munday
Member +
For those that say turbo cars are not the way forward... you are wrong
The future of cars will be small turbocharged engines (hmm small engine turbo'd...what car does that make me think of ) giving great efficiency and good power.
After all turbocharges use energy that would otherwise have been wasted down the exhaust, and can breathe a greater mass of air than its swept volume would normally allow...a 2 litre can become a 4 litre (in a matter of speaking) yet size and weight only increase a modest amount.
Two reasons why a turbo engine has the POTENTIAL to be more economical.
1) Thermal efficiency
2) Shape of power curve - N/A engines can be tuned using variable valve timing (or V-tec) for good bottom end power, or high end, but is very unlikely to have both - the compromise to get good bottom end power is too great.
Having good bottom end power is important because you can use lower engine revs while driving, keeping frictional losses inside the engine low (they increase rapidly as engine revs rise)
And the best way to efficiently give a small engine good low-down power is to turbo it.
Opps...sorry ive rambled on a bit :homer:
The future of cars will be small turbocharged engines (hmm small engine turbo'd...what car does that make me think of ) giving great efficiency and good power.
After all turbocharges use energy that would otherwise have been wasted down the exhaust, and can breathe a greater mass of air than its swept volume would normally allow...a 2 litre can become a 4 litre (in a matter of speaking) yet size and weight only increase a modest amount.
Two reasons why a turbo engine has the POTENTIAL to be more economical.
1) Thermal efficiency
2) Shape of power curve - N/A engines can be tuned using variable valve timing (or V-tec) for good bottom end power, or high end, but is very unlikely to have both - the compromise to get good bottom end power is too great.
Having good bottom end power is important because you can use lower engine revs while driving, keeping frictional losses inside the engine low (they increase rapidly as engine revs rise)
And the best way to efficiently give a small engine good low-down power is to turbo it.
Opps...sorry ive rambled on a bit :homer: