|
Originally posted by turbo8u
*People confuse BOOST with AIRFLOW, if you don’t ever go above 14.7psi, you are not boosting. You might only see power because of the increase in VE, a vivid example is vtec (variable valve timing focused on scavenging principles and different rockers and lift durations) so whats some ways to improve an VE?
Are you referring to 14.7 psi on a boost gauge?? If so, then this statement is way off. Boost gauges are calibrated to read 0 vac at 1 atm. When the gauge reads 14.7 psi, you are way over 100% VE.
I agree though that e-turbos and all equivalents are made strictly to make money off of suckers. The scary thing though is that I'll bet they make a lot of money hahaha.
B.T.W., You calculate Volumetric Efficiency by dividing the mass of air inducted into the cylinder between IVO and IVC by the mass of air that would fill the cylinder at atmospheric pressure (with the piston at BDC). Typical values range from 0.6 to 1.2, or 60% to 120%. You can't really calculate VE by HP, RPM and displacement. You might be able to get close, but it doesnt take into account variables like pumping losses, parasitic drag, thermodynamic efficiency and a few other things. It isn't that uncommon to get over 100% VE with a NA motor.
Matt
1995 Eclipse GS
2.0L, S16g Turbo, 8 Injectors, 26psi
1998 Eclipse GSX
2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...
|
