Originally posted by DemonSVT:
I know why he used it...
Because it acts like intercooler pipe size does. A larger diameter "throttle body in this instance" would decrease the amount of boost generated (or PSI drop) and also increase the boost lag.
This is another example of when larger isn't always better.
Also this only applies to forced induction engines. A N/A engine pulls air in and then a larger opening would allow for more air flow. Velocity & pressure drop are not a factor.
Actually, boost is only a measure of back pressure. If you open the intake and lose 1# of boost, are you getting any less air in? No, you are getting more air in, just less back pressure.
Please don't correlate more boost = more HP. More boost does = more backpressure.
Regards,
