How much boost = compression
#12
Thread Starter
Senior Member
Posts like a Northstar
Joined: Jan 2003
Posts: 511
Likes: 0
From: Northern KY
I really need to find my sciance book to see if it has the conversions so I can figure out the flow rate for a 120CU ft tank at 3500psi or 120Cu Ft. at 238.095 atm
1 atm = 14.7 psi
3500psi / 14.7 = 238.095 atm
So the engine at 4000rpm uses 534.72 CFM being pulled from ~1ATM and the tank being reduced to 1atm would be 120cu ft x 238.095 = 28571.4cu ft at 1 atm
28571.4 / 534.72CFM = 53.43 so if the valve would allow the tank to flow there it would beable to support the engine for ~53.5min @ 4000RPMs
So I think if a NA engine was pulling 534CFM and I add pressurised air to the intake it would add some boost or some what of a Ram air affect
1 atm = 14.7 psi
3500psi / 14.7 = 238.095 atm
So the engine at 4000rpm uses 534.72 CFM being pulled from ~1ATM and the tank being reduced to 1atm would be 120cu ft x 238.095 = 28571.4cu ft at 1 atm
28571.4 / 534.72CFM = 53.43 so if the valve would allow the tank to flow there it would beable to support the engine for ~53.5min @ 4000RPMs
So I think if a NA engine was pulling 534CFM and I add pressurised air to the intake it would add some boost or some what of a Ram air affect
#14
CFM
In order to pressurize the intake, you would need to first make up all of the required CFM and then you would see an increase in boost. IMHO, I wouldn't add pressure to an already weak plastic intake.
#16
Re: CFM
Originally Posted by salmanman
231 Cu. in / 1728 = 0.1337 cu ft
X 4000 RPMs = 534.72 CFM........
Alot of air.............
X 4000 RPMs = 534.72 CFM........
Alot of air.............
The calculation I've seen is RPM x displacement / 3456. That'd make it 401cfm at 6000rpm. Thats also assuming a 'doesn't have it' 100% VE.
Thread
Thread Starter
Forum
Replies
Last Post
Toddster
Trouble shooting + Test Procedures
0
03-21-2009 06:24 PM