gdizzle Posted March 7, 2006 Report Share Posted March 7, 2006 Oh man. I feel stupid. Your right.you're :lol: Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 I just checked. When I added the new turbo my stroke did indeed decrease. Who knew!! Link to comment Share on other sites More sharing options...
the underlørd Posted March 7, 2006 Report Share Posted March 7, 2006 Isn't CR is is how much the air compresses, ? Like if you take 10 liters to 1 liter thats a 10:1 So if you do it at 20000 psi its still 10:1 just a lot more mass, the ratio stays the same ?or am i wrong? Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 Isn't CR is is how much the air compresses, ? Like if you take 10 liters to 1 liter thats a 10:1 So if you do it at 20000 psi its still 10:1 just a lot more mass, the ratio stays the same ?or am i wrong?Doesn't work that way. Your confusing A/F ratio with compression ratio.Why bother to have a turbo then? Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 Isn't CR is is how much the air compresses, ? Like if you take 10 liters to 1 liter thats a 10:1 So if you do it at 20000 psi its still 10:1 just a lot more mass, the ratio stays the same ?or am i wrong?LOL this topic. 85% of people exited to google not back to the site I am sure CJ was just thinking of something else. We all have those days.Doesn't work that way. Your confusing A/F ratio with compression ratio.Why bother to have a turbo then?No. Your confusing chapstick with compression ratio. If you want I will lock this topic for you. Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 ratio Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 ratioROFLDid you even read the button for what it caculates?HAHAHAHAH Link to comment Share on other sites More sharing options...
javadoc Posted March 7, 2006 Report Share Posted March 7, 2006 <Takes popcorn out of microwave... reclines chair> Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 <Takes popcorn out of microwave... reclines chair>Regardless of air density due to altitude it still shows different CR at any given level under different amounts of boost. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 Regardless of air density due to altitude it still shows different CR at any given level under different amounts of boost.Alright kack mopper. IF you want to change this we can. But the engines compression ratio is static. Were not talking boost ratio, fuel ratio, farts to mpg ratio. A cylinders compression ratio is static Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 Alright kack mopper. IF you want to change this we can. But the engines compression ratio is static. Were not talking boost ratio, fuel ratio, farts to mpg ratio. A cylinders compression ratio is staticengine logicsChange any of these numbers, and the point at which the compressor runs at changes. More engine rpm means more air flow, so the operating point moves to the right. Colder intake temperatures means more pounds of air which moves our point to the right. Raising the boost probably means more air into the cylinders, but also the compression ratio goes up so our point definitely moves up and should move right. And so on.I must be missing something. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 engine logicsI must be missing something........I am almost too tired..... almost!Go read your own post again Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 .......I am almost too tired..... almost!Go read your own post againIf you have 10:1 CR at 14.7 atmospheric pressure without boost and you add 15psi boost you in effect have 29.7 absolute psi. This in essence doubles your volume in the same compression chamber. Which increases the CR to 20:1 It is call dynamic compression ratio.Schools out. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted March 7, 2006 Report Share Posted March 7, 2006 If you have 10:1 CR at 14.7 atmospheric pressure without boost and you add 15psi boost you in effect have 29.7 absolute psi. This in essence doubles your volume in the same compression chamber. Which increases the CR to 20:1 It is call dynamic compression ratio.Schools out.Worst post yet. Try againThe compression ratio is a single number that can be used to predict the performance of any internal-combustion engine. It is a ratio between the volume of a combustion chamber and cylinder when the piston is at the bottom of its stroke, and the volume when the piston is at the top of its stroke. The higher the compression ratio, the more mechanical energy an engine can squeeze from its air-fuel mixture. Higher compression ratios, however, also make detonation more likely.The ratio is calculated by the following formula: \mbox{CR} = \frac { ( \pi b^2 s) / 4 + V_c } {V_c}, where b = cylinder bore (diameter) s = piston stroke lengthVolume, not mass. Schools in bitch Link to comment Share on other sites More sharing options...
Guest 300+_T5R_855 Posted March 7, 2006 Report Share Posted March 7, 2006 Worst post yet. Try againThe compression ratio is a single number that can be used to predict the performance of any internal-combustion engine. It is a ratio between the volume of a combustion chamber and cylinder when the piston is at the bottom of its stroke, and the volume when the piston is at the top of its stroke. The higher the compression ratio, the more mechanical energy an engine can squeeze from its air-fuel mixture. Higher compression ratios, however, also make detonation more likely.The ratio is calculated by the following formula: \mbox{CR} = \frac { ( \pi b^2 s) / 4 + V_c } {V_c}, where b = cylinder bore (diameter) s = piston stroke lengthVolume, not mass.So the volume doesn't change under boost. This is a blown engine not a N/A engine. Volume is not static.Wrong answer Che' You don't get to go to the lightning round Link to comment Share on other sites More sharing options...
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