2015+ GT350 Mustang official power specs: 526 HP / 429 LB-FT!

[krt22]

I've already posted the gear ratios along with their respective speeds at redline with both base and R tire sizes. Post #572.

Yes I'm aware, I used the same values from tremecs website, has ford officially released those ratios? If not they could use custom ratios

Sponsored

 

[Grimace427]

Yes those are the official gear ratios.

 

[Lucky7s]

How many have driven a 8250 RPM Redline car before?

Hands up on this forum of those who have driven a Car that has a 8000 RPM car or Higher? Trust me, the gearing is going to be such that well hell... If 1st gear runs out at 55 MPH, then you will be below 3000 RPM at below 20 MPH. If you are not use to high rpm motors, this is going to be a totally different driving experience for you. You will want to Live in that 3500 to 8250 power band, and the only time you will be below 3000 RPM is 1st gear unless you short shift it.

If you compare the FPC engine vs. the Standard Coyote 5.0 the only place the regular 5.0 Liter engine has on it is between 2500 and 3100 RPM's (and its only like 25-30 Ft/lbs), everywhere else the FPC engine makes more Torque and over a wider power band.

 

[D K]

305/35/19 rear tires, 3.73 axle ratio, 8,250 redline:

1st: 3.253:1.............55mph
2nd: 2:233:1............81mph
3rd: 1.611:1.............111mph
4th: 1.24:3..............145mph
5th 1:1....................179mph
6th: .629:1..............1700 rpm @60mph
Reverse: 2.955:1.


With 315/30/19 rear tires:

1. 53
2. 78
3. 107
4. 139
5. 173
6. 1,800rpm @60mph

If these ratios are correct, this is basically a 5 speed trans with an overdrive.

At 0.85:1 6th would make this a decently spacd transmission.
Knowing Tremec though, you'll have to swap out 5th/6th as a pack instead of just 6th.

Also to keep in mind, the taller you can keep the final drive, the cooler your diff will run...

D

 

[krt22]

Yes, basically a pure OD gear, but I dont see much use for making 6th closer when 5th will get you to 180mph...unless you ungovern the car and are doing texas mile type events

I also did not know these were the official specs. I have not seen anything published, strange they would release this info, yet have the curb weight still a mystery.

 

[-=Hot|Ice=-]

Is it true the car is not electronically limited?

 

[D K]

I came up with

Final drive 4.1

2.9
1.9
1.48
1.2
1.0
0.85

As a pretty good gear set give or take based on average speeds on race comps on my local tracks (wsir, brp, etc).

 

[Hack]

Hands up on this forum of those who have driven a Car that has a 8000 RPM car or Higher? Trust me, the gearing is going to be such that well hell... If 1st gear runs out at 55 MPH, then you will be below 3000 RPM at below 20 MPH. If you are not use to high rpm motors, this is going to be a totally different driving experience for you. You will want to Live in that 3500 to 8250 power band, and the only time you will be below 3000 RPM is 1st gear unless you short shift it.

If you compare the FPC engine vs. the Standard Coyote 5.0 the only place the regular 5.0 Liter engine has on it is between 2500 and 3100 RPM's (and its only like 25-30 Ft/lbs), everywhere else the FPC engine makes more Torque and over a wider power band.

That's right. Why would I want a car that's slower to 30 mph than a PP Coyote? 3.73 gears are ok, but I still would like to see steeper. I understand the GT350 is slightly lighter and has more rubber, but some people will have wider aftermarket tires.

I'm sure I will love most things about this car, but that won't be one of them.

 

[D K]

Or

2.8
1.85
1.4
1.15
1.0
0.9

If a more dedicated road race car, keeping in mind that youd be on 18's, dropping the diameter to 26.4, still with a 4.1.

 

[-=Hot|Ice=-]

My e92 M3 revved to 8,400.


Gear / Ratio / Max Speed / RPM drop on upshift
1st 4.780 44
2nd 2.933 71 5200
3rd 2.153 97 6200
4th 1.678 124 6500
5th 1.390 150 6900
6th 1.203 173 7300
7th 1.000 208 7000
Final Ratio 3.154
Redline 8400

 

[Hack]

My e92 M3 revved to 8,400.


Gear / Ratio / Max Speed / RPM drop on upshift
1st 4.780 44
2nd 2.933 71 5200
3rd 2.153 97 6200
4th 1.678 124 6500
5th 1.390 150 6900
6th 1.203 173 7300
7th 1.000 208 7000
Final Ratio 3.154
Redline 8400

I like those ratios better.

 

[krt22]

Pure bench racing at this point, we shall see once the car is released and owners/mags give it a full flogging.

But call me crazy, 0-30 is a blink of an eye either way, if (and that is a big IF) there is any difference between the two, its going to be on the order of fractions of a second. Luckily you never see below 30 on the road course :cheers:

 

[D K]

Hands up on this forum of those who have driven a Car that has a 8000 RPM car or Higher? Trust me, the gearing is going to be such that well hell... If 1st gear runs out at 55 MPH, then you will be below 3000 RPM at below 20 MPH. If you are not use to high rpm motors, this is going to be a totally different driving experience for you. You will want to Live in that 3500 to 8250 power band, and the only time you will be below 3000 RPM is 1st gear unless you short shift it.

If you compare the FPC engine vs. the Standard Coyote 5.0 the only place the regular 5.0 Liter engine has on it is between 2500 and 3100 RPM's (and its only like 25-30 Ft/lbs), everywhere else the FPC engine makes more Torque and over a wider power band.

FWIW, I raced an S2000 in SCCA and NASA a few years ago.
We started off with the F20C and when the F22C came out, we switched over.
Even though we lost a 1000 rpm, we picked up a bunch of torque.

Its not how high you can rev the engine, its how much more you need to rev than the guy next to you.
Just by keeping revs for a little while longer then the LS3 next to you, you will be able to gain position and he will have to fight for it back after you passed him.

I mentioned in another thread that Ive seen what this engine is able to do in a dyno cell and I can tell you 10K rpm is not a problem.

D

 

[ohtobbad]

So in 2nd gear you will be speeding, sounds good to me

I think it will take small adjustment to what we normally drive,
revs, torq. and ratio's. I suspect with this set up, it will work good in
about 95% of the applications. Not going to take long to figure out what gear and revs,
do be at, when you wish to attempt anything.
Like kicking a Camaro's ass

 

[Hack]

FWIW, I raced an S2000 in SCCA and NASA a few years ago.
We started off with the F20C and when the F22C came out, we switched over.
Even though we lost a 1000 rpm, we picked up a bunch of torque.

Its not how high you can rev the engine, its how much more you need to rev than the guy next to you.
Just by keeping revs for a little while longer then the LS3 next to you, you will be able to gain position and he will have to fight for it back after you passed him.

I mentioned in another thread that Ive seen what this engine is able to do in a dyno cell and I can tell you 10K rpm is not a problem.

D

I'm jealous of your experience. I get what your saying: when you are shifting you aren't putting power to the ground. I know that if you have gears that are too steep you risk turning the vehicle into a dump truck with lots of pulling torque but not accelerating very fast due to constant shifting.

Maybe the 3.73s are perfect, but it would be awesome to have a steeper first so that you get out of the hole a little better and shift to second between 30 and 40 mph. 0-60 should be right around 4 seconds, +/- a little, so shifting at 30 is roughly 2 seconds + a little in first gear. That's quite a while in my book. Plenty of time. 0-60 will be a lot slower if you are waiting to get into the power band in first and then shifting just before you get to 60.

I know - it isn't supposed to be a drag racer. But on the street where most of the miles will be put on these cars, stop lights are a reality. If you aren't in a hurry just start in 2nd gear.

Sponsored