Gears?
07-12-2010, 09:43 PM
#2
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
Power from the engine is multiplied by the transmission(or reduced when in overdrive), then multiplied again in the differential. Changing the gears in the diff changes the power multiplication, but also changes the available range of speed in each gear. A numerically higher gear puts more power down to the wheels giving faster acceleration, but at the cost of reduced max mph in each gear.
To give you an idea, assume some arbitrary engine producing an arbitrary amount of power. It goes through an arbitrary transmission and out pops X amount of power. With stock 3.27 gears you have X times 3.27, but with 4.10 gears you have X times 4.10. The total between the 4.10 divided by 3.27 is around 1.25....as a percentage that means the 4.10 gears increase power at the wheels by approximately 25% over stock 3.27 gears.
Ideally for drag racing you want to pick the most gear that gives you the most acceleration and has you trapping at the top of a certain gear, 3rd or 4th usually.
To give you an idea, assume some arbitrary engine producing an arbitrary amount of power. It goes through an arbitrary transmission and out pops X amount of power. With stock 3.27 gears you have X times 3.27, but with 4.10 gears you have X times 4.10. The total between the 4.10 divided by 3.27 is around 1.25....as a percentage that means the 4.10 gears increase power at the wheels by approximately 25% over stock 3.27 gears.
Ideally for drag racing you want to pick the most gear that gives you the most acceleration and has you trapping at the top of a certain gear, 3rd or 4th usually.
07-12-2010, 11:38 PM
#3
Join Date: Jul 2010
Location: Arizona
Posts: 23
Power from the engine is multiplied by the transmission(or reduced when in overdrive), then multiplied again in the differential. Changing the gears in the diff changes the power multiplication, but also changes the available range of speed in each gear. A numerically higher gear puts more power down to the wheels giving faster acceleration, but at the cost of reduced max mph in each gear.
To give you an idea, assume some arbitrary engine producing an arbitrary amount of power. It goes through an arbitrary transmission and out pops X amount of power. With stock 3.27 gears you have X times 3.27, but with 4.10 gears you have X times 4.10. The total between the 4.10 divided by 3.27 is around 1.25....as a percentage that means the 4.10 gears increase power at the wheels by approximately 25% over stock 3.27 gears.
Ideally for drag racing you want to pick the most gear that gives you the most acceleration and has you trapping at the top of a certain gear, 3rd or 4th usually.
To give you an idea, assume some arbitrary engine producing an arbitrary amount of power. It goes through an arbitrary transmission and out pops X amount of power. With stock 3.27 gears you have X times 3.27, but with 4.10 gears you have X times 4.10. The total between the 4.10 divided by 3.27 is around 1.25....as a percentage that means the 4.10 gears increase power at the wheels by approximately 25% over stock 3.27 gears.
Ideally for drag racing you want to pick the most gear that gives you the most acceleration and has you trapping at the top of a certain gear, 3rd or 4th usually.
If you put it in a high gear you can crank the hell out of it and get moving fast quickly but you run out of gas a lot faster. If you put it in the low gear, the start is tough but once going you're have a whole lot more top end.
Not sure if that's accurate but it gets me through the day.. I have a set of Ford 3.73 sitting in my spare bedroom waiting for an install day. Can't wait!
07-14-2010, 10:34 AM
#6
4th Gear Member
Join Date: Jul 2010
Location: Ohio
Posts: 1,498
Depends on application, what you want out of it, does gas mileage matter much, ect ect.
Personally I run 4.10 gears and the car winds up LOT quicker then it did prior. But you also spend a lot more time shifting, gas mpg dropped some, ect ect
There's pros and cons to all of it.
Personally I run 4.10 gears and the car winds up LOT quicker then it did prior. But you also spend a lot more time shifting, gas mpg dropped some, ect ect
There's pros and cons to all of it.
07-14-2010, 01:06 PM
#7
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
What kind of racing and engine setup you have determines to a great extent the gear selection. 4.10 is good for drag racing, but some of the guys with turbo or positive displacement blowers prefer smaller gearing like 3.27-3.55 for traction. I prefer road racing/autox type stuff so I don't go higher than 3.55 since you're better off with more mph range in each gear and need the top speed of 130-140+ for fast tracks.
It all depends.
It all depends.
Thread
Thread Starter
Forum
Replies
Last Post
KingRando
2005-2014 Mustangs
5
10-02-2015 08:06 AM
junior04
4.6L (1996-2004 Modular) Mustang
1
09-28-2015 10:53 AM