Hi guys, my fuel system keeps getting hot and I can't figure it out.
Car & Fuel system details:
*Highly modified RB25 with a Wolf 3D V4 ECU
*The fuel system is a Walbro in tank pump with pick up > 10L surge tank > x2 Bosch 044 pumps > twin entry fuel rail > ID 1000cc injectors > return line back to surge tank.
Problems:
*The two Bosh pumps slowly get noisier the further I drive, their not running dry as I keep checking the surge tank and it's always full, after an hour drive you can hear the wine outside the car.
Notes:
*The pumps, surge tank, fuel rail and intake plenum are all hot to touch.
*None of the fuel system is near the exhaust or heat source.
*Pumps are quiet on start up and for the first 20mins of driving before slowly getting louder.
*No blockages in pipes, brand new fuel filters and fuel reg, fuel pressure is stable, constant and accurate.
*I had the car re tuned from avgas to pump fuel (BP Ultimate) 2 months ago in Tas and have since moved to QLD and know that I need to get the tune touched up for the temperatures and humidity levels etc up here.
Any ideas or suggestions for my problem? pumps on their way out, AFR needs adjusting, or it's just in the tune etc?
Thanks for any help and suggestions guys =)
Scott