Dundon GT4/Spyder Race Header Group Buy
12-11-2016, 07:48 PM
#346
Off to a good start! Did you do the tune as well, or stock software?
Let me chime in with my thoughts on the headers. I met with fellow Rennlister TM5 today to take the car out for the first time. TM5 is looking for a set of headers for his GT4 and I think today may have made up his mind.
Cold start - The exhaust has a bit more of a bark but not obnoxious. If you have sensitive neighbors they will appreciate this.
Warm up - We drove around town keeping the revs below 3k while waiting for the oil to get up to temp. During this phase it was easy to carry on a conversation and the interior noise with the windows up was pretty much stock. There was absolutely no drone!
Warmed up - I made a couple of runs at moderate through the lower gears and the car has more pull. Next I made a couple of harder runs up to 5k through 2nd gear. At 4k the sound really comes alive and as the revs hit 5k the car is pulling harder. Next up a couple of runs WOT just into 3rd gear. Completely different car. The pull from 5k is outstanding. Finally I switched on the sport button and you have to love the sound. On the way home I found a clear section of highway with an overpass and was able to make a WOT run up through 2nd gear, a tall 2nd helps, and to me the car sounds better than my 15 GT3. The CEL never came on during today's run.
I couldn't find a dyno facility that could deal with the non rotating front wheels in my area but I trust the Dundon numbers. Matt Moreman did a good job of documenting his Dundon headers on the 991 GT3 list and there were no surprises. I'm sure someone will have second party numbers in the not too distant future.
I was thinking of adding short gears but for now I am completely happy with the car. Probably the next thing I would add would be a Guard diff. I've had good results with their products in the past.
The car is garaged now till spring. Hopefully I'll have the Dundon cats on by then.
If you have a set of these on order you will not be disappointed.
Hopefully TM5 will chime in with his thoughts on todays ride along.
Thank you Charles and Jamie.
Cold start - The exhaust has a bit more of a bark but not obnoxious. If you have sensitive neighbors they will appreciate this.
Warm up - We drove around town keeping the revs below 3k while waiting for the oil to get up to temp. During this phase it was easy to carry on a conversation and the interior noise with the windows up was pretty much stock. There was absolutely no drone!
Warmed up - I made a couple of runs at moderate through the lower gears and the car has more pull. Next I made a couple of harder runs up to 5k through 2nd gear. At 4k the sound really comes alive and as the revs hit 5k the car is pulling harder. Next up a couple of runs WOT just into 3rd gear. Completely different car. The pull from 5k is outstanding. Finally I switched on the sport button and you have to love the sound. On the way home I found a clear section of highway with an overpass and was able to make a WOT run up through 2nd gear, a tall 2nd helps, and to me the car sounds better than my 15 GT3. The CEL never came on during today's run.
I couldn't find a dyno facility that could deal with the non rotating front wheels in my area but I trust the Dundon numbers. Matt Moreman did a good job of documenting his Dundon headers on the 991 GT3 list and there were no surprises. I'm sure someone will have second party numbers in the not too distant future.
I was thinking of adding short gears but for now I am completely happy with the car. Probably the next thing I would add would be a Guard diff. I've had good results with their products in the past.
The car is garaged now till spring. Hopefully I'll have the Dundon cats on by then.
If you have a set of these on order you will not be disappointed.
Hopefully TM5 will chime in with his thoughts on todays ride along.
Thank you Charles and Jamie.
12-11-2016, 08:22 PM
#347
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Alan's on stock software...
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.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
12-11-2016, 09:02 PM
#348
Rennlist Member
As Jamie pointed out I'm on the stock software. If anyone is in the Cincinnati area and would like a ride let me know. I'd be happy to give you a demo.
TM5 and I were both impressed with the results. Always nice to have additional opinions.
I'm heading over to U.S. Race Gear tomorrow to give Craig, the owner, a ride tomorrow. We raced together in PCA in the previous GT3 S class. Both in wide bodied 944 turbos. Craig's car puts out North of 425 HP at the wheels. He's not easily impressed.
TM5 and I were both impressed with the results. Always nice to have additional opinions.
I'm heading over to U.S. Race Gear tomorrow to give Craig, the owner, a ride tomorrow. We raced together in PCA in the previous GT3 S class. Both in wide bodied 944 turbos. Craig's car puts out North of 425 HP at the wheels. He's not easily impressed.
12-12-2016, 07:00 PM
#350
Rennlist Member
When do you plan to install them? Curious to hear your take.
12-12-2016, 07:19 PM
#352
Rennlist Member
Going to dyno pre, then have them installed and dyno post with both BGB and Dundon tunes, so hope to have some #s by the end of the week, Olsen and dyno shop's schedule permitting. I likely won't get a chance to drive it until the weather clears up in the next week or two. 
12-12-2016, 07:24 PM
#353
Rennlist Member
That will be interesting information. Hope your weather clears sooner than later. I took a couple of friends for a ride today. Both got of the car with big smiles.
12-13-2016, 12:32 PM
#357
Rennlist Member
Alan, some video clips please!!!!
I would liked to have done more documenting of the headers but my seat time was limited. Getting in and out the buckets with my new hip has been a bit challenging.
12-13-2016, 12:59 PM
#358
Rennlist Member
I had mine coated white to match the body (and +1% HP per -10° F at intake);
http://swaintech.com/race-coatings/r...aust-coatings/
http://swaintech.com/race-coatings/r...aust-coatings/
Last edited by d00d; 12-14-2016 at 09:19 PM.
12-13-2016, 01:02 PM
#359
Race Director
Originally Posted by Alan C.
Kareem, I would love to post a couple. However, as I look out the window there is a mix of snow/sleet on the ground.
I would liked to have done more documenting of the headers but my seat time was limited. Getting in and out the buckets with my new hip has been a bit challenging.
I would liked to have done more documenting of the headers but my seat time was limited. Getting in and out the buckets with my new hip has been a bit challenging.
Last edited by CAlexio; 12-13-2016 at 01:32 PM.
12-13-2016, 01:20 PM
#360
Drifting
