Toymods Car Club Inc: Tech & Conversions => Fuel usage at same RPM levels in different gears

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oldcorollas
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Kita-Ku, Sapporo, Japan
Registered:
January 2003

Re: Fuel usage at same RPM levels in different gears

Wed, 18 June 2003 04:05

SUPRAGTE wrote on Tue, 17 June 2003 23:21

Something also you guys arn't considering.
Load takes into account wind, the weight of the car and everything. Your throttle will match the load on the car, ie you'll put your foot down the more load is put on the car be it more wind or a hill coming up..
Load is the major factor in fuel consumption.
Half throttle in 3rd at 3000rpm will chew alot more fuel then light throttle 3000rpm in 4th.

yeah, but if you are at a constant speed on the road, and change between 3rd and 4th, the load on the car from external factors is the same... half throttle in thr\ird will be accelerating much more than light throttle in 4th..

i know in my car that if i'm at 4500rpm, it uses less fuel than at 3500rpm, even tho 4500 is higher car speed, because the efficiency is much greater at 4500rpm...

i did this on the M5 going from the airport to camden and back, holding at those revs, or close to..... which is around 120-140km's... sure enough, higher revs used less fuel Smile

i think with bigger motors with lower torque peaks it would be a different story tho, and each engine is different anyhoo..
Cya, Stewat

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