Guys, my 98 Cobra runs out of fuel at about 400rwhp. The 1st tune it peaked at 370hp @ 5200rpm. I removed the Vortech FMU and added a Walboro 255 pump, 42lb injectors and 90mm Lightning MAF. Also someone had a boost a pump installed so it was removed also. 2nd tune, 400 rwhp @ 5600 then out of fuel again. Replaced the fuel regulator. Removed the Walboro pump, replaced the basket, after butchering it for the Walboro install, and installed an Aviator fuel pump. 3rd tune, 426rwhp @ 6000, then out of gas.
I'm told the 98 fuel systems suck. What am I missing. Is the basket getting sucked dry? Test were made at 1/2 tank. I'm told the pump is controlled by a relay for above and below 3500rpm operation for quieter operation at low rpm. Anyone heard of this? If so , maybe a constant 12 to the pump will help.
Lastly, what did the S351's use? Dual pumps? BAPs? Any help is appreciated. Car should go 460-470rwhp @ 6800 without too much trouble. Thanks, Ron
I'm told the 98 fuel systems suck. What am I missing. Is the basket getting sucked dry? Test were made at 1/2 tank. I'm told the pump is controlled by a relay for above and below 3500rpm operation for quieter operation at low rpm. Anyone heard of this? If so , maybe a constant 12 to the pump will help.
Lastly, what did the S351's use? Dual pumps? BAPs? Any help is appreciated. Car should go 460-470rwhp @ 6800 without too much trouble. Thanks, Ron