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

[D K]

Wasnt the GT (350) supposed to come with the 6060 instead of the 3160 (which has a 400 lb/ft capacity)?

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[Hack]

Yes but there is more to it than that....

You miss at least .2 seconds per shift. AT LEAST!

So if you shift 10 times per lap, its 2 seconds!
Imagine how much EXTRA power it takes to move a 3,700 lb car 2 seconds faster?....

Since Ford is planning on racing this car in Europe (LeMans), count the shifts there and youre talking in excess of 5 seconds per lap, just from shifting.

Power is a constant based on what the engine has available. It is a measure of how much torque is available through gear multiplication. By changing the gear ratio I can have double the torque at the rear wheels. If they are hooking I will accelerate twice as quickly. The chart of HP and torque is deceptive, so I'm not 100% sure, but I think if you can keep the Voodoo up above 6,000 rpm you will be getting the most out of it.

In shifter karts we often geared to top out at 3/4 or 7/8 of the longest straightaway.

It doesnt make sense, but the gearing will get the pass done and the other guy doesnt have time or balls to make the pass back in the braking zone.

Won many races just from that.

D

This part of your post is arguing for higher numerical gear ratios. 5th gear on the GT350 tops out at 179 mph. I sure as heck won't be topping that out at 3/4 of the straightaway at my local track. Will you?

I can see the ratios in the GT350 as posted in this thread are set up for super fast tracks, top speed efforts or fuel economy.

 

[D K]

I sure as heck won't be topping that out at 3/4 of the straightaway at my local track. Will you?
.

Absolutely not.

And that was the point I was trying to make.


If you want to go around the track fastest, you should gear much shorter.

IE topping out at 160 ish depending on track

 

[Honus]

Absolutely not. And that was the point I was trying to make. If you want to go around the track fastest, you should gear much shorter. IE topping out at 160 ish depending on track

I remember at my boss track attack program a fella was cross that the car was limited to 155. He was under the impression it would go 200...

 

[Grimace427]

...where 6th gear is utilized for the top speed with no actual overdrive gear. Exactly like they do in the Viper. Except with better ratios, because the viper has some really stupid ones...

This doesn't make sense. No actual overdrive gear, exactly like the Viper? The Viper has not only one but TWO overdrive gears.

6th gear is essentially overdrive?

It's not essentially overdrive, it is overdrive. Other than the Tremec T6060/T56(which have two overdrives), pretty much all 6-speed manual transmissions have 4 underdrive gears, one drive(1:1), and one overdrive gear.

Wasnt the GT (350) supposed to come with the 6060 instead of the 3160 (which has a 400 lb/ft capacity)?

No, it wasn't supposed to come with the 6060. That trans has gear ratios waaaaaaaayyyyyyyyy too wide and tall to match the voodoo's powerband. The 3160 isn't limited to 400lb/ft capacity just like the MT-82 isn't limited to 369lb/ft like so many ignorant people claim.

 

[Siggy550]

Hi everyone. I may have a chance to buy one. I would need to trade my '15 GTPP and EBPP. I will never track the car, and would only use it for cruises around town and spirited back road driving. What are thoughts on '15 Coyote with CAI, cat back exhaust and tune vs. base 350? I would get base with stripes for just over $50K. My thoughts are I would have a difficult time seeing any major performance difference if I put those mods on my Coyote Using it the way I do. Trying to weigh if this 350 is worth it to give up two for. I am very intrigued with having the FPC and 8250 redline. This engine alone is probably worth that trade. Thoughts?

 

[D K]

Actually the 6060 is closer ratio than the 3160

 

[Grimace427]

Hi everyone. I may have a chance to buy one. I would need to trade my '15 GTPP and EBPP. I will never track the car, and would only use it for cruises around town and spirited back road driving. What are thoughts on '15 Coyote with CAI, cat back exhaust and tune vs. base 350? I would get base with stripes for just over $50K. My thoughts are I would have a difficult time seeing any major performance difference if I put those mods on my Coyote Using it the way I do. Trying to weigh if this 350 is worth it to give up two for. I am very intrigued with having the FPC and 8250 redline. This engine alone is probably worth that trade. Thoughts?

