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The inlet of the fuel pump in a Road King tank as well as any I must assume is located at the lowest point so as to draw as much fuel that is left in the tank when it gets low. I think this is a common and logical conclusion. Previous past posts from this forum have suggested that installing a lift kit on a tank will directly reduce the available fuel due to the new angle of the tank. I installed a 2" inch lift kit on the front of my tank and a 1/4 spacer on the back mount of my 2003 RKC. Sitting level on a lift and floor and from the side, I see the tank as being level with an ever so slight upward curl at the very back by the seat. Given liquid will always find is level, and unless the inlet on the fuel pump is not at the lowest point of the tank, how will you NOT be able to access most of the fuel? Just an observation, but I put a level along the bottom of the tank and it is NOT higher at the front so all the fuel will still accumulate in the front where I assume the inlet is. Am I wrong?
The fuel pump pickup is near the middle. If you change the angle at all it may allow some fuel to pool away from the pickup. Or maybe nothing will change. It isnt any different than changing front wheel
size or different length shocks or loading the back with a passenger or luggage.
By now, I hoped someone who actually did a similar lift would volunteer some information. Without that, I will go after this in a slightly different way. Someone with better math skills than I have could calculate the precise angle change in tank position you have made, I will GUESS about 7 degrees up in the front. Before ever starting your engine, the gas in the tank will be positioned as if you are climbing a 7 degree slope or accelerating at a brisk pace, compared to the original position. The factory engineers allowed for these same situations with the ORIGINAL tank mount and fuel pump pick-up location. Now, when you accelerate or climb a 7 degree slope, you have doubled the rearward slosh effect from those conditions. Will it EVER be a problem? That depends on one thing, how low do you habitually allow your fuel to get before you refuel? If you pride yourself on putting 5.8 gallons into a 6 gallon tank, you will probably experience an occasional fuel starvation problem, but if you normally refuel at 1/4 tank remaining or higher, you will probably never have a problem. This will also change the gas gauge reading for a specific quantity of fuel in the tank and show slightly less than it would show for that quantity before the lift. The float is near the front of the tank.
Not sure what youre asking. The tank is flat bottomed, there are no baffles or containment around the pickup. So as it gets low, the engine starts to die under harder braking. Get it lower and itll start to die up and down steep(ish) hills.
change the tilt of the bottom and youll sharpen the point of fuel cut off. Will that be an improvement? Depends on your perspective.
will there be gasoline left in the tank? Yes. Same with stock level position. With such a minor tilt, I doubt its any quantitative difference.
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Road King Fuel Pump depth
