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Thanks Jeff C
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(motors are similar at the end of the day no matter what they are in).
If you guys can't tell the difference between PSIG and PSIA then you are in trouble and should leave the tough stuff to AC. Those are some fancy formulas up above but you are making this way more complicated and inaccurate than it needs to be. 12 PSIG is 12 PSIG no mater if you are at sea level or at 10,000 feet your ambient pressure will not affect the final pressure in your cylinders if your boost gauge is reading 12 PSIG.
I will say it again as some will not get it the first time. If at sea level your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. If at 10,000 feet your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. It is very simple. No mater how you look at it 12 PSIG is 12 PSIG is 12 PSIG. If your boost tee can automatically compensate for elevation changes then you will never have to manually adjust your boost tee to compensate. And yes your compressor will be spinning faster to achieve the 12 PSIG at 10,000 feet but it will still only be 12 PSIG in your cylinders. To say that you will have to run 16 PSI to make up for ambient pressure changes is just........I can't think of a nice word to put there so I will leave it blank. Thank you for the mind numbing read.
If you guys can't tell the difference between PSIG and PSIA then you are in trouble and should leave the tough stuff to AC. Those are some fancy formulas up above but you are making this way more complicated and inaccurate than it needs to be. 12 PSIG is 12 PSIG no mater if you are at sea level or at 10,000 feet your ambient pressure will not affect the final pressure in your cylinders if your boost gauge is reading 12 PSIG.
I will say it again as some will not get it the first time. If at sea level your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. If at 10,000 feet your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. It is very simple. No mater how you look at it 12 PSIG is 12 PSIG is 12 PSIG. If your boost tee can automatically compensate for elevation changes then you will never have to manually adjust your boost tee to compensate. And yes your compressor will be spinning faster to achieve the 12 PSIG at 10,000 feet but it will still only be 12 PSIG in your cylinders. To say that you will have to run 16 PSI to make up for ambient pressure changes is just........I can't think of a nice word to put there so I will leave it blank. Thank you for the mind numbing read.
If you guys can't tell the difference between PSIG and PSIA then you are in trouble and should leave the tough stuff to AC. Those are some fancy formulas up above but you are making this way more complicated and inaccurate than it needs to be. 12 PSIG is 12 PSIG no mater if you are at sea level or at 10,000 feet your ambient pressure will not affect the final pressure in your cylinders if your boost gauge is reading 12 PSIG.
I will say it again as some will not get it the first time. If at sea level your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. If at 10,000 feet your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. It is very simple. No mater how you look at it 12 PSIG is 12 PSIG is 12 PSIG. If your boost tee can automatically compensate for elevation changes then you will never have to manually adjust your boost tee to compensate. And yes your compressor will be spinning faster to achieve the 12 PSIG at 10,000 feet but it will still only be 12 PSIG in your cylinders. To say that you will have to run 16 PSI to make up for ambient pressure changes is just........I can't think of a nice word to put there so I will leave it blank. Thank you for the mind numbing read.
If you guys can't tell the difference between PSIG and PSIA then you are in trouble and should leave the tough stuff to AC. Those are some fancy formulas up above but you are making this way more complicated and inaccurate than it needs to be. 12 PSIG is 12 PSIG no mater if you are at sea level or at 10,000 feet your ambient pressure will not affect the final pressure in your cylinders if your boost gauge is reading 12 PSIG.
I will say it again as some will not get it the first time. If at sea level your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. If at 10,000 feet your boost gauge is reading 12 PSIG, your cylinders will have 12 PSIG in them. It is very simple. No mater how you look at it 12 PSIG is 12 PSIG is 12 PSIG. If your boost tee can automatically compensate for elevation changes then you will never have to manually adjust your boost tee to compensate. And yes your compressor will be spinning faster to achieve the 12 PSIG at 10,000 feet but it will still only be 12 PSIG in your cylinders. To say that you will have to run 16 PSI to make up for ambient pressure changes is just........I can't think of a nice word to put there so I will leave it blank. Thank you for the mind numbing read.
OK...I guess I need to qualify "motors are similar". Meaning, they perform an identical cycle. Yes, I get it, they have different parts and configurations.
As for the PSI thing...I can't tell if mynewusadalmao is being serious. You have two types of pressure: absolute and gauge. Absolute is what the atmosphere naturally maintains. Gauge is anything beyond that and it is relative. Absolute at sea level is 14.7PSI. So, if you boost 13 lbs, you are at 27.7PSI at the intake. At 10k ft, you have 10.2 absolute. So, to make 27.7 absolute, or the same pressure and power, in theory, you need 17.5PSI gauge.
Also, oxygen at elevation is still at the same ratio to the other gases (mainly Nitrogen) as at sea level...it's just less dense. So, if you compress it more you have the same oxygen level (in theory but it will vary).
So, yes, you do need more PSIG at elevation than sea level to make similar power.
Does the boost guage show zero at any altitude.
If that the case I can buy that you need more boost at altitude.
If I have understand it right you need too raise the boost more at altitude. But the presure in the mainfold is the same.
Boost pressure= the rise in pressure from atmosphere.
Mainfold pressure= the pressure in mainfold. (where you should see som minus reading at no boost)
btw, what pressure should one ride in the floatshocks at high altitude?
OK...I guess I need to qualify "motors are similar". Meaning, they perform an identical cycle. Yes, I get it, they have different parts and configurations.
As for the PSI thing...I can't tell if mynewusadalmao is being serious. You have two types of pressure: absolute and gauge. Absolute is what the atmosphere naturally maintains. Gauge is anything beyond that and it is relative. Absolute at sea level is 14.7PSI. So, if you boost 13 lbs, you are at 27.7PSI at the intake. At 10k ft, you have 10.2 absolute. So, to make 27.7 absolute, or the same pressure and power, in theory, you need 17.5PSI gauge.
Also, oxygen at elevation is still at the same ratio to the other gases (mainly Nitrogen) as at sea level...it's just less dense. So, if you compress it more you have the same oxygen level (in theory but it will vary).
So, yes, you do need more PSIG at elevation than sea level to make similar power.