I have seen in many places the calculated (using Bernoulli theory) limit of airflow of 146cfm/in² with a D/P of 28"wc. This holds very true when flow testing intake ports on cylinder heads. The very best intake ports can flow close to 140cfm/in² at the throat area (mcsa) of the port.
Why is it...
I have a need for a circuit that has an input range of 0 - 5 VDC with an adjustable output voltage limit and adjustable(near unity) gain for an output between 0 and 5 VDC. Single rail 5V-10V Power Supply needed.
I found a couple of TI op-amps (opa688 or opa689) that should do it except the...
When porting a set of heads there are ways to enhance high, mid or low lift flow characteristics. I realize the ideal is to gain at all lifts but sometimes there is a tradeoff.
Which one would you trade for what other one? and why?
I profiled a cam which has .800" net lift thru its entire...
