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Old 06-03-2008, 11:40 AM   This thread is in the EcoModder Project Library | #1 (permalink)
EcoModding Lurker
Join Date: Jun 2008
Location: Boston, MA
Posts: 8

Protege - '94 Mazda Protege LX
90 day: 28.86 mpg (US)
Thanks: 1
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Taller top gear makes a real difference (10%)

I have a fun little project for my first post:

My daily driver of choice isn't quite as economical as some of the cars I see here, but it's hardly a gas guzzler. I drive a 1994 Mazda Protege LX with the DOHC 1.8L 125hp engine. Unlike it's SOHC counterpart, the gearbox has much shorter gear ratios that make driving a frustratingly high-rpm experience at normal highway speeds. After some research, I discovered that a taller gear was available from a Ford Probe (this platform shares many parts with several other cars).

Some pictures:

Check out the full article I wrote about doing the mod.

I've seen a 10% improvement in highway mileage (which varies significantly with my driving style on a given tank). Since the change in gear ratio is also about 10%, this seems pretty reasonable to me.


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