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Ben and Rob, your Intake Runners shipped!
Thanks for the other inquiries. We're finishing up the jig for the over axle pipes for a few more guys! Let me know if any questions!
Are those going to be catted or non? Is pricing on the site?
Ben and Rob, your Intake Runners shipped!
Thanks for the other inquiries. We're finishing up the jig for the over axle pipes for a few more guys! Let me know if any questions!
Excited to hear that these are being deployed for first wave of installs. Not that it matters or changes anything, do you have some better pics of the item? Yours vs OEM, etc... TIA!
Are those going to be catted or non? Is pricing on the site?
Either, pricing is on the site
Originally Posted by SGOGT4
Hey Jamie did you guys ever get a chance to bolt the PSE on for a Dyno run?
We did the catted dyno the other day and it was about 2whp loss, the PSE is next, car has been on the rack (then Charles has knee surgery). He's finishing up the jigs as he's back now, and we'll work to get the car back together and on the dyno with the PSE. Based on the previous dyno's I think the PSE vs GT3 Muffler will be about 8-10whp (my estimate), we'll see with the actual data on the dyno.
Originally Posted by GTS_Ninja
Excited to hear that these are being deployed for first wave of installs. Not that it matters or changes anything, do you have some better pics of the item? Yours vs OEM, etc... TIA!
Yup will get good pics of them vs OEM when the next batch comes in!
Excited to hear that these are being deployed for first wave of installs. Not that it matters or changes anything, do you have some better pics of the item? Yours vs OEM, etc... TIA!
send me a nice 6pk and I and will take some pics of the two next week during the install
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 the end of January, testing the 991 GT3 intake runners currently...
"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 reasonable gains... There were...
Bottom Line is Not Dundon Race Headers only, Top Line is Intake Runners, IPD and TB, GT3 Muffler, Tune and Not Dundon Race Headers
^^ Just to be clear, does "Not Dundon Race Headers" mean "Somebody else's catless race headers" or does it mean "OEM headers, which are of course Not Dundon Race Headers"?
^^ Just to be clear, does "Not Dundon Race Headers" mean "Somebody else's catless race headers" or does it mean "OEM headers, which are of course Not Dundon Race Headers"?
Not Dundon race Headers means another companies race headers. OEM headers with the intake runners weren’t tested...
We've been working on the intake side of things on the GT4/Spyder and using the same science that gave you the 4th runner on our headers, we improved the intake runners.
We set a goal early on for a 400whp GT4 with more torque, smoother power band and we didn't want to open up the engine to do it. So we had to find all of the inefficiencies, change how the pressure waves were timed and change the way pressure is built in the manifold.
Many versions were tested and compared to our mathematical model and we refined from there.
Prototype Version of the Intake Runners:
The final result is below:
Dundon D4 Kit: 401 WHP GT4 Stock Engine Bottom Line is GT4 Stock, Middle Line is the D2 Kit (Race Headers/Pro Tune), Top is D4 (Headers, Intake Runner Kit, CarreraS Center Plenum and TB, GT3 Muffler Kit, Pro Tune)
Summary of Gains over stock
Peak Torque gains of 40lbft at the wheels
Max Torque gains of 73lbft at the wheels
Peak HP Gains >60whp
>75whp gains at 5000rpm
>85whp gains at 7000rpm
100whp gains at the rev limiter
Maintains >300lbft at the wheels from 4000rpm to 7000rpm
Carries 380whp to redline
Here's another one that might put it better into context.
D4 GT4 compared to a 991.1 GT3 Dundon D4 Kit compared to 991.1 GT3 Stock
Since everyone will have different amounts of mods, just contact us and we'll get a package price together for you.
Those with existing Dundon Pro Tunes get a free retune
Those with IPD Plenums don't need the Carrera S Center Plenum
Those with GT3 Muffler kits don't need our kit (unless you want the cats).
Bear with us as we update the website with all the current information and Dyno's. As we fill out more of the information on the combinations I'll update here and on the website.
01-04-2019, 11:46 PM
