Gears

[Reaper948]

OK OK OK

4.10s put down more torque?.....not more horsepower.....

How? I dont get how the rear-end gears can do that.......whats the significance of those 3.55 and 4.10 numbers anyway?.....

[RF Overlord]

Reaper:

The number refers to the ratio of number of turns of the input to number of turns of the output... a 4.10 gearset requires 4.1 turns of the pinion (input) for every 1 turn of the ring (output). The higher the number, the more leverage the engine has, like using a lower gear on a bicycle; it's easier to pedal, but you have to pedal faster to go the same speed...

More accurately, it's like using a long breaker-bar on a stuck bolt, rather than a little short rachet...

[Reaper948]

Thanks for the response it helps.....

So the gears get you more RPMs...
but how can they get you better acceleration?

[RF Overlord]

It's not so much a matter of "getting you more RPM", it's a matter of leverage...the longer the lever you have to use, the easier you can move something. I think it was Archimedes who said: "Give me a lever long enough, and I'll move the world". Changing from a lower numerical gear, like a 3.27, to a higher one like 4.10, is like shifting down from 4th to 3rd...you get better acceleration, but a lower top speed.

(the "lower" gears in a transmission, like 1st and 2nd, are a higher numerical ratio; the "higher" gears like 3rd and 4th are a lower numerical ratio; in fact 4th gear is usually 1 to 1...overdrive is something like .82 to 1)

[Reaper948]

OH yeaaaaaaaaaaaaaaaaaaaaah!
In engineering...the bigger the radius, the easier it is to move.......

hahaha....yea im young

[cyclone03]

Reaper948said
but how can they get you better acceleration?
From a stand still the lower gear(4.10:1)applies more torque to the rear wheels,as long as the tires hold the higher leverage will excelerate the car easier.IE quicker.
Once underway the extra leverage is always there,the engine is turning a higher RPM in all gears plus the higher gear will still put more torque to the wheels.

[Menace]

ok

[SergntMac]

Everyone is "up to speed" now on this, right?