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Forum: GT4
02-14-2019, 12:26 AM
Replies: 106
Views: 16,886
Posted By [email protected]

Yes, this is exactly right. So Ben's is catless...

Yes, this is exactly right. So Ben's is catless and GT3 Muffler, so at the louder end of the spectrum. With Cats and a Quiet muffler will be definitely toned down and just a bit more than stock...
Forum: GT4
02-13-2019, 03:52 PM
Replies: 106
Views: 16,886
Posted By [email protected]

We have the 3-6 now, 1-2 is coming from Holinger,...

We have the 3-6 now, 1-2 is coming from Holinger, they owe us an update so will check in...



Cats will kill a bit more volume and you can run one of our Quiet Mufflers as well to kill a few...
02-11-2019, 05:35 PM
Replies: 47
Views: 4,053
Posted By [email protected]

We have many installed on high powered track cars...

We have many installed on high powered track cars with no issues. Generally the Quiet Muffler reduces dB by about 10dB over the OEM muffler. It's not a miracle worker, but it has helped many cars...
Forum: GT4
02-10-2019, 12:43 AM
Replies: 106
Views: 16,886
Posted By [email protected]

Couple more installs going on, 2 in California,...

Couple more installs going on, 2 in California, one in Australia... Will be some fast GT4's out there!
oh and the tune is finalized at 405whp peak... ;)
02-01-2019, 03:40 PM
Replies: 8
Views: 893
Posted By [email protected]

All good brotha, just wanted to clarify data that...

All good brotha, just wanted to clarify data that wasn't jiving with ours and others that have dyno'd our setup...
Forum: GT4
02-01-2019, 03:39 PM
Replies: 14
Views: 915
Posted By [email protected]

AJW45 also picked up a Quiet Muffler for his GT3...

AJW45 also picked up a Quiet Muffler for his GT3 muffler conversion, not something to run all the time mind you as it does it's job pretty well and kills some of the fun, but a great solution for...
01-31-2019, 10:01 PM
Replies: 8
Views: 893
Posted By [email protected]

Great questions. We don't sell the side...

Great questions.

We don't sell the side deletes or black/orange muffler as HP/TQ gaining mods, but there is a little bit of benefit. The stock system necks the major flow path down to 2.5" before...
01-31-2019, 09:55 PM
Replies: 8
Views: 893
Posted By [email protected]

As a courtesy, didn't want to clutter your thread...

As a courtesy, didn't want to clutter your thread with banter unrelated to your post...

Thought you were posting 991.2 RS data, as the torque values stock were 325wtq, way higher than the values...
01-31-2019, 08:21 PM
Replies: 8
Views: 893
Posted By [email protected]

Dundon Header 991.2 GT3 Dyno Comparisons

We've been getting a ton of questions lately on a recently posted thread using our headers as a baseline for a competitive product. While this is very flattering to be used as the benchmark it seems...
01-29-2019, 04:23 PM
Replies: 13
Views: 631
Posted By [email protected]

Hapy to help (sometimes it’s better to email......

Hapy to help (sometimes it’s better to email... ;) )

Catted and Race are similar gains on the
997.1 GT3 race is about 20whp, catted is about 18-20
997.2GT3 race is about 20-22whp catted is...
Forum: GT4
01-25-2019, 02:22 PM
Replies: 15
Views: 1,357
Posted By [email protected]

That would be quite a giant pile of muffler...

That would be quite a giant pile of muffler adapters for a 991.2 GT3... ;)
01-24-2019, 04:36 PM
Replies: 11
Views: 745
Posted By [email protected]

The intake runners we want to tweak for the 3.4L...

The intake runners we want to tweak for the 3.4L as they're made for the 3.8L currently, but that won't take long, just need to get the 3.4L 981 we have in the stable in for testing. It is next up!...
Forum: GT4
01-23-2019, 06:02 PM
Replies: 59
Views: 11,639
Posted By [email protected]

Not Dundon race Headers means another companies ...

Not Dundon race Headers means another companies race headers. OEM headers with the intake runners weren’t tested...
Forum: GT4
01-23-2019, 05:29 PM
Replies: 59
Views: 11,639
Posted By [email protected]

"Not Dundon" Race Header Dyno with Intake Runners...

