THE SHOP

Performance & Hotrod Business - January '15

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January 2015 n Performance & Hotrod Business n 25 ing a common misconception and gives us a bunch more. "Right-sizing the pump for an applica- tion is a big issue. Many racers go for the 'bigger is best' notion, and in cases where efficiency is not necessarily an issue that may be OK. In racing, although fuel econ- omy may not be critical, fuel temperature can have an effect on performance and if a pump is grossly oversized, a lot of energy is put into the fuel by recirculating the fuel. If the fuel is not highly recirculated, then it will have a lower temperature at the injec- tor. In terms of fuel compatibility, fuel pumps that have exposed copper com- ponents will have a shortened life when exposed to fuels that have high concentra- tions of alcohol. This holds true for E85, E100 and M100." Concialdi adds that the size of the tube used to transfer fluid to the fuel injectors is also a critical component. "It makes no sense to have a pump that discharges 400 lph when the balance of the fuel system can only handle 250 lph," he explains. "That just works the pump harder, puts heat into the working fluid and wastes energy. In the case of the EVO- X, we have seen big fuel pumps installed into a system that has only a -6 hose size, which is hardly large enough to work with a 400-lph pump. There is a distinct lack of an electric fuel pump that can supply sufficient alcohol-based fuels for very high- powered engines." Kyle Fickler of Aeromotive Inc. also believes there can be too much of a good thing when it comes to pump choices. "The phrase 'bigger is better' comes to mind, particularly in continuous duty applications," he says. "The flow rates of modern fuel pumps make it easy to buy a pump much larger than what your appli- cation needs, resulting in excessive flow rates at low demand, which can potentially overheat the fuel, creating suction side cav- itation. Aeromotive offers our Billet Fuel Pump Speed Controller to help in appli- cations where a very large fuel pump is required for high demand, and will reduce flow for steady-state cruising, but if you don't need a large pump for high demand, A fuel pump is just part of a system that needs to be planned properly, particularly in competitive environments. Fuel pump placement, filtration, fuel line sizing, fittings and tank ventilation are all things that should be considered in a properly installed fuel sys- tem. (Photo courtesy Fuelab) Think of fuel delivery as a system, and edu- cate your customer to think of it as a system as well. (Photo courtesy Aeromotive Inc.)

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