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MT82

1st - 3.66
2nd - 2.43
3rd - 1.69
4th - 1.32
5th - 1.00
6th - 0.65

6r80

1st - 4.17
2nd - 2.34
3rd - 1.52
4th - 1.14
5th - 0.86
6th - 0.69

TR-3650

1st: 3.380:1
2nd: 2.000:1
3rd: 1.320:1
4th: 1.000:1
5th: 0.670:1

4r70w

1st = 2.84
2nd = 1.55
3rd = 1
4th = .70


Now if you know how gear ratios work you can see why the 1999-2004 Mustangs needed 3.73's or 4.10's to move out.

Under their stock configuration they could barely get out of their own way.
 

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Well if you want that bad enough, you'll go buy the car and parts and get it done. I already did, not doing it again.

Maybe they seem quicker because of others not being able to hook with 4.10's out of the hole where using a gear that maximizes 3rd gear is easier to get out of the hole? By what you are saying, you 5.0L guys would be even faster yet if you switched to a Glide. I'd like to see a heads up comparison of a car that has all the typical bolt-ons, suspension, tune and a set of 3.15-3.31 gears vs 4.10's to look at the 60ft and rest of the track data. I know if the car is making the same hp, the trap speed will be nearly identical. I would still think if the car had 4.10's and hooks good that it would be quicker because of the much harder launch. I dunno, I'm just learning about these cars. They seem to be contradicting everything that us drag racers have been doing the past 60 or so years.
 

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LOL, eventually, but will follow you guy's advice. 3.31 will be what I will look for.
 

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Discussion Starter #24
Maybe they seem quicker because of others not being able to hook with 4.10's out of the hole where using a gear that maximizes 3rd gear is easier to get out of the hole? By what you are saying, you 5.0L guys would be even faster yet if you switched to a Glide. I'd like to see a heads up comparison of a car that has all the typical bolt-ons, suspension, tune and a set of 3.15-3.31 gears vs 4.10's to look at the 60ft and rest of the track data. I know if the car is making the same hp, the trap speed will be nearly identical. I would still think if the car had 4.10's and hooks good that it would be quicker because of the much harder launch. I dunno, I'm just learning about these cars. They seem to be contradicting everything that us drag racers have been doing the past 60 or so years.
Was pondering much of the same thoughts which is exactly why I was asking. Going to the track this coming weekend with the 373's, then will swap to 331 and see the info from there..
 

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Discussion Starter #25
Well, car went 11.6 @116 on a 1.62 60' with 373's. Putting in the 331's next weekend and will be making a return trip to compare.
 

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The answer is there via mathematics, if you have all of the correct inputs. I believe if you look into moment of inertia and possibly angular momentum you will find the answer there. However, does that really matter? In the end what we really want is the car to be quicker, we aren't necessarily looking for the formula that proves why. Time and again these cars have proven themselves to be quicker with less gear. I'm especially glad to see some of the forced induction cars finally catching on to this, as it only makes sense that if an NA car can haul ass with so little gear, forced induction is going to do it with even less. Those guys are now trying to find old 80s pickup truck rear axles so they can rob the 2.47 ring and pinions out of them. :)
I am building a 2007 GT and I am in the process of a Coyote swap, 6R80 trans, 6F Circle D, 3:08 gear, 30 inch tire and a Pro-Charger P1X. Actually with the converter I would like to leave with next to no boost with that converter. I am using a 2 step and a trans-brake relay. I wondering how this car will launch this way. 10lbs boost max. Thoughts?
 
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