What is boost in a car? If it is when the turbo causes the manifold pressure to be increased how does this happen? Is it when more air molecules go in? Can someone please exlpain it to me and how it is measured? Please explain it in detail as I will understand everything. Thank you.
2007-07-09 04:05:25 · 4 answers · asked by 1999 Nissan Skyline GTR Vspec 5 in Cars & Transportation ➔ Maintenance & Repairs
A turbocharger has twin impellers divided in the center with a closed cast iron partition. The exhaust gas drives the hot side impeller which is connected by a very short shaft through a bearing and the partition. The enclosed impeller and manifolding on the air intake side compresses the incomming air causing it to heat. The heated compressed air is forced through an innercooler which reduses the air's temperature. At this very point the compressed air pressure (boost) is controlled by a pop off valve set to release to atmosphere an over abundance of pressure which could and will damage the motor if left unchecked by this valve. This regulated pressure is measured in pounds of boost. Through manifolding the pressurized atmosphere is forced into the combustion chambers when the intake valve of a given cylinder opens. The whole object is to force air in in a regulated fashon to increase the efficiency (power, torque and fuel economy) of the particular motor. The pop off valve is especially important with gasoline turbocharged motors as gasoline combustion temperatures are much higher than diesel turbo motors.
2007-07-09 04:40:27 · answer #1 · answered by Country Boy 7 · 0⤊ 0⤋
A turbo charger is an electric motor (fan) that forces air into the vehicles intake. The amount of force provided by the turbo motor is measured in pounds of boost. So a lets say 15 pound boost is just that. The air coming in passes through the turbo. The turbo than uses 15 pounds of force to drive the air into the intake where it is combined with fuel and injected into the motor. More air = more horsepower.
2007-07-09 11:40:34 · answer #2 · answered by sixpac304 3 · 0⤊ 0⤋
boost is the amount of pressure that is built up when the turbo spools up and forces air into the intake manifold it is measured in lbs
2007-07-09 11:24:15 · answer #3 · answered by Bob B 3 · 0⤊ 0⤋
Boost is the amount of air that the turbo puts out. It is usually expressed in in_hg or in_h20. And yes it means there is more air than if it was naturally asperated. For example 14.7 psi is atmosphere so if you had 16.7 psi in your intake you would have 2 psi of boost.
2007-07-09 11:24:20 · answer #4 · answered by Hunter3333 2 · 0⤊ 0⤋