Can anyone give some feedback on fuel mileage degradation on adding a ZR-1 camshaft and changing the lower pulley and injectors?
Does one have a higher impact over the other?

I have done the following to my 09 CTS-V

- 2.55 inch diameter steel supercharger drive pulley - powder coated black - 8 rib
- 8 rib serpentine belt
- Lingenfelter LS9 solid supercharger isolator coupling
- Port and polish supercharger snout
- Stainless Long Tube Headers, X-pipe & Hi flow cats
- Corsa Sport exhaust
- Lingenfelter air intake duct
- Increased boost level 12 - 13 psi

I am considering the two mods above but am curious (not overly concerned) about the fuel mileage. I never bought this car for efficiency although it has been great and unchanged with the mods I currently have.

I can do these separately or together, even one and not the other.

Lower pulley upgrade and change injectors
ZR-1 Camshaft

Thoughts anyone?

 

customers i do cam swaps for don't drive they're cars enough to notice/report fuel economy. But, I will tell you, it is all in the tuners ability to control the cars fuel consumption on decel, and part throttle.