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Dyno’d my Manual 991.2 GT3

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Old 11-08-2018, 09:01 AM
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LSs1Power
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Default Dyno’d my Manual 991.2 GT3

Its a manual 2018 GT3 with around 3k Miles on it. It put down 464whp 327wtq with a Dundon Black Exhaust in 4th gear. Car was running 91 Octane. It was on a Mustang dyno though which i really hate, the baseline numbers were messed up so its not a fair comparison for Dundon Exhuast system power gains.

One thing suprised me, the stock 991.2 GT3 exhaust is as loud as the Dundon Black exhaust, i really couldnt tell the difference in sound. At least I get weight off the stock system and it can handle the Long Tube headers down the road when they are relesed for the .2 GT3s.

Edit: (I discorved that the stock exhaust was much lighter than the Dundon exhaust so i went back to stock since i didnt hear more noise or feel more power).



Last edited by LSs1Power; 12-10-2018 at 07:23 AM. Reason: Removed Dundon Exhaust
Old 11-08-2018, 09:15 AM
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Gasman85
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Thanks for this. Nice horsepower. Torque should be 327, I wish we had 427 😀
Old 11-08-2018, 09:21 AM
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LSs1Power
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Originally Posted by Gasman85
Thanks for this. Nice horsepower. Torque should be 327, I wish we had 427 😀

I’m used to V8s. I corrected it thanks
Old 11-08-2018, 10:38 AM
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montoya
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Right around 500 hp corrected. Did you swap in an RS engine? LOL!
Old 11-08-2018, 11:38 AM
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flsupraguy
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Nice. My tuned 991.2 gts dynod 455 hp and 450tq on a mustang dyno. I wonder how well a 991.2 gt3 manual would dyno on 93 with headers on a mustang dyno?
Old 11-08-2018, 12:13 PM
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lucxy
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Originally Posted by flsupraguy
Nice. My tuned 991.2 gts dynod 455 hp and 450tq on a mustang dyno. I wonder how well a 991.2 gt3 manual would dyno on 93 with headers on a mustang dyno?
450 tq? Something not right with the trq number. Usually lower torque on a high revving motors like GT3. If you made 450 tq at 8000rm you'd be making ~685WHP.. I dont think the tq number is accurate.
327 tq makes more sense it puts it right around 500 hp.
Old 11-08-2018, 12:27 PM
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LSs1Power
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Originally Posted by lucxy
450 tq? Something not right with the trq number. Usually lower torque on a high revving motors like GT3. If you made 450 tq at 8000rm you'd be making ~685WHP.. I dont think the tq number is accurate.
327 tq makes more sense it puts it right around 500 hp.
He has a GTS, Turbo motors will make TQ.
Old 11-08-2018, 12:28 PM
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LSs1Power
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Originally Posted by flsupraguy
Nice. My tuned 991.2 gts dynod 455 hp and 450tq on a mustang dyno. I wonder how well a 991.2 gt3 manual would dyno on 93 with headers on a mustang dyno?
I would think headers will pick up another 20whp and 20wtq.
Old 11-08-2018, 12:33 PM
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Originally Posted by flsupraguy
Nice. My tuned 991.2 gts dynod 455 hp and 450tq on a mustang dyno. I wonder how well a 991.2 gt3 manual would dyno on 93 with headers on a mustang dyno?
Wow 450tq, had no idea these could be that strong. And a manual option! Kinda makes one rethink things for street fun...
Old 11-08-2018, 12:57 PM
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reacher
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Originally Posted by hughp3
Wow 450tq, had no idea these could be that strong. And a manual option! Kinda makes one rethink things for street fun...
I have a tuned GTS in addition to my GT3, and I've got to say it's hard to beat the GTS for street/back road fun. It's a beast. The best overall sports car I've ever owned.
Old 11-08-2018, 01:40 PM
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GT3
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Good nunbers. My GT3 Touring will be on a dynojet this Saturday. Dundon Race Headers and 93 octane.
Old 11-08-2018, 01:46 PM
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FourT6and2
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Originally Posted by GT3
Good nunbers. My GT3 Touring will be on a dynojet this Saturday. Dundon Race Headers and 93 octane.
Please get some video.
Old 11-08-2018, 01:54 PM
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Great numbers! Right inline with mine, I had just under a 1000 miles, but ran 95 octane.

Best Regards,
Dave
Old 11-08-2018, 03:46 PM
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flsupraguy
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Originally Posted by LSs1Power


I would think headers will pick up another 20whp and 20wtq.
They likely will when cobb releases stage 2 tunes. this was also in a 100 degree florida warehouse on a mustang dyno.
Old 11-08-2018, 03:47 PM
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flsupraguy
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Originally Posted by GT3
Good nunbers. My GT3 Touring will be on a dynojet this Saturday. Dundon Race Headers and 93 octane.
Nice. Please make a thread when you do


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