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Re: Fuel Pump
A 255LP pump flows almost the same amount of fluid as a 255HP at idle fuel pressures, so it can give you overrun problems. The 255HP just flows a bit more at high fuel pressures. As Chris said, a 190 is more than enough for most people. The 190s are terrible at high pressures though, but if you don't plan on making over 400HP, they will do. We totally maxed an old un-rewired Denso 150lph at about 400whp, but they actually flow more than the 190 at high fuel pressure. The stock EVO 8 fuel pump performs about the same as the old Denso 150lph. 2G fuel pumps also flow a little bit more than 1G fuel pumps. Cher totally maxed his non HP Walbro 255 out at 600whp. My Supra pump was starting to drop pressure, but I wasn't totally out of fuel yet, at a little over 600whp.
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