Thermal/adiabatic efficiency of Corvette C6 ZR1 TVS2300 versus 2015 Corvette C7 Z06 TVS1740 - THE ACTUAL NUMBERS

This blog mentioned on several occasions not just misinformation but outright fraudulent claims made by the Corvette chief engineer +Tadge Juechter and +General Motors .  The outright lies and bullshit are no big surprise of course, this is how marketing works.  The fact that the Corvette C7 and especially C7 Z06 buyers are not just ignorant but as dumb as a door knob does not make the whole thing justifiable in any way but it certainly makes it easier to explain how GM can get away with this bullshit.

What is the number one reason Juechter claims for the small supercharger?  THE EFFICIENCY AND INSTANT RESPONSE.

This efficiency, just like the chassis rigidity is taken out of the context and creates a basis for the Oscar worthy bullshit show Corvette has ever seen.  According to Juechter, the smaller supercharger is more efficient because it creates less parasitic loss on the engine and has less internal leakage allowing for better VOLUMETRIC EFFICIENCY, better than the larger supercharger generated on ZR1.

What Tadge Juechter leaves out is the part about the THERMAL EFFICIENCY which should never be mistaken with the volumetric efficiency.  In case of Roots type supercharger, volumetric efficiency takes precedence over thermal efficiency at low boost levels (5-6 psi) achieved at MODERATE supercharger speeds.

What is the THERMAL EFFICIENCY of TVS1740 at the maximum boost in Z06?  The number is apparently a deep secret but why not disclose it anyway?  42 PERCENT is the thermal efficiency of the TVS1740 as used in C7 Z06.  How does this compare with the TVS2300?  The thermal efficiency of the TVS2300 is 51 PERCENT!!!  Quite a difference, ain't it? 

To make clear, even though the efficiency of ZR1 supercharger is higher, it is still pretty shitty.  To consider a supercharger thermally efficient, this number should be about 72-75 percent.

What does this thermal efficiency means?  In plain language, what this means is that 58 percent of the power used to run the supercharger generates HEAT,instead of displacing air.  Of course, the heat does not just magically disappear, it ends up in the engine, further adding to the overheating issues of the newest flagship piece of shit called Z06.

Here is another pair of numbers Tadge Juechter does not want the buyers to realize: the supercharger output temperature.  This temperature is a mind boggling 278 degrees for the C7 Z06 and quite a rise from the ZR1 241 degrees.

Again, the ZR1 set up is far from being perfect but it is way superior to the new system and it should have served as a warning sign to look for another solution.  The only gain from this shitty set up is better off the line response-until heat causes timing to be pulled back.

The ironic part here: it is considerably easier to increase ZR1 off the line response than for Z06 to improve top end performance, in fact it is not even possible for Z06 to make such improvement in a sustainable way.

Strangely enough, neither Tadge Juechter or GM marketing ever mentions this part, what happened to full disclosure?

Considering this information, it is not all that difficult to figure out why the new flagship is plagued with overheating issues while on the track.  The thing is this is still winter, how much worse will the overheating problems get when someone attempts to track this car after the weather warms up? 

What is really quite disturbing is the fact that Tadge Juechter refuses to disclose these problems to the buyer.  There would be no shame in advising the buyers to limit their activities to the Cars and Coffee and golf course track duties...