Transmission Is it possible to change the gearing ratio's???

Unknownsoldier · 2nd July 2008, 15:55

Hi,

I'm sure someone smarter than me will know the answer, is it possible to change gearing ratio's to give better low end performance at the expense of the top speed???, I would have thought a better 0-60/60-80 is better, than a higher top speed as generally 70-80mph is plenty.

Tom

cylon2007 · 2nd July 2008, 16:19

This is very easy to do an a motorcycle as they are chain drive so you can fit a larger rear sprocket (or smaller gearbox sprocket).
However in a car apart from using smaller dia wheels you are into changing the gearbox internals/final drive ratio. Big money. Also by lowering the gearing you also increase fuel consumption.

Unknownsoldier · 2nd July 2008, 16:23

Right, I was thinking a nippy car around town is handy, but rarely do you need a high top speed, but if fuel economy is adversely affected I can see why it is done.

Tom

cb550 · 2nd July 2008, 16:28

Thing is,1st gear's low enough as it is really,with the low rev limit of a diesel engine,the car would hardly get moving if it were any lower.

If you want lower ratio's elseware within the gearbox,the alternative is to just drive around in 4th gear as top.

2nd July 2008, 15:55	#1 (permalink)
Unknownsoldier Comedian/Smart Ase Civinfo guru* Join Date: 22nd September 2007 Location: Kent, UK Posts: 2,446 Thanks: 54 Thanked 26 Times in 24 Posts iTrader: (0)	Is it possible to change the gearing ratio's??? Hi, I'm sure someone smarter than me will know the answer, is it possible to change gearing ratio's to give better low end performance at the expense of the top speed???, I would have thought a better 0-60/60-80 is better, than a higher top speed as generally 70-80mph is plenty. Tom

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This thread is about: Is it possible to change the gearing ratio's???, it's in Engines and Transmission at the Honda Civic forum Civinfo; Hi, I'm sure someone smarter than me will know the answer, is it possible to change gearing ratio's to give better low end performance at ...

2nd July 2008, 16:19	#2 (permalink)
cylon2007 Triangular Exhaust Join Date: 14th April 2007 Location: South Manchester/North Cheshire Posts: 478 Thanks: 0 Thanked 2 Times in 2 Posts iTrader: (0)	This is very easy to do an a motorcycle as they are chain drive so you can fit a larger rear sprocket (or smaller gearbox sprocket). However in a car apart from using smaller dia wheels you are into changing the gearbox internals/final drive ratio. Big money. Also by lowering the gearing you also increase fuel consumption.

2nd July 2008, 16:23	#3 (permalink)
Unknownsoldier Comedian/Smart Ase Civinfo guru* Join Date: 22nd September 2007 Location: Kent, UK Posts: 2,446 Thanks: 54 Thanked 26 Times in 24 Posts iTrader: (0)	Right, I was thinking a nippy car around town is handy, but rarely do you need a high top speed, but if fuel economy is adversely affected I can see why it is done. Tom

2nd July 2008, 16:28	#4 (permalink)
cb550 Supporter Triangular Exhaust Join Date: 26th May 2007 Location: Nottingham Posts: 391 Thanks: 13 Thanked 2 Times in 1 Post iTrader: (0)	Thing is,1st gear's low enough as it is really,with the low rev limit of a diesel engine,the car would hardly get moving if it were any lower. If you want lower ratio's elseware within the gearbox,the alternative is to just drive around in 4th gear as top.