Does anyone have any suggestions on modifying a Z3 1.9 engine at a reasonable cost to increase gas milieage?
|
| Reply » Improving Gas Economy |
1.9? shouldn't you be getting good mileage already? just adjust your driving style.
|
| Reply » Improving Gas Economy |
Quote: | Does anyone have any suggestions on modifying a Z3 1.9 engine at a reasonable cost to increase gas milieage? | Don't drive it. That's about the only way you can improve on your 1.9. These cars are actually very good on petrol. There are lots of ways to decrease gas mileage but none that I'm aware of to get you better mpg.
|
| Reply » Improving Gas Economy |
Quote: | none that I'm aware of to get you better mpg. | Ahem
|
| Reply » Improving Gas Economy |
Skinnier tires. Higher tire pressures. Hard compound tires. 6 speed or at least lower numerical rear axle ratio. Of course, other than the 6 speed these things work against fun driving.
Cold air intake, free flow exhaust, both increase engine efficiency. But you have to NOT be tempted by the better performance and romp on it all the time. 
Driving style. Even pedal. Many drivers I ride with are constantly adding throttle then taking it out then adding it. All that accelerating hurts gas mileage. Figure out the sweet spot as to speed and gas ileage. Our M Rodaster seems to prefer 75 - 80. Above that gas mileage goes down, below that gas mileage goes down.
BTW the most efficient way to accelerate to speed is full throttle, NOT slow acceleration. It has to do with the engine efficiency curve (pounds of fuel burned per horsepower - hour). At the torque peak the engines burns the least fuel per HP produced. And since it takes the same amount horsepower - hour to accelerate from X to Y speed, the best thing to do is reduce the time and increase the efficiency. This is as per testing published by BMW back in teh late 70s.
|
| Reply » Improving Gas Economy |
Quote: | BTW the most efficient way to accelerate to speed is full throttle, NOT slow acceleration. It has to do with the engine efficiency curve (pounds of fuel burned per horsepower - hour). At the torque peak the engines burns the least fuel per HP produced. And since it takes the same amount horsepower - hour to accelerate from X to Y speed, the best thing to do is reduce the time and increase the efficiency. This is as per testing published by BMW back in teh late 70s. | This I didn't know 
|
Page 1 of 5 |
Menu
Improving Gas Economy