I guess this thread isn't about a fuel delivery issue as much as it as about a fuel temp issue - although they can be some what related. Funny how this topic often pops up around this time of the year when stations are switching over from winter ( 14-16 RVP ) to sommer ( 8 - 10 RVP ) - expressed in PSI - blend. BTW, race gas is usually in the 5-7 RVP range, so not a problem. Cold climate areas also are the most effected as the change over has the biggest RVP swing. There aint no real good solutions for your high powered street machine, but here are some that may help. As said, a fuel return line system will help a little ( not for pre-soak issues though ). Dump your existing winter gas ( if your car has sat for a while ) and put it in the grocery getter ). Fill up from a station that is always busy - best chance to get summer fuel. Run a carb insulator type spacer. Lose those pretty stainless jacketed fuel lines and replace them with ANYTHING not covered with a steel braided jacket. Run the lines / regulator as far away from the engine as possible. Get the heat out of the engine bay. Run electric fans for a few minutes after shutdown - like at the gas pump while you are filling up or - raise the hood. Remove the inner fenderwell splash guards. Raise up the back of the hood an inch or two ( ala old school ). Run a 160 stat - if your system can stay on it - or no stat. Insulate your headers - and fuel lines. BTW, the fuel in the old Thermoquad ran about 10-15 degrees cooler with their plastic fuel bowls ( guess this problem has been around for a while ). Looks like the new Demon street carbs are trying to address it also. IMO, the biggest problem is heat trapped in the engine bay. What ever you can do to reduce it will be the biggest help in solving this problem.