Originally Posted by Roman@ESS
We do all of our US testing here in AZ each summer. All of the kits perform without issue here during the summer months. Due to the fuel quality limits of 91 octane your options are any kit except the VT2-650 which requires 93 octane.
With the added notion that any of the VT1 systems can be upgraded to higher boost/intercooled configurations (VT2-600/625) if more power is desired.