What are the dis advantages of Turbo?

[laphan]

Originally Posted by ekam

I think you mean the opposite. Higher elevation = thinner air = less efficient turbo.

Nope,
turbo actually works better than NA in high altitude:

A turbocharger also helps at high altitudes, where the air is less dense. Normal engines will experience reduced power at high altitudes because for each stroke of the piston, the engine will get a smaller mass of air. A turbocharged engine may also have reduced power, but the reduction will be less dramatic because the thinner air is easier for the turbocharger to pump.

http://auto.howstuffworks.com/turbo.htm/printable

[sparker]

Originally Posted by laphan

Nope,
turbo actually works better than NA in high altitude:

A turbocharger also helps at high altitudes, where the air is less dense. Normal engines will experience reduced power at high altitudes because for each stroke of the piston, the engine will get a smaller mass of air. A turbocharged engine may also have reduced power, but the reduction will be less dramatic because the thinner air is easier for the turbocharger to pump.

http://auto.howstuffworks.com/turbo.htm/printable

Beat me to it, was about to come in and defend you there. Less atmospheric pressure is no problem with forced induction, you just run more boost. No such option with NA engines......

Also dont forget that density altitude is a figure that constantly changes (even in the one spot) meaning that your NA engine will always be adjusting to the amount of air pressure in the atmosphere and therefore never really be tuned perfectly.

Sam

[jacabean]

turbos also make massive torque considering their usually small engine displacement. you would need very large displacement on an n/a motor to produce those torque numbers. Turbos tend to be very fast up hill also.

[Lordblood]

Driving my sister's Audi A4 with the 2.0 turbocharged four, I personally feel more comfortable driving a naturally aspirated engine better. There is pretty much no turbo lag on the A4, but the problem is that there is a very flat torque curve and its actually quite hard to modulate power, it's either off on on. It might be something specific about Audi, but that's been my experience.