Based on just what you wrote I would stick with the GT.

Actually the 6060 is closer ratio than the 3160

Actually both have multiple gear sets. The 6060 has two overdrive gears regardless and is way too tall for the Voodoo. Shortest first gear is 2.97, with that gearset you lose an entire ratio between first gear and 1:1. The tightest gear set I've seen in production(current Viper) has a 2.26 first gear, to get an equivalent final drive to the 3.35/3.73 GT350 you would need a 5.52 rear gear ratio.

 

[D K]

There was another one.

Its called the T56R and it was built for ford racing.
2.29 first, .86/.76 5th/6th.

Guys who raced with that swore it was the best trans theyd ever raced with.

 

[Katastrophe]

This doesn't make sense. No actual overdrive gear, exactly like the Viper? The Viper has not only one but TWO overdrive gears.




It's not essentially overdrive, it is overdrive. Other than the Tremec T6060/T56(which have two overdrives), pretty much all 6-speed manual transmissions have 4 underdrive gears, one drive(1:1), and one overdrive gear.




No, it wasn't supposed to come with the 6060. That trans has gear ratios waaaaaaaayyyyyyyyy too wide and tall to match the voodoo's powerband. The 3160 isn't limited to 400lb/ft capacity just like the MT-82 isn't limited to 369lb/ft like so many ignorant people claim.

It does makes sense, but I suppose I should clarify. The Viper doesn't utilize it's 5th or 6th gear as "overdrive" gears. I'm not talking in the technical sense, I'm talking in the relative sense.

The car achieves top speed in 6th gear. As in, it has an RPM-limited top speed. 99% of cars don't do this. Most cars have the final gear (or two) as super-high highway gears. The Viper does not. It sacrifices tall highway gears and it's MPG's suffer. Obviously, the trade off is very quick acceleration and useable power in any gear.

An example of doing this would be like taking the 0.65 (IIRC, that is what 6th gear is in the Mustang) and turning into a 0.80. Thus, using all 6 of the gears for acceleration...not just 5.

Almost like what race cars do for the racetrack.

Anyway, that, in a nutshell, is what I meant. :cheers:
EDIT: It would probably be easier to say...yes, the Viper technically has two overdrive gears. It just doesn't use them as such.

 

[krt22]

I don't think any race car uses anything less than 1:1 on the race track. Not too many production cars racing at 180mph+ either, so it's basically suffering highway mileage for no real gain.

 

[GrabberBlue5.0]

Anything shorter than 1:1 should never be used (an I guarantee it was engineered to NOT be used) as an acclerating gear. Those are overdrive gears and should (and are designed to be) used as cruising gears


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[BmacIL]

Anything shorter than 1:1 should never be used (an I guarantee it was engineered to NOT be used) as an acclerating gear. Those are overdrive gears and should (and are designed to be) used as cruising gears


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I know what you are saying, but overdrive gears are taller than their underdrive gears, not shorter. Just a terminology tip . It's sometimes confusing to a lot of people that bigger #s = short, smaller #s = tall.

 

[Grimace427]

There was another one.

Its called the T56R and it was built for ford racing.
2.29 first, .86/.76 5th/6th.

Guys who raced with that swore it was the best trans theyd ever raced with.

If you want to run gears in the 5.xx range then have at it. Send my regards to your differential and driveshaft because they won't be living long happy lives.

 

[D K]

If you want to run gears in the 5.xx range then have at it. Send my regards to your differential and driveshaft because they won't be living long happy lives.

This gearbox was run successfully in Grand Am and much taller than a 5.xx rear.
3.9's, 4.1's etc.

Mind you, this was on a Coyote motor, so adjusted, youd want maybe 15% shorter on the Voodoo.

Im trying to point out the fact that the 'spread' on a road race car neds to b much shorter than a street going car.
In the 56R case, its only 1.53 divided between 6 gears!

And that seemed to be the magic formula.

In the 3160 case, its 2.6, and thats with a very tall and un useable 6th gear.

Food for thought?

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