FI Decision Thread
03-24-2010, 01:09 PM
#98
Why thank you lol
Exactly, but those don't occur for free do they? Compressors would have to work harder to generate the same hp if your setup is less efficient. Meaning even though you're seeing 6 psi at the manifold, it could be up to 10 psi right at the compressor.
Actually according to your equation, they're inversely proportional
You seem to have ignored a very important factor in that equation, and that is Temperature, PV does not equal to a constant, but rather mRT (and that's assuming 100% Volumetric Efficiency, which we both know is not the case)
Boyle's law only applies when your temperature is kept constant bro
For a fixed amount of an ideal gas kept at a fixed temperature, P [pressure] and V [volume] are inversely proportional (while one increases, the other decreases).
Exactly, but those don't occur for free do they? Compressors would have to work harder to generate the same hp if your setup is less efficient. Meaning even though you're seeing 6 psi at the manifold, it could be up to 10 psi right at the compressor.
Actually according to your equation, they're inversely proportional
You seem to have ignored a very important factor in that equation, and that is Temperature, PV does not equal to a constant, but rather mRT (and that's assuming 100% Volumetric Efficiency, which we both know is not the case)
Boyle's law only applies when your temperature is kept constant bro
For a fixed amount of an ideal gas kept at a fixed temperature, P [pressure] and V [volume] are inversely proportional (while one increases, the other decreases).
And how does it matter how much pressure is generated at the compressor? In the end, it is the amount of air and fuel inside the engine that determines how much power is made. At the manifold, right before the entry into the engine, both system has the same amount of air. They should be making the same GHP.
03-24-2010, 01:25 PM
#99
Administrator
03-24-2010, 01:45 PM
#100
I did not say anything like that. I've been saying all along, that given the same boost pressure, and similar amounts of air in the engine, both TTed and SCed G37s should be making the same Gross Horsepower. However, where that power is being used differs.
03-24-2010, 02:49 PM
#101
PSI is simply a measurement of pressure. Volume is what ultimately matters.
Take a regular straw and a coffee stirrer. Blow through them as hard as you can. The coffee stirrer has more psi, but the regular straw has more volume. Which would you use to drink a soda with?
The exact same concept applies to FI on an engine. It is very possible to run lower psi and still net more horsepower; volume (technically mass) of the air going into the engine is all that matters, when it comes to producing a raw HP number.
Regardless, it's your decision no matter what it's based on...I was just curious.
03-24-2010, 06:37 PM
#105
It's you two arguing over who's right about details related to how forced induction works. This thread is about deciding on the GTM SC system or the Stillen system. Point out to me where your discussion is telling me something that makes one system better than the other and why I should chose it...then I might find it relative. So far all I see is you arguing with Sam. Try to be less of an ahole too.