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PaleMelanesian · 10-09-2009, 06:10 PM

I had a 1990 Suburban, and tried some of that stuff. CAI, headers, free-flow exhaust, K&N filter, fuel line magnet (

)... It made it louder. It might have made it faster, but it was still a suburban (= slow). It didn't help with mpg at all. This was before I did any ecomodding or hypermiling, but I have always checked mpg at the pump.

The throttle body spacer *might* help, by lowering the resonant frequency of the intake. It might help if it improves low-rpm torque and power, since that's where you actually drive.

10-09-2009, 06:10 PM	#6 (permalink)
PaleMelanesian Master EcoModder Join Date: Dec 2007 Location: Texas Posts: 1,402 PaleCivic - '96 Civic DX Sedan Team Honda 90 day: 72.37 mpg (US) Thanks: 123 Thanked 123 Times in 87 Posts	I had a 1990 Suburban, and tried some of that stuff. CAI, headers, free-flow exhaust, K&N filter, fuel line magnet ()... It made it louder. It might have made it faster, but it was still a suburban (= slow). It didn't help with mpg at all. This was before I did any ecomodding or hypermiling, but I have always checked mpg at the pump. The throttle body spacer might help, by lowering the resonant frequency of the intake. It might help if it improves low-rpm torque and power, since that's where you actually drive. __________________ - - - - -Best 11-mile commute: 105 mpg - - - - -Best tank: 88.5 mpg / 1133 miles