how dou figure bost +hp?
i mean if u ruuning 10lb of boost how much hp is that ? |
depends on what you're pressurizing to 10psi!
10psi on a sewer pipe is a lot of water, but 10psi on a stir straw isnt |
Originally Posted by j9fd3s' post='794992' date='Jan 18 2006, 10:23 PM
depends on what you're pressurizing to 10psi! 10psi on a sewer pipe is a lot of water, but 10psi on a stir straw isnt yea bout im talking about boost not water how to translate boost to hp? |
it all depends is what he is saying, i mean 10 psi on a built engine will make more power than 10 psi on a stock engine... we need more info on the engine
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Someone told me that an average 4cyl. 1 psi=7hp, but on a bigger motor or on a rotary you should get more than that. I have heard you will get about 14hp out of 1psi. I don't know if that is accurate or what variables it is based on, but that is what I have heard.
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Originally Posted by 1979rx7' post='794994' date='Jan 18 2006, 06:26 PM
yea bout im talking about boost not water how to translate boost to hp? it depends on the turbo/engine. the 917/30 ran about 14psi and 1100hp, but 14 psi on a stock turbo fc turbo motor will get you about 240 |
General rule of thumb is 10 PSI is 100 hp, which is 10hp per psi.
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that is such BS
it all depends on the engine and turbo size. |
Originally Posted by 1979rx7' post='794994' date='Jan 19 2006, 11:26 AM
yea bout im talking about boost not water how to translate boost to hp? Mike's analogy is correct. Replace the word water with air and it makes sense. |
Originally Posted by nismo convert' post='795072' date='Jan 19 2006, 08:42 PM
General rule of thumb is 10 PSI is 100 hp, which is 10hp per psi. 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. |
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