'01 Civic EX Gears.....

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Chief_Billy@hotmail.com - 17 Sep 2007 15:43 GMT

I have an '01 Civic EX coupe 5-speed that may need a clutch
replacement soon. 90% of my driving is Interstae commute. At 70 mph in
5th gear, my RPM's are at 3400. I was thinking that if I could have
taller gears in 4th and 5th, reducing that RPM point to around
2800-3000, I might be able to get even better fuel economy.

Has anyone out there done such a modification to their car, or know if
optional gear rations are available ?

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Tegger - 18 Sep 2007 00:26 GMT

Chief_Billy@hotmail.com wrote in news:1190040215.403463.111310@
19g2000hsx.googlegroups.com:

> I have an '01 Civic EX coupe 5-speed that may need a clutch
> replacement soon. 90% of my driving is Interstae commute. At 70 mph in
[quoted text clipped - 4 lines]
> Has anyone out there done such a modification to their car, or know if
> optional gear rations are available ?

I wish Mista B0ne was still posting here. He knew this sort of stuff.

My Integra suffers from the same problem. What I wouldn't give for a taller
5th...

A taller 5th would also help highway-mile piston ring life, which is
distressingly short on Honda's lower-geared models.

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Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

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jim beam - 19 Sep 2007 05:31 GMT

> Chief_Billy@hotmail.com wrote in news:1190040215.403463.111310@
> 19g2000hsx.googlegroups.com:
[quoted text clipped - 15 lines]
> A taller 5th would also help highway-mile piston ring life, which is
> distressingly short on Honda's lower-geared models.

"distressingly short"??? and when was the last time you owned a buick?

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Bucky - 20 Sep 2007 08:46 GMT

On Sep 17, 7:43 am, Chief_Bi...@hotmail.com wrote:

> I have an '01 Civic EX coupe 5-speed that may need a clutch
> replacement soon. 90% of my driving is Interstae commute. At 70 mph in
> 5th gear, my RPM's are at 3400. I was thinking that if I could have
> taller gears in 4th and 5th, reducing that RPM point to around
> 2800-3000, I might be able to get even better fuel economy.

hmm, I have a 01 Civic LX, and at 70 mph I'm barely over 3000 rpm.
Guess the EX is geared quite differently.

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duckbill - 02 Oct 2007 00:39 GMT

A larger diameter tire would also work to lower rpm's if you have the
clearance but would also affect your speedo reading. If your OEM tires are
worn that would also increase your rpm's a bit for a given speed. Remember
you need more power at higher speeds to off set drag which increases
dramatically at higher speeds. A higer gear ratio would result in lower
engine speed and possibly worse gas milage if your out of the correct
torque and horsepower range.
And Honda's like to spin. Honda engines powered all of the Indy racers
this year and none had an engine failure.

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