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Originally Posted by jspecracer7' post='795079' date='Jan 19 2006, 05:01 AM
Who told you that? https://www.nopistons.com/forums/pub...1047683664.gif 10 psi on a stock turbo vs. 10 psi on a greddy T78. Now 20 psi on a stock turbo vs. 20 psi on a greddy T78. So they both will yield the same HP gain per psi? HP gain per PSI is dependent upon turbo effeciency in that range of boost. Some turbo's are more effecient down low ...say 15psi and below. Some turbo's are more effecient at "high boost"....say 21 psi and above. Yep, It's all about the volume or air and fuel @ that boost level that can get into and out of the combustions chamber in the amount of time it has to do so that will determine your HP as boost increases. As Jspecracer7 said, every turbo performs diffrently and this is why you have to choose a turbo that fits your application for the car. |
Originally Posted by nismo convert' post='795072' date='Jan 19 2006, 06:42 AM
General rule of thumb is 10 PSI is 100 hp, which is 10hp per psi. lol I hope your joking big guy |
What we DO know is 13b-TT=50k miles.
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Originally Posted by PhoenixDownVII' post='795099' date='Jan 19 2006, 10:03 AM
What we DO know is 13b-TT=50k miles. |
madz turdbo boostz = 10 madz qwick HP per PSIzzle
turdboo!!!!!!! |
Originally Posted by Il RX8 lI' post='795111' date='Jan 19 2006, 12:49 PM
Yea, it's like this: 13b-TT= 50k Miles 13b-T=150k miles 13b=200k miles 12a=250k miles+ See a trend? :P |
Not just the size of the turbine and it's efficiency range determine it either... a simple way of looking at it (very simplified) is that if you have a 1.5L motor running 15psi, you are packing 2x the air and fuel into it as if it was NA, so its kinda like running an NA 3L engine, minus the power loss required to drive the turbo. if you have a 2L engine running 15psi, thats still 2x the air and fuel, however now its like running a 4L engine. Still 15psi, but a greater volume of air and fuel, and thus more power per psi of boost. basically, nothing can be generalized with turbos, besides their effect on the longetivity of rotary engines as stated above.
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and it does matter on the turbo,
for example on my audi a GT30R with an a/r ratio of .63 would put my audi at about 575 hp and having full boost around 4k rpm's compared to stock at like 200.... at the same time a GT30R with an a/r ratio of .82 would make somewhere around 600+ hp, but would not spool up untill much later maybe 5.5k rpm both these turbo setups would run the same boost it all matters on the setup and the turbo sizing.... |
Originally Posted by PhoenixDownVII' post='795146' date='Jan 19 2006, 04:00 PM
Yea, it's like this: 13b-TT= 50k Miles 13b-T=150k miles 13b=200k miles 12a=250k miles+ See a trend? :P |
Yes I should have specified, I did mean stock turbo, but I tend to assume too much. My bad.
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