North American Turbocoupe Organization



freewheeling?
leroy_420b Offline
Junior Member
#21
i can make just a little bit of boost like 3-5 psi if i fre rev to the rev limiter in neutral just my 2 cents
88 tc gillis k&N 86 tc getting all the goodies from the 88 plus ported e-6 3 inch exhaust ranger roller ported intake manifolds not sure what else should be rolling sometime next year
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Robert Camp Offline
Posting Freak
#22
I did not say the heat energy is not used in the process. I said "The heat causes the gas to expand, creating greater pressure and thus velocity that drives the turbine."
This is contrary to your statement that "the turbine is not in fact driven by the exhaust gasses."
The heat created by combustion is used only as it causes the gas to pressurize and increase the velocity of the gas as it exits the manifold. The heat by itself does nothing positive. It is only useful in the presence of the exhaust gases.
As far as the pinwheel, what's driving it? The mass of gas flowing thru blades, the heat is not the primary mover. And I am most certain I can spin a turbine up sufficiently with cold air. Not that it's practical. The point is that I can spin it up with cold air, no heat, but there's no way to make it work with just heat, you need the mass of the gas.
Actually, I have a better perpetual motion machine, join an electric motor to a generator. I'll just spin the generator with a lawnmover pull rope to get it going...... Maybe Rolls would like your theories on heat input. Kidding just like you.
Robert Camp
'86 Medium Regatta Blue TC, 5-speed, original owner.
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moneypit Offline
Member
#23
Quote:Originally posted by Robert Camp:

Actually, I have a better perpetual motion machine, join an electric motor to a generator. I'll just spin the generator with a lawnmover pull rope to get it going......
HA! True story: I spent 3 hours trying to explain why this wouldn't work to a guy I used to know. He thought he had come up with the key to ending our dependance on foreign oil, lol.
'88 TurboCoupe, '01 Impala, '83 Crown Vic, '95 Jeep Cherokee, 63.5 Galaxie Fastback, '57 Studebaker President... So many cars, so little time.
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phil88tbird Offline
Member
#24
okay, seriously thank you all for your input but i'm not trying to get anyone upset here
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Robert Camp Offline
Posting Freak
#25
Not upset here! And I, anyway, wouldn't blame you. You just asked a question.
Robert Camp
'86 Medium Regatta Blue TC, 5-speed, original owner.
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Joe F Offline
Posting Freak
#26
Hey, friendly discussion is a good learning process! Also makes me really think about the way things work and that helps me understand them better.

It's all good! Big Grin
JR's Place - My '87 Turbocoupe
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moneypit Offline
Member
#27
I'm going to kill you all.


Just kidding!
Or am I?
Yeah... I am.
...or maybe not!
Smile
'88 TurboCoupe, '01 Impala, '83 Crown Vic, '95 Jeep Cherokee, 63.5 Galaxie Fastback, '57 Studebaker President... So many cars, so little time.
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Robert Camp Offline
Posting Freak
#28
"Imagine a "hot" air molecule versus a "cold" air molecule; the hot one contains more energy. Now contain an equal number of each type and then flow them through a fixed pipe vented to the outside (think pressurized container to low pressure outside air). Due to their higher energy state, the mass of molecules with high heat energy will have a higher pressure and will therefore produce a faster/more powerful flow through the exhaust tube than the cold gas mass. In our case that equates to more exhaust "thrust" spinning the turbine side of the turbo.

Higher exhaust heat therefore does increase the effiency of the turbo, it's just not the entire story."

Actually, that doesn't work either. Heat energy is random motion. It's still just the mass-velocity relationship of the gas thru the turbine. If that remains the same it doesn't matter if it's hot gas or cold gas. The heat does provide a convienent method of creating a high pressure gas to blow thru the turbine. If cold gas is pressurized to a similiar value it would spin the turbine just as well. Actually, the cold gas wouldn't have to be at as high a pressure. It would be a denser mixture and less pressure would be required to equal the same mass-velocity relationship.
Robert Camp
'86 Medium Regatta Blue TC, 5-speed, original owner.
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