I took some measurements and did the math. The area of the vacuum side of the FPR diaphram is 1.6 sq/in. I can reduce the area of the fuel side of the diaphram to 1.0 sq/in. Will this give me a rate of approx. 1.6:1? TIA, -Mike ========================================== Mike Pitts Delray Beach, FL mpitts at emi.net ==========================================