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After witnessing us goofing off, a driver in an Evo X decided to try his luck at the Tundra and was quickly taken down, the look on his face was worth it as the super house rocketed away. There was a cost to all of this fun and we were dismayed that our first tank of fuel returned a dismal 9 mpg, the result of driving around with our feet to the floor all over the place laughing with tears in our eyes. For our next tanks of fuel we were much more disciplined and drove the truck like usual. Sure enough the Tundra returned the same 14-19 mpg average that it had before the supercharger, possibly better, the TRD engineers were right.
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| Next, it's time to install the higher capacity fuel pump. The fuel pump is located inside the fuel tank so the tank has to be removed. Howard loosens the bolts holding the retaining straps down. |
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| Then uses a tranny jack to lower the tank. It helps if you start the installation with a close to empty tank. |
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| The fuel pump lives under here. |
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| Remove the lock ring and lift out the pump basket. |
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| Remove the old fuel pump. |
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| Here are the injectors, fuel pump and colder spark plugs. |
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| The new pump drops right in. |
We figured that this was for a couple of reasons, one on part throttle a bypass valve opens and the supercharger does not make boost reducing pumping losses. Under these conditions the intercooler is still working and the engine is effectively getting a nice cold intake charge. When towing we used much less throttle than before and the truck returned better than stock highway mileage as long as we avoided running way above the speed limit and wide open throttle. Our supercharged Tundra gets better highway mileage than a friends F250 SD Diesel.
