2015 GT Dyno run(with video) - Ford Mustang Forum
 
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post #1 of 14 (permalink) Old 09-11-2014 Thread Starter
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2015 GT Dyno run(with video)

So....Saw this article and thought I'd share it with everyone! Apparently, Gibson tested out their cat-back exhaust on a S550 GT and had unbelievably good gains....literally, unbelievably. They -claim- 39Hp bump from their cat-back system. Something is a tad fishy to me. Also, this would suggest that the stock HP is only around 360? I find this hard to believe as well because i've seen stock 11-14 put down similar numbers. I will be very disappointed if this is true...I certainly hope the IRS doesn't eat 15 HP. But anyway, take a look at the curve and let me know what you think! Video: First 2015 GT With Aftermarket Exhaust And Dyno Test - StangTV


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post #2 of 14 (permalink) Old 09-11-2014
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I seriously doubt that there would be such a big gain from such a small mod. If it is true then its great but i dont think so. And 360 stock isnt cool either. I really hope that isnt the case. Im sure we will see soon enought as to what the truth is. My dealership has already got 4 new gt's in stock. So it wont be long.


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post #3 of 14 (permalink) Old 09-11-2014
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I seriously doubt that there would be such a big gain from such a small mod. If it is true then its great but i dont think so. And 360 stock isnt cool either. I really hope that isnt the case. Im sure we will see soon enought as to what the truth is. My dealership has already got 4 new gt's in stock. So it wont be long.

Eh, the 2011s were around that zone at the wheels add a few more pounds and IRS? Not a surprise.

Honestly, I wouldn't be surprised if stock for stock a 2011 would beat a 2015 if only by a slight margin. (Assuming no one uses launch control or whatever, so apples to apples!)

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post #4 of 14 (permalink) Old 09-11-2014 Thread Starter
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Eh, the 2011s were around that zone at the wheels add a few more pounds and IRS? Not a surprise.

Honestly, I wouldn't be surprised if stock for stock a 2011 would beat a 2015 if only by a slight margin. (Assuming no one uses launch control or whatever, so apples to apples!)
"beat" how? In a straight line? MAYBE. but no way on a track. But I'm sure this will be tested by many magazines/blogs.

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post #5 of 14 (permalink) Old 09-11-2014
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"beat" how? In a straight line? MAYBE. but no way on a track.
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post #6 of 14 (permalink) Old 09-11-2014
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But I'm sure this will be tested by many magazines/blogs.
Don't forget about the armchair forum racers.
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post #7 of 14 (permalink) Old 09-11-2014
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"beat" how? In a straight line? MAYBE. but no way on a track. But I'm sure this will be tested by many magazines/blogs.
I'm sure that you are correct that the 2015 will be faster on the track than the 2011-2014 cars. At the drag strip I think it will be a "wash". The added weight of the 2015 (even though small) plus the added driveline losses (a modest 3 1/4 % increase in driveline losses will negate the new 15HP increase ), I believe will result in a rear wheel power to weight ratio that will be very close to the same for 2015 vs. 2011-2014 cars. I am not a "hater" of the 2015 Mustang at all, but I think the Ford engineers knew they needed to find an extra 15HP not only for marketing efforts but to also make sure the car was not "slower" than the car it was replacing. While many are interested in track performance, the majority of buyers interested in performance always look to 0-60 and 1/4 mile times.

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Last edited by TucsonDave; 09-11-2014 at 07:06 PM. Reason: Correct error.
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post #8 of 14 (permalink) Old 09-11-2014
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Quote:
Originally Posted by Nuclearranger View Post
Eh, the 2011s were around that zone at the wheels add a few more pounds and IRS? Not a surprise.

Honestly, I wouldn't be surprised if stock for stock a 2011 would beat a 2015 if only by a slight margin. (Assuming no one uses launch control or whatever, so apples to apples!)
Yeah you might be right. The extra weight could potentially offset the 15 hp. The gt still has plenty of hp per dollar. Worth it even if its not any faster.

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post #9 of 14 (permalink) Old 09-12-2014
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Don't forget about the armchair forum racers.

LOL and so true. I doubt there are many (if any) of us here that have the skill to push either car to it's max potential around a track. So the real world experience with IRS for us will be an improved ride.


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LOL and so true. I doubt there are many (if any) of us here that have the skill to push either car to it's max potential around a track. So the real world experience with IRS for us will be an improved ride.


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So true, even with 6 years of extensive Track time I still know I leave alot on the table. I would love to see someone like Randy Pobst do a back to back.

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Between the drivetrain loss and the added wt. I wouldn't be at all surprised if the 2015 were slower. But when you add in the decreased in nvh better hahandling, more advanced electronics, line lock, launch control, larger tires, larger brakes, possibly improved aerodynamics, stiffer chassis, better wt distribution, there is little doubt the 2015 will be a much improved car.

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I'm starting to think there isn't going to be any real performance gains for 2015, other than a smoother ride and less dive under braking.

2011-2014 BPP/TP cars handle very well, and appear to have the same brakes and wheels/tires as on the 2015 Performance Pack cars. Yes, the revised suspension (front and rear) should help handling, but it could also be off-set by the weight-gain.

Straight-line is going to be a wash. And I don't think the Launch Control will mean much on a MT car. Might make it slower, actually. LC works wonders on DCTs, but I doubt it's usefulness on MT cars. It's not difficult to launch a MT car, so why they think they need LC on them is beyond me.

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2011-2014 BPP/TP cars handle very well, and appear to have the same brakes and wheels/tires as on the 2015 Performance Pack cars. Yes, the revised suspension (front and rear) should help handling, but it could also be off-set by the weight-gain.
Performance Pack GTs are going to have 15" rotors and 6 piston calipers up front. Although I was disappointed to see that they are still sticking with the single piston floating caliper in the rear and not moving to a fixed caliper.
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My 2011 Brembo Gt had horrible brake dive, pitched and yawed pretty bad too. I was disappointed with the handling to say the least

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