LSD?
06-20-2006, 07:46 PM
#21
2nd Gear Member
Thread Starter
Join Date: Jun 2006
Location:
Posts: 451
RE: LSD?
ORIGINAL: scrming
The 8.8 refers to the rear end size.... we have a 7.5 inch rear end in our cars... the GT's get an 8.8 inch rear end...
Our cars come with a 3.31 gear set in the rear end... moving to a higher number like 3.73 or 4.10 gives you more UMPH off the line but it also means higher RPMS... some one can probably do a lot better techincal explaination... LOL
ORIGINAL: V6MustangKnight
ok, i have a hard time following people with numbers and decimals....what exactly do u mean by 8.8? what do those mean? and what does it mean when someone says my car has 4.11 gears?
ok, i have a hard time following people with numbers and decimals....what exactly do u mean by 8.8? what do those mean? and what does it mean when someone says my car has 4.11 gears?
Our cars come with a 3.31 gear set in the rear end... moving to a higher number like 3.73 or 4.10 gives you more UMPH off the line but it also means higher RPMS... some one can probably do a lot better techincal explaination... LOL
06-20-2006, 07:57 PM
#22
2nd Gear Member
Join Date: Mar 2006
Location: Noblesville,IN
Posts: 474
RE: LSD?
8.8", 7.5", 9", 8 3/4" - these are the size of the ring gear used in the rearend. ex: The 7.5 rearend has a ring gear 7.5 inches in diameter.
4.10 rear gear ratio is really an abbreviation as well. That is 4.10 to 1. That means that in one revolution of the pinion gear 4.1 revolutions of the ring gear would take place.
Also- when someone says a "high" rearend gear it would be low numerically and vice versa. Ex: A 3.31 to 1 gear ratio is a higher rearend gear than a 3:55 to 1. A 4.10 gear is a lower gear ratio than a 3.73 to 1.
4.10 rear gear ratio is really an abbreviation as well. That is 4.10 to 1. That means that in one revolution of the pinion gear 4.1 revolutions of the ring gear would take place.
Also- when someone says a "high" rearend gear it would be low numerically and vice versa. Ex: A 3.31 to 1 gear ratio is a higher rearend gear than a 3:55 to 1. A 4.10 gear is a lower gear ratio than a 3.73 to 1.
06-20-2006, 08:20 PM
#25
2nd Gear Member
Join Date: Mar 2006
Location: Noblesville,IN
Posts: 474
RE: LSD?
No. The higher the ratio the longer the revolution. The higher the number the shorter the revolution of the gear.
When someone says they're putting in shorter gears, it means they are for example changing from a 3.25 to a 3.89 rear gear ratio.
Think of it this way - if a guy wants to land speed race at the Bonneville Salt Flats he might use a 2.46 rear gear ratio as an example to go to redline for top speed over a five mile straight course. He will start out very slow or even have a push truck to start but he will gain speed assuming a nice torque curve over the long haul.
If the same guy wants to take the same car to the drags he might put 4.56s in it because it will bring him to the car's HP peak in 1/4 mile at a very quick rate.
When someone says they're putting in shorter gears, it means they are for example changing from a 3.25 to a 3.89 rear gear ratio.
Think of it this way - if a guy wants to land speed race at the Bonneville Salt Flats he might use a 2.46 rear gear ratio as an example to go to redline for top speed over a five mile straight course. He will start out very slow or even have a push truck to start but he will gain speed assuming a nice torque curve over the long haul.
If the same guy wants to take the same car to the drags he might put 4.56s in it because it will bring him to the car's HP peak in 1/4 mile at a very quick rate.
06-20-2006, 08:24 PM
#26
2nd Gear Member
Thread Starter
Join Date: Jun 2006
Location:
Posts: 451
RE: LSD?
ORIGINAL: TNT1968
No. The higher the ratio the longer the revolution. The higher the number the shorter the revolution of the gear.
When someone says they're putting in shorter gears, it means they are for example changing from a 3.25 to a 3.89 rear gear ratio.
Think of it this way - if a guy wants to land speed race at the Bonneville Salt Flats he might use a 2.46 rear gear ratio as an example to go to redline for top speed over a five mile straight course. He will start out very slow or even have a push truck to start but he will gain speed assuming a nice torque curve over the long haul.
If the same guy wants to take the same car to the drags he might put 4.56s in it because it will bring him to the car's HP peak in 1/4 mile at a very quick rate.
No. The higher the ratio the longer the revolution. The higher the number the shorter the revolution of the gear.
When someone says they're putting in shorter gears, it means they are for example changing from a 3.25 to a 3.89 rear gear ratio.
Think of it this way - if a guy wants to land speed race at the Bonneville Salt Flats he might use a 2.46 rear gear ratio as an example to go to redline for top speed over a five mile straight course. He will start out very slow or even have a push truck to start but he will gain speed assuming a nice torque curve over the long haul.
If the same guy wants to take the same car to the drags he might put 4.56s in it because it will bring him to the car's HP peak in 1/4 mile at a very quick rate.
06-20-2006, 08:47 PM
#27
2nd Gear Member
Join Date: Mar 2006
Location: Noblesville,IN
Posts: 474
RE: LSD?
It would make the car quicker as long as you didn't overrev the engine. It would not make the car faster on the top end. If you want a higher top speed I would recommend:
Use a Xcal2 to turn off your top speed limiter and /or raise your computer controlled rev limiter. Use mods that will increase the hp in the rpm range that you currently use.
Changing to a taller rear tire will also affect your actual gear ratio. Raising the height of your rear tires effectively makes a 3.31 more like a 3.25 final drive ratio depending on how tall you go with the tires. Scrming used to have 265/60-16s on his car but swapped again because they hurt his 1/4 mile performance. But for top end work, they would be right at home! You could change gears and then juggle tire sizes to get the ratio you're looking for.
Use a Xcal2 to turn off your top speed limiter and /or raise your computer controlled rev limiter. Use mods that will increase the hp in the rpm range that you currently use.
Changing to a taller rear tire will also affect your actual gear ratio. Raising the height of your rear tires effectively makes a 3.31 more like a 3.25 final drive ratio depending on how tall you go with the tires. Scrming used to have 265/60-16s on his car but swapped again because they hurt his 1/4 mile performance. But for top end work, they would be right at home! You could change gears and then juggle tire sizes to get the ratio you're looking for.
06-20-2006, 10:01 PM
#29
3rd Gear Member
Join Date: Mar 2006
Location: Rancho Cucamonga, CA
Posts: 855
RE: LSD?
Real easy. There is a data port under the steering wheel next to the e-brake. You plug your tuner into that port and follow the instructions. If a dumb teacher could figure it out, so can you.
06-20-2006, 10:03 PM
#30
2nd Gear Member
Thread Starter
Join Date: Jun 2006
Location:
Posts: 451
RE: LSD?
ORIGINAL: pat6674u
Real easy. There is a data port under the steering wheel next to the e-brake. You plug your tuner into that port and follow the instructions. If a dumb teacher could figure it out, so can you.
Real easy. There is a data port under the steering wheel next to the e-brake. You plug your tuner into that port and follow the instructions. If a dumb teacher could figure it out, so can you.
Thread
Thread Starter
Forum
Replies
Last Post
vistapony
V6 S197 General Discussion
2
02-06-2006 08:31 PM
