Ride Height Measuring Question
Posted: Tue Mar 31, 2020 2:06 pm
First I apologize for this long technical explanation and perhaps someone can shed some light and correct me.
I am trying to determine if my ride height measurements are correct so when the day comes to upgrade the shocks/springs I have a reference point. The noted method in the forums is center wheel to fender lip edge.
I am using two metal squares, one 12" long the other 24". I assembled them back to back inverted; looks like "Z" but the vertical leg is straight up/down. This allows me to insure a flat and level measurement. The shorter square is on top pushing against the top inside of the fender. Where the bottom measuring edge of shorter square lines up with the longer square gives me the measurement of longer square which is added to shorter square.
I know this sound a bit convoluted, but is quite simple. Note, the bottom portion of the wheel well is a bit higher than the longer side of the 24" square indicating its 24" plus. This give me some assurance that my measurements are expected.
I measure each corner of the stock GT suspension (4 years old with 16K miles) and get the following heights:
REVISED 4/1/2020
LR - 25.7" - 11.9" = 13.8" ride height
RR - 25.8" - 11.9" = 13.9"
LF - 26.0" - 11.9" = 14.1"
RF - 25.9" - 11.9" = 14.0"
The first figure is the distance from the floor to the fender lip. I repeated this several times for each wheel to improve precision. Subtracting the distance from the floor to the center cap (which is approximately 11.9") give me a ride height as noted above. The 17" wheel has a radius of 8.5" and the flexed sidewall (215 tires) adds around 3.4" in height.
So the point of this exercise, beside figuring out my "ride height" is that the number I see posted for lowered cars has a ride height of over 13" which does not correspond to what I should be getting given ND GT stock springs and shocks. To me, the definition of ride height is not important, but the relative measurement taken with a consistent method is.
Note, I am measuring from the bottom edge of the wheel lip where the edge of the metal ruler is touching the painted metal fender (I taped the square to protect the paint finish). The short edge project around 6 inches into the wheel well and does not touch the tire. The rulers a vertically and horizontally level when the measure is taken.
Any thoughts?
I am trying to determine if my ride height measurements are correct so when the day comes to upgrade the shocks/springs I have a reference point. The noted method in the forums is center wheel to fender lip edge.
I am using two metal squares, one 12" long the other 24". I assembled them back to back inverted; looks like "Z" but the vertical leg is straight up/down. This allows me to insure a flat and level measurement. The shorter square is on top pushing against the top inside of the fender. Where the bottom measuring edge of shorter square lines up with the longer square gives me the measurement of longer square which is added to shorter square.
I know this sound a bit convoluted, but is quite simple. Note, the bottom portion of the wheel well is a bit higher than the longer side of the 24" square indicating its 24" plus. This give me some assurance that my measurements are expected.
I measure each corner of the stock GT suspension (4 years old with 16K miles) and get the following heights:
REVISED 4/1/2020
LR - 25.7" - 11.9" = 13.8" ride height
RR - 25.8" - 11.9" = 13.9"
LF - 26.0" - 11.9" = 14.1"
RF - 25.9" - 11.9" = 14.0"
The first figure is the distance from the floor to the fender lip. I repeated this several times for each wheel to improve precision. Subtracting the distance from the floor to the center cap (which is approximately 11.9") give me a ride height as noted above. The 17" wheel has a radius of 8.5" and the flexed sidewall (215 tires) adds around 3.4" in height.
So the point of this exercise, beside figuring out my "ride height" is that the number I see posted for lowered cars has a ride height of over 13" which does not correspond to what I should be getting given ND GT stock springs and shocks. To me, the definition of ride height is not important, but the relative measurement taken with a consistent method is.
Note, I am measuring from the bottom edge of the wheel lip where the edge of the metal ruler is touching the painted metal fender (I taped the square to protect the paint finish). The short edge project around 6 inches into the wheel well and does not touch the tire. The rulers a vertically and horizontally level when the measure is taken.
Any thoughts?