The fuel lines supplied plug right into the factor disconnects and a wiring solution is provided with it's own fuse and relay. Radium now sells a surge tank specifically for the S2000 that is pretty close to plug and play. I was trying all these options because a well engineered surge tank didn't exist at the time and I didn't want to hack into factory wiring and fuel plumbing for reliability and safety reasons. This seemed to make a small difference but didn't solve it completely. I also redirected the fuel return to the bottom of the basin to insure that all the return fuel was filling the basin rather than bouncing off the pump and spraying all over. I also fabricated a baffle that is mounted to the fuel pump hanger and sits inside the right hand wall of the pickup basin to reduce the chance of fuel sloshing out of the basin on left handers. Often this results in a sputter at corner exit. I have dozens of datalogs showing the drop in fuel pressure. Fuel pressure is measured at the rail and datalogged using a Racepak G2X. Even with a full tank of fuel and the accumulator, I can get fuel pressure drops if the corner is long enough. Car puts down about 360-370 whp and runs 725cc/min injectors and a DW200 fuel pump. In the last few years, I've been racing time trials while supercharged. This allowed me to run with less than 2 gallons without fuel starve. I solved that by using a custom built fuel accumulator. During auto-x events, I'd get fuel starve with less than 3/4 tank. I've had fuel starve issues with this car since day one (back in 2002) when racing auto-x, track days, and time trials.
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