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A very large expansion after the cat that is already an expansion. Wave strength is reduced...
Are you alluding to reduced scavenging because of that expansion? And is that why the OPFs won't work with your 991 quiet muffler (from a performance standpoint)? Since OEM still makes good power, I wonder if a muffler could be engineered that is a bit quieter and still plays nice with the OPFs?
On a related note I called Dundon about this yesterday and they were beyond accommodating with answering all my questions. Really nice guys who seem well versed in our crazy world!
Are you alluding to reduced scavenging because of that expansion? And is that why the OPFs won't work with your 991 quiet muffler (from a performance standpoint)? Since OEM still makes good power, I wonder if a muffler could be engineered that is a bit quieter and still plays nice with the OPFs?
Jamie is saying this is the reason we don't make a header system to connect with the stock muffler. Making things fit in the space would reduce wave strength, and therefore performance.
We do have a quiet muffler system that works with the stock headers/OPF's. This system + Nurburgring tips is what Bohica Racing ran on their 992 GT3 with success at Mont Tremblant (with a 92dB limit).
Most recent updated was added to the second post in the thread! I'll have another post up shortly with some data and video sharing the gains we've made.
So is this the exact product for the 478 WHP gains on the car ? Just to be sure. To my eye they don't look the same but can you verify this is the exact product ?
So is this the exact product for the 478 WHP gains on the car ? Just to be sure. To my eye they don't look the same but can you verify this is the exact product ?
Would the inconnel crack pipe produce more/less/same results rather then a muffler set up ?
Also that dyno of 478 whp was with a PDK car. Would the manual produce closer to 485-490 whp with the mods ?
Finally is this the max we can expect from your research or can we expect intake changes or tuning solutions to being the power to over 500 whp ?
I hope others have the same m questions I do ! Selling my R8 so might want to use some of the sales proceeds to make the 992 more fruity lol
We did the dyno on a prototype version of the headers, the production version cleaned up a couple bends we didn't like and made all of the runners the same length (the prototypes had a couple runners that were shorter).
So the production parts will likely make a few more ponies...
We tested a 100mm TB on the car and the 992 GT3 ecu put the kibosh on it. It will require a tune... Since it will require a tune we've pushed our 991/992 GT3 intake runner project up and will be working on that between now and the end of the year. We're using our already potent 991.2 Cup car with a motorsports ecu so we can ensure the physics of the parts are not impeded by torque limiters or the like from the ECU.
Manual cars will have a little more power yes as a little less frictional losses, but they also don't have the gearing the PDK cars have, so YMMV.
Mini crack will make a bit more, but is loud so be ready for that... Ultralight Ti muffler is the best sounding all around...
Will never say never on where we'll stop... Enlarged ITB's have been discussed, but more testing needed on the Cup with the intake runners first...
We have all of this in stock, best to jump on it before the Black Friday
Hey gang, got a couple of updates on the 992 project!
Our car had to leave to make way for the 781 GT4RS, but we were fortunate to partner with a local 992 owner to finalize development on a few other pieces.
When we installed the MCS 3-way dampers on the car last year, we realized we had some pre-load in the sway bars because the stock end links are not adjustable. To fix that, we designed our own! We built these using the best rod-ends and spherical bearings in the industry (FK) alongside proper motorsport design concepts (like pinch bolts). When you remove the pre-load on the sway bars, you ensure the car remains balanced and predictable on the road and the track.
The most recent addition to the car is our Carbon Splitter. This rounds out our full aero package and turns the 992 GT3 into a proper track weapon. This kit makes 885lbs of downforce at 120mph!
We have some track testing coming up in the next few weeks, so we will update you with results from testing the whole package!
06-01-2022, 11:51 AM
