Quote:
Originally Posted by carbuff
Tonight while running through some datalogs from my tuning runs this afternoon I noticed something strange. My fuel pressure at the fuel rails is dropping at mid-to-high RPM. I did not expect to see that, so I'm wondering if this would be considered 'normal' or not.
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I am running the same Vaporworx system on my car, other than I have the CTS-V fuel pump rated at 380lph. I also have a 6AN line running from the fuel tank to the fuel rails. I am running my system pressure at 58psi and it never varies more than a couple of psi from idle up to peak rpm. My Vaporworx pressure sensor is mounted in-line very close to the fuel tank. I measured the system pressure at the fuel rail with a mechanical gauge.
I know the 5th generation Camaro LS3 fuel module is rated at 255lph, so depending on your HP level maybe you need more capacity on the pump? I don't think it's normal to drop 6psi, mine stays very consistant at 58psi.