Posted By Matthew Jones on 10 Nov 2016 12:17 PM
I'm just trying to keep weight down on race day. So I don't want to fill up and add an extra ~60lbs
I suppose there's something to that depending on each car design. 6lb/gal is pretty much accepted wt of fuel now with the ethanol weighing even less. The Japanese design drivers are lighter than I am at 240. Depends if the car suspension was designed to have decent corner weighting with a certain size driver and a full tank of fuel or an empty tank? Someone on this board knows that info. By all accounts I've read your car is softly sprung and likes to lean in stock form.
No one allows refueling on the grid anymore that I'm aware and one cannot leave grid once there or will be disqualified at a major event due to leaving before impound. Big gamble running out or starving the car in corners on your last run. Happens all the time here when we do 5-6 runs:)
Most newer cars are perfectly happy with the low fuel light on now that there is no return fuel line to the tanks for pump cooling. Are you planning on opening up the fuel rail to drain the tank? Sounds like a very bad idea.
I never run my cars with less than a 1/4 tank which in reality is about 5 gallons. My RX8 low fuel light comes on at only 2 gallons and it's a gas hog WOT so I would run out. If I have a co-driver I start with at least 1/3 tank which is about 6 or just fill it up so the car rotates better and no sloshing whatsoever.
Better you should index your plugs and get a killer alignment.