ideal turbo b16
06-30-2004, 01:18 PM
#11
3.0 BAR
Join Date: Nov 2003
Posts: 2,200
Re:ideal turbo b16
I'm not on crack B!atCH! Im on LSD! Different DRUG!
Anyways show me your logic on how boosting at 10psi is different at different altitude. I'm trying to understand you. I've always thought boosting at 10psi is the same as boosting at 10psi because its a closed system and whatever the pressure is inside will be that pressure regardless of how dense the air is... If I'm wrong BLOW ME.
Stay off the crack. Seriously dude, itll ---- you up.
Ambient here in denver 12 psia
Ambient at sea Level 14.7 psia
at 10psig boost
Denver 22psia
Sea Level 24.7 psia
In denver you can boost 2.7 pounds more and have the same absolute pressure meaning same density assuming temps are the same meaning same power output. The only difference is your compressor is running a slightly higher pressure ratio.
Think befor you speak...or at least drive up here in denver and see if you feel a difference. Also im getting my turbo from down2turbo on ebay, rebuilt for like 400 with any wheel i want
Anyways show me your logic on how boosting at 10psi is different at different altitude. I'm trying to understand you. I've always thought boosting at 10psi is the same as boosting at 10psi because its a closed system and whatever the pressure is inside will be that pressure regardless of how dense the air is... If I'm wrong BLOW ME.
Originally Posted by 88b16civic
Originally Posted by B16Drag
Boosting 10psi at 6000ft is the same as boosting 10psi at 0ft!
Ambient here in denver 12 psia
Ambient at sea Level 14.7 psia
at 10psig boost
Denver 22psia
Sea Level 24.7 psia
In denver you can boost 2.7 pounds more and have the same absolute pressure meaning same density assuming temps are the same meaning same power output. The only difference is your compressor is running a slightly higher pressure ratio.
Think befor you speak...or at least drive up here in denver and see if you feel a difference. Also im getting my turbo from down2turbo on ebay, rebuilt for like 400 with any wheel i want
07-01-2004, 05:15 PM
#12
1.0 BAR
Thread Starter
Join Date: May 2003
Posts: 326
Re:ideal turbo b16
You know in this thing they call an internal combustion engine it mixes air and fuel together, heat happens, and work is done. The more air and fuel you can add and the more power you get. Its always easy to add more fuel (thanks TE), the way to get more power is more air. Either this is through better engine design (higher VE), bigger engine, or raising the DENSITY of the air charge.
You know that air does not get SUCKED into your engine. When the valves are shut and the piston moves down it creates a low pressure inside the cylinder. There is a higher pressure outside the cylinder. Fluid always flows from high to low. No air is when the ABSOLUTE pressure is 0. Atmospheric air is at sea level 14.7psi absolute (above 0 pressure) and here in denver is around 12psi absolute.
Simply, at a given temperature, the more absolute pressure, the more air molecules for that given space.
So when i floor it N/A I only see 12psia where you would see 14.7psia. If you drive here it feels like there is brick stuck behind the accelerator since its equilvilaent of having your throttle plate creating a 3 psi drop.
When boosting at 10psi , absolute pressure = ambient + boost
so for sea level
absolte pressure = 14.7 +10 = 24.7 psia
Denver psia = 12 + 10 = 22 psia
You still have more air
Me at 12.7 lbs boost you at 10 lbs
Sea level 14.7+10=24.7
Denver 12+12.7=24.7
For the same air temp same power output. The only difference is you compressor is working a little harder for me since im boosting 3 lbs more so i have a little more backpressure lowing my VE. But the force pushing down on the piston during the compression stroke should be the same (same power output) neglecting the change in VE.
You know that air does not get SUCKED into your engine. When the valves are shut and the piston moves down it creates a low pressure inside the cylinder. There is a higher pressure outside the cylinder. Fluid always flows from high to low. No air is when the ABSOLUTE pressure is 0. Atmospheric air is at sea level 14.7psi absolute (above 0 pressure) and here in denver is around 12psi absolute.
Simply, at a given temperature, the more absolute pressure, the more air molecules for that given space.
So when i floor it N/A I only see 12psia where you would see 14.7psia. If you drive here it feels like there is brick stuck behind the accelerator since its equilvilaent of having your throttle plate creating a 3 psi drop.
When boosting at 10psi , absolute pressure = ambient + boost
so for sea level
absolte pressure = 14.7 +10 = 24.7 psia
Denver psia = 12 + 10 = 22 psia
You still have more air
Me at 12.7 lbs boost you at 10 lbs
Sea level 14.7+10=24.7
Denver 12+12.7=24.7
For the same air temp same power output. The only difference is you compressor is working a little harder for me since im boosting 3 lbs more so i have a little more backpressure lowing my VE. But the force pushing down on the piston during the compression stroke should be the same (same power output) neglecting the change in VE.
Thread
Thread Starter
Forum
Replies
Last Post
airtonics
Engine Management
4
02-23-2004 02:12 PM
