffler and cats
03-17-2019 | 06:45 AM
#52
Racer
Joined: Mar 2016
Posts: 438
Likes: 55
Sound wise... there is a little boominess in the 2k-3k range but nothing too bad. Overall I really like the tone. Much deeper and throaty. Not a huge difference between flaps open or closed but around town and with the windows closed it is good to be able to shut the flap and tone down the interior volume a bit. The high schreik of the race headers once you hit 4K and above has been softened up a bit. Actually probably better now for a street car. Cracks and pops at throttle lift are a bit muted now. Crank it up though and it sounds great. Very Porsche sounding... almost like my old air cooled at full tilt.
03-17-2019 | 12:06 PM
#54
Rennlist Member
Joined: Sep 2008
Posts: 599
Likes: 86
From: Silver Spring, MD
Huh, strange. I have race headers with the Akra GT4 exhaust on and it sounds great, maybe deeper/less raspy than stock PSE and no drone for me... and I think the valves are stuck open 
I'm going to go back to the GT3 exhaust, so much more aggressive, but the Akra has been so much more liveable I still don't know which one I'm going to keep.....
I'm going to go back to the GT3 exhaust, so much more aggressive, but the Akra has been so much more liveable I still don't know which one I'm going to keep.....
03-17-2019 | 05:59 PM
#56
Thread Starter
Rennlist Member
Joined: Aug 2001
Posts: 1,414
Likes: 118
From: Danville CA
No I don’t. How would a cop ever know if my exhaust isn’t stock? Cat? Sure officer its right there. Muffler.... here is the Porsche P/N. Also I make it a point to not be blasting through town. My car is no louder than the F-cars and Mclarens I see running around. My wife’s family is all in LE. Will have to check with them on the practical application on this absurd tree hugger law though....
03-17-2019 | 09:04 PM
#57
Racer
Joined: Jul 2018
Posts: 415
Likes: 18
No I don’t. How would a cop ever know if my exhaust isn’t stock? Cat? Sure officer its right there. Muffler.... here is the Porsche P/N. Also I make it a point to not be blasting through town. My car is no louder than the F-cars and Mclarens I see running around. My wife’s family is all in LE. Will have to check with them on the practical application on this absurd tree hugger law though....
I could care less about the $1000 fine, but would hate to go through the hassle taking the car to a referee, and then swapping it all back.
Last edited by GoKart Mozart; 03-17-2019 at 10:33 PM.
03-18-2019 | 08:18 AM
#58
Rennlist Member
Joined: Jul 2015
Posts: 4,759
Likes: 1,487
I was able to play a bit with tip angle by rotating the muffler ..try that. But be careful not to get too close to the bumper, these tips are pretty big (diameter) and will radiate heat into the black plastic surrounding them...mine doesn't look that great at many track days but it's a section that can be swap and you can't see it.
03-18-2019 | 12:22 PM
#59
Rennlist Member
Joined: Sep 2007
Posts: 436
Likes: 57
From: Ontario & California
No I don’t. How would a cop ever know if my exhaust isn’t stock? Cat? Sure officer its right there. Muffler.... here is the Porsche P/N. Also I make it a point to not be blasting through town. My car is no louder than the F-cars and Mclarens I see running around. My wife’s family is all in LE. Will have to check with them on the practical application on this absurd tree hugger law though....
I agree, & if we have high flow exhausts/headers on cars, a guy is just asking for it by blasting through town. I see these dipsticks driving bikes & cars going through school zones, then just gunning it for a loud sound blast. IMHO that's why they legislate & apply these laws. Being discreet & respectful of others goes a long way. The same goes for LE, these guys have a tough job & deal with a lot of riff raff.
