Tecnical questions
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Can mod make this thread sticky?
This thread is for n00bs like me to know more about cars... Technically
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since reading the boi85's thread about the seniors and senioritas, he mentioned of this 2.0bar boosts... wat is that? and issit true of cars having two engine in the boot?
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2.0 bar boost is the amount of air u want to your turbo to feed into the engine at full boost i think.Originally posted by SBS9828X:since reading the boi85's thread about the seniors and senioritas, he mentioned of this 2.0bar boosts... wat is that? and issit true of cars having two engine in the boot? -
The audi TT bimoto has 2 engines .. 1 in front (original position) and an extra in the boot.
Don't think 2 engines can fit the boot itself -
Having 2 engines is possible, but using the front engine to run the front wheels and the back engine to run the back wheels is retarded and the mismatch speeds will skid the car more than anything else.
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1 more, wats the diff of turbocharge and supercharged? or are tehy totally diffrenT?
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tailslide's technical analysis of the above statement:Originally posted by TwinTurbo_Supra:2.0 bar boost is the amount of air u want to your turbo to feed into the engine at full boost i think.
"bar" is a measure of pressure. amount of air is a measure of volume. therefore amount of air feeding engine does not equate amount of boost provided by turbo. -
turbo is driven by engine exhaust gas and super charger is driven by the crankshaft...Originally posted by SBS9828X:1 more, wats the diff of turbocharge and supercharged? or are tehy totally diffrenT?
turbo is better for high speed performace and supercharger is better for pick up only -
One is turbo, the latter is OMFG.Originally posted by SBS9828X:1 more, wats the diff of turbocharge and supercharged? or are tehy totally diffrenT? -
Originally posted by tailslide:
pressure = force/area
tailslide's technical analysis of the above statement:
[b]"bar" is a measure of pressure. amount of air is a measure of volume. therefore amount of air feeding engine does not equate amount of boost provided by turbo. [/b]
hence it increases the temperature to increase the kinetic energy?
or by forcing denser air in? -
and,Originally posted by tofushop193:turbo is driven by engine exhaust gas and super charger is driven by the crankshaft...
turbo is better for high speed performace and supercharger is better for pick up only
turbo: more lag more power
super: less lag less power
have both for the best of both worlds
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for cars the best of both world is having the low F.C. and high engine performance but it is not able to achive.so forget about the best of both worldsOriginally posted by Theatre Of Dreams:and,
turbo: more lag more power
super: less lag less power
have both for the best of both worlds -
"best of both worlds" is a very open phrase. of course anyone looking for low FC won't even consider forced induction.Originally posted by tofushop193:for cars the best of both world is having the low F.C. and high engine performance but it is not able to achive.so forget about the best of both worlds -
haha is it possible to have a car which is both turbocharged and supercharged?
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have but only one...the Lancia Delta S4.....its the only car which is super/turbocharged....and its damn complicated lo...U're better off with a twin turbo config with one big and small turbo....Originally posted by SEI:haha is it possible to have a car which is both turbocharged and supercharged? -
FTI the supercharger has no lag at all since its belt driven by the engine but it does not mean less power cos u can fiddle with the pulleys and belts for more power....turbo is more efficient cos it uses exhaust gases to spin the turbine so it does not sap engine power.....but with bigger the turbo=bigger the turbine=laggier it becomesOriginally posted by Theatre Of Dreams:and,
turbo: more lag more power
super: less lag less power
have both for the best of both worlds -
huh...Originally posted by Theatre Of Dreams:pressure = force/area
hence it increases the temperature to increase the kinetic energy?
or by forcing denser air in?
as the pressure increases, the temperature also increases for a given amount of mass of air..
according to the ideal gas eqn: PV=mRT
where P = pressure, V = vol, m = mass or air, R = gas constant and T = temp in Kelvin
density of the air is frm the eqn rho = mass/vol,
volume changes as temp changes according to charles law where Vol/Temp = constant
kinetic energy = 1/2 m.V2
u do the maths -
i'll explain using more layman termsOriginally posted by Theatre Of Dreams:pressure = force/area
hence it increases the temperature to increase the kinetic energy?
or by forcing denser air in?
imagine air as tiny particles with lots of space between each particle.
now, when pressure is exerted over a fixed vol of air, the spaces between each particle gets lesser, and the average rate at which they are colliding into each other within a smaller space increases.
such "collisions" increase the kinetic energy of the air particles and they heat up as such.
as air heats up, the particles try to distant themselves again to achieve equilibrium, and therefore, they expand.
hence, if such compression/expansion were allowed to happen as it is, the engine would receive less denser air if the heated air passing thru the turbocharger does not get get a chance to become "denser" by allowing it 2 pass thru a intermediate heat transfer agent such as an intercooler, which helps to "stabalize" the movement of the air particles by taking away some of their kinetic energy. voila! more air particles per unit time reaches the engine. -
okok, imagine u want to transfer a bowl of beans to another bowl as fast as possible. there are a few ways:
1. stuff as much beans as u can into your hands. (forced induction)
2. move your hands quickly. (high revving engines)
3. get a friend to help you so that there are more hands. (more cylinders) -
its not impossible to syncronise the speeds now with advanced electrics. The Mercedes A190 Twin utilises this system. Also seen a tiburon with 2 engines as well. n like what CyroGenic said, so did the Audi TT Bimotor. Its difficult, but not impossible to engineer. They probably won't pay off as a commercial project but as a special one off project to showcase design and technical prowess of car manufacturers, they quite fit the bill.Originally posted by nightsky87:Having 2 engines is possible, but using the front engine to run the front wheels and the back engine to run the back wheels is retarded and the mismatch speeds will skid the car more than anything else. -
disagree. its too general a statement to makeOriginally posted by tofushop193:turbo is driven by engine exhaust gas and super charger is driven by the crankshaft...
turbo is better for high speed performace and supercharger is better for pick up only
Turbos can be set to low boost, and enhance pickup as well. furthermore, if your car is in the right rpm range, it definately increases pickup. Superchargers can also be tuned to start spinning at a required RPM, so it doesn't necessarily make them better for pickup alone. In essence its probably right to say that the both increase bhp and torque, but a turbo adds more bhp than torque alone, while a supercharger increases bhp by less than a turbo but can increase torque massively more than a turbo normally could. -
u're wrong.Originally posted by tofushop193:for cars the best of both world is having the low F.C. and high engine performance but it is not able to achive.so forget about the best of both worlds
heard of the Opel/Vauxhall Super EcoCar? Supercar performance, very low FC. How about the new Venturi Fetish? no FC, supercar performance. -
a VERY GOOD analogy!Originally posted by TwinTurbo_Supra:okok, imagine u want to transfer a bowl of beans to another bowl as fast as possible. there are a few ways:
1. stuff as much beans as u can into your hands. (forced induction)
2. move your hands quickly. (high revving engines)
3. get a friend to help you so that there are more hands. (more cylinders) -
yes. it is entirely possible. But the engineering will be a B|tch.Originally posted by SEI:haha is it possible to have a car which is both turbocharged and supercharged?
