Quote:
Originally Posted by Honda
Update:
I bought the transmission I was talking about but it turned out to be from 1999 Civic EX.
At the same time I put stage 1 Exedy clutch, light weight flywheel, 15'' alloy rims (heavier than stock).
I know that some of the above may not help to increase FE but I wanted to see what will happen by transferring the inertia from the flywheel to the wheels.
The car traveled farther while on neutral but the overall MPG dropped from 37 to around 34, could be the cold weather is to blame I don't know.
While driving at 65mph the rpm is around 2700.
I am still shopping around for obd1 trip meter that can help me get more accurate result.
Also I couldn't use the highway most of the time due to HOV, so I was stuck in traffic in the morning.
|
The wheels/tires are like a gear in the transmission in some ways. Larger and heavier wheels will lower actual mpg and apparent mpg. You now have more rotational mass, farther from the wheel hubs. That will make the engine work harder, effecting mpg especially during acceleration, but you will also coast better because of the rotational mass. What size tires do you have? Larger wheel/tire combos will lower your "apparent" mpg by reducing the number of miles your odometer measures. Use a good GPS to calibrate your odometer readings. The difference could be 5% or 10%--or nothing depending on your tire size.