psi output
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I don't know what you are asking but try this.
http://www.aspracing.com/frame.htm
Click left hand corner top (labeled online dyno)
http://www.aspracing.com/frame.htm
Click left hand corner top (labeled online dyno)
Last edited by REDC4CORVETTE; Dec 20, 2004 at 03:01 AM.
Melting Slicks
Joined: Apr 2000
Posts: 2,793
Likes: 46
From: Elizabeth City, NC
Originally Posted by dand1892
i was wondering if anyone knew where a calculator for psi to hp was and if they could post a link. thanks
There is no way to have an equation that will work all the time for this. 10psi on one car is completely different than 10psi on another car. Boost is directly realted to how much back pressure the air coming into the engine finds. A car with free flowing heads and intake may only show 3 psi with a standard 6psi setup. But with that 3psi will be making more power than say the stock car with 6psi. So to achieve 6psi on the free flowing motor, you need to move lots more air more air more HP. Hope that sort of helps, I tried to keep it nice and easily explainable.
Melting Slicks
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Originally Posted by dand1892
i was wondering if anyone knew where a calculator for psi to hp was and if they could post a link. thanks
(HP when car is NA) * (boost psi + 14.7) / (14.7) = new hp
This is a very general rule of thumb and doesn't take into account efficiency levels and parasitic losses and such.
300 hp * (6 psi + 14.7)/14.7 = 422 hp Pretty close to the 425hp that the LT1 supercharger kits claim at 6psi.
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
try to think in terms of mass air flow. boost is nothing more than backpressure of air going into the engine. many times, a car with good flowing heads/cam/intake will make more power with less boost because there is more air flowing through the engine.
CFM is where it's all about.
CFM is where it's all about.
