2 2003_GT New Member Nov 5, 2008 69 0 0 Santa Fe, NM Mar 6, 2009 #1 Mar 6, 2009 #1 When im doing 75mph im at about 2500-2700 rpms is this i little high??? BTW i have 3.90 gears (just installed)
When im doing 75mph im at about 2500-2700 rpms is this i little high??? BTW i have 3.90 gears (just installed)
mustanggt04fast Member Mar 6, 2009 105 0 16 Mar 6, 2009 #2 Mar 6, 2009 #2 rpm that sounds about right i have 3.73s in my 2004 gt and at 75mph it runs around 2200 2400 rpms
Stan Weiss Member Dec 8, 2006 347 2 16 Philadelphia, PA Mar 6, 2009 #3 Mar 6, 2009 #3 2564 RPM = 75 MPH with 3.90:1 and 245-45-17 tires I have some Interactive JavaScript calculator on my web site -- Automotive Performance Software / Interactive JavaScripts Calculators Calculate RPM given Speed(MPH), Rear Gear Ratio and Trans Gear Ratio
2564 RPM = 75 MPH with 3.90:1 and 245-45-17 tires I have some Interactive JavaScript calculator on my web site -- Automotive Performance Software / Interactive JavaScripts Calculators Calculate RPM given Speed(MPH), Rear Gear Ratio and Trans Gear Ratio