how deep do you want to go? View attachment 13215
thats the compressor map for the supercharger. Rpm x pulley ratio gives you charger speed. There is obvious diminishing returns from a cooling system that pumps a higher flow rate through the same sized cooling surface area (the front mount intercooler) because of the time component thermal loss over a given surface. With two pulleys I am at the edge of the map at redline rpm where the charger is least efficient. Heat soak does become an issue. For my purposes I chose not to get into pv=nrt and all that and trust the guys at VelocityAP and superchargersonline (engineers or para) and a few cobalt ss and jag forums (anecdotally) and their combined understanding that a higher flow pump would be better, to a point. That combined with the fact that the VAST majority of my needs is torque from 2000-3600 rpm. Which is pretty much below the “totally inefficient charger” zone. And also it’s a cheap part to swap. So why not? I have not dynoed it because I don’t care enough andseat of the pants and VelocityAP dyno testing is enough for me.
This is really just a tangent, but if you're posting compressor maps I'm guessing you might know the answer: Do you know if the ECU is maintaining absolute or relative pressure increase over ambient? I'm living at 5000 and regularly climbing to 11,000+, and I'm curious what kind of hit in power I'm taking... or if I'm just moving to the right on the map and increasing charge temp ?
Thanks for any insight!