"Not Dundon" Race Header Dyno with Intake Runners etc...

Just to keep this thread updated, we ran the intake runners/IPD Plenum/TB/GT3 Exhaust with not Dundon Race headers to see if there were...
Forum: GT4
01-23-2019, 04:43 PM
Replies: 3
Views: 504
Posted By [email protected]

Yes it does include the GT3 muffler kit and we...

Yes it does include the GT3 muffler kit and we recommend the GT3 muffler kit with the intake runners after a number of dyno pulls; the engine is much happier with the GT3 muffler kit, way lower and...
Forum: GT4
01-23-2019, 03:40 PM
Replies: 3
Views: 504
Posted By [email protected]

Dundon Intake Runner Kit Dyno Results on Not Dundon Headers

Hi Guys,

We were curious how much power the Dundon Intake Runners would make on race headers that produce a less powerful suction wave. We suspected that by improving and reducing pressure...
Forum: GT4
01-23-2019, 02:52 PM
Replies: 106
Views: 16,886
Posted By [email protected]

We did, 3 revisions and many dyno runs/tuning...

We did, 3 revisions and many dyno runs/tuning sessions later...

...
Forum: GT4
01-21-2019, 05:53 PM
Replies: 15
Views: 1,357
Posted By [email protected]

The 991.2 Tips are longer. I don't know if SW...

The 991.2 Tips are longer. I don't know if SW tips are long enough. 991.1 and 991.2 are slightly different lengths.

Our GT3 muffler and 991.2 Tips is perfect on the GT4...
01-21-2019, 03:39 PM
Replies: 11
Views: 745
Posted By [email protected]

Correct, avoiding drone, and keeping the car...

Correct, avoiding drone, and keeping the car livable with a muffler. For a 981 race car with no dB restrictions, you can do straight pipes (we've made one for a customer in the past and it is...
01-20-2019, 11:18 PM
Replies: 38
Views: 4,541
Posted By [email protected]

Looks like another 991.2 GT3 Race header mule... ...

Looks like another 991.2 GT3 Race header mule... I'd get a lifetime muffler for it before track season, as the 991.2 4.0L has a bit more cylinder pressure than the 991.1. And from most reports the...
Forum: GT4
01-20-2019, 07:52 PM
Replies: 59
Views: 11,639
Posted By [email protected]

Will likely look something like this... ...

Will likely look something like this...

Headers only back to back...

https://www.dundonmotorsports.com/blog/dundon-gt4-race-headers-vs-competitor-race-headers
Forum: GT4
01-20-2019, 06:22 PM
Replies: 106
Views: 16,886
Posted By [email protected]

We're ready when you are! The 9k GT3...

We're ready when you are!



The 9k GT3 engine can take more as well, but cost of entry is way way higher. GT4 is the modding sweet spot, enthusiast owned, lower cost of entry and lots of solid...
Forum: GT4
01-20-2019, 06:15 PM
Replies: 59
Views: 11,639
Posted By [email protected]

We have competitive race headers here at the shop...

We have competitive race headers here at the shop that we will put on the GT4 to demonstrate the difference and what to expect if you don't have Dundon Race Headers on the car... Likely finish up by...
01-20-2019, 04:17 AM
Replies: 11
Views: 745
Posted By [email protected]

We’re estimating the entire package will be in...

We’re estimating the entire package will be in that ballpark. We’ll start testing in February and will keep everyone updated.
Forum: GT4
01-19-2019, 04:29 PM
Replies: 106
Views: 16,886
Posted By [email protected]

https://cimg1.ibsrv.net/gimg/rennlist.com-vbulleti...

https://cimg1.ibsrv.net/gimg/rennlist.com-vbulletin/1920x1080/gt4_stock_vs_dms2_vs_d4_kit_runners_and_991_plenum_0a28db8273dc618d9e554cfecedad6f0ef2ea79e.png
Bottom is Stock
Middle is Dundon Race...
Showing results 1 to 25 of 499
 


 
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