Talk about cheaply turbo-ing a 5sfe, BADDDDDDD Options

[x_itchy_b_x]

at least its a 5th gen owner.

[Bigmeanbulldog55]

Wouldn't it be hard to run 10psi due to the engine running bad when not boosting? The timing would be hard to figure I imagin.

why would engine run bad while not boosting? i assumer youre talking about restriction of compressor blades. well if properly designed it should not provide a large restriction. however it will be more restrictive, and since we dont want a really slow car under normal driving, were planning on powering the motor continuosly from alternator(at a lower power) during normal driving (to provide around 0.5-1psi of boost). we thought of using a bypass valve, but thought the other idea to be much better and simpler. i dont get what your trying to say about timing.

No, I'm talking about how the car adjusts the the amount of air going through it. I just figured it would screw it up to have the on and off again high levels of boost. I think it's more than workable on low levels, but I don't know about high levels. It just seems like it would run weird. I don't know though.

[celicaST]

Wouldn't it be hard to run 10psi due to the engine running bad when not boosting? The timing would be hard to figure I imagin.

why would engine run bad while not boosting? i assumer youre talking about restriction of compressor blades. well if properly designed it should not provide a large restriction. however it will be more restrictive, and since we dont want a really slow car under normal driving, were planning on powering the motor continuosly from alternator(at a lower power) during normal driving (to provide around 0.5-1psi of boost). we thought of using a bypass valve, but thought the other idea to be much better and simpler. i dont get what your trying to say about timing.

No, I'm talking about how the car adjusts the the amount of air going through it. I just figured it would screw it up to have the on and off again high levels of boost. I think it's more than workable on low levels, but I don't know about high levels. It just seems like it would run weird. I don't know though.

why would it screw it up? the engine management responds to incoming data in milliseconds. even conventional turbocharged cars arent always at high boost (or boost at all). i assume youve seen a boost gauge on a turbo car theyre not always at max boost. keep in mind, with our setup we likewise are going to need fuel system upgrades, fuel management, and a intercooler.

[BBoYRuGGeD]

keep in mind, with our setup we likewise are going to need fuel system upgrades, fuel management, and a intercooler.

just curious but why would u need an intercooler? if its just a fan connected to the intake its not like its taking hot exhuast air like a real turbo right?

bboy

[celicaST]

keep in mind, with our setup we likewise are going to need fuel system upgrades, fuel management, and a intercooler.

just curious but why would u need an intercooler? if its just a fan connected to the intake its not like its taking hot exhuast air like a real turbo right?

bboy

when you compress a gas quickly without letting heat flow to the environment, the work done on the gas will be transferred to heat in the gas. this is know as adiabatic compression where delta W (work done) equals delta E (internal energy). have you ever held the hose of an air compressor? it will get warm because of this fact. i dont get what your saying, a real turbo doesnt take hot exhaust air. the exhaust gases power a turbine that powers a compressor to compress the incoming air (which very well might be cold). but through the process of compression, the air's temperature increases.

also, when i said im going to need an intercooler, i wasnt talking for the e-ram if thats what you thought. it will be needed for the high power setup that me and my brother are in the process of designing and searching for parts we will need.

This post has been edited by celicaST: Feb 13, 2006 - 1:00 AM

[CelicaSTX02]

when you compress a gas quickly without letting heat flow to the environment, the work done on the gas will be transferred to heat in the gas. this is know as adiabatic compression where delta W (work done) equals delta E (internal energy). have you ever held the hose of an air compressor? it will get warm because of this fact. i dont get what your saying, a real turbo doesnt take hot exhaust air. the exhaust gases power a turbine that powers a compressor to compress the incoming air (which very well might be cold). but through the process of compression, the air's temperature increases.

also, when i said im going to need an intercooler, i wasnt talking for the e-ram if thats what you thought. it will be needed for the high power setup that me and my brother are in the process of designing and searching for parts we will need.

*Adiabatic means that "no heat is transferred...it does not enter or leave the system"
*internal energy is denoted with a "U" not an "E"
*basically what this kid is trying to say is that when you use a turbo, it causes a lot of heat. And to know how much heat is produced, you must understand adiabatic processes. A turbo just takes in air and compress it by increasing the velocity of the molecules. When the molecules doesn't have anywhere to go (like going back through the intercooler) the compression process heats it up. This heat is the disadvantage of turbochargers.

This post has been edited by CelicaSTX02: Feb 13, 2006 - 5:27 PM

[celicaST]

when you compress a gas quickly without letting heat flow to the environment, the work done on the gas will be transferred to heat in the gas. this is know as adiabatic compression where delta W (work done) equals delta E (internal energy). have you ever held the hose of an air compressor? it will get warm because of this fact. i dont get what your saying, a real turbo doesnt take hot exhaust air. the exhaust gases power a turbine that powers a compressor to compress the incoming air (which very well might be cold). but through the process of compression, the air's temperature increases.

also, when i said im going to need an intercooler, i wasnt talking for the e-ram if thats what you thought. it will be needed for the high power setup that me and my brother are in the process of designing and searching for parts we will need.

*Adiabatic means that "no heat is transferred...it does not enter or leave the system"
*internal energy is denoted with a "U" not an "E"
*basically what this kid is trying to say is that when you use a turbo, it causes a lot of heat. And to know how much heat is produced, you must understand adiabatic processes. A turbo just takes in air and compress it by increasing the velocity of the molecules. When the molecules doesn't have anywhere to go (like going back through the intercooler) the compression process heats it up. This heat is the disadvantage of turbochargers.

i dont get it, are you rewording what i said, or disagreeing with me? your definition of adiabatic is exactly what i said. assuming the time is minute, than it is a reasonable approximation that no heat is transferred, but the physical work of compression increases the internal energy of the gas. yes, i have seen internal energy represented by both U and E depending on the text and context.