Quick body measurement please?

vette427sbc

vette427sbc

Well-known member
Joined
Sep 25, 2008
Messages
1,034
Location
Jersey Shore
Looking for another early C3 to compare to... If anyone has a minute to take a measurement I would really appreciate it!
Assuming the car sits relatively level, measurement from the rear body mount tab on the frame to the ground, a measurement of your body bushing+any shims) And then the rear fender lip to the ground.
Trying to find the relation to ride height and that body mount tab on the frame
:kissass:
 
I have that spec sheet with all of my own #'s written down... It doesnt give any relation to body dimensions though. I dont have the body on my car so Im trying to figure out what height @ the body mount tab will to get me a 27.5" fender lip height. :drink:
 
On the right side of my car, the body mounts were #1 - .620t, #2 - .610t, #3 - .440t and #4 - .420t. The dimension in the rear was 15.125 from the differential axle yoke center to the top of the fender opening (highest point).

I don't have the front measurement but the outer frame rails will tell you that.

Something you might consider is that a 26 inch OD tire is probably going to be 25 inches high with the dimension from ground to center of the wheel at 1 inch less than the center to top of the tire. You should use the static radius as your tire diameter in you analysis and also your prediction of ride height.
 
I"d have to go search/find the GM books, but AS I RECALL they used to measure it from a certain point on the frame on all 4 corners....my garage is off kilt maybe 3/4 inch in back, and 1/4" in front.....with an overall tile toward the door of about 2" not the greatest, but in general the car sat per specs in the book....but measuring steel frame to concrete not fender height, which turns out to be the same as anyone else has measured, for the most part...

Thank YOU previous owners for doing the body work RIGHT.....

:lol::friends:
 
Not sure how much help this is because my rear tires are 315/35/17 with 25.7" advertized diameter... Also my 2" rear flares kinda disturb the picture..... But :

From floor to the frame mount I measure 20 1/8"

My fender lip is at 27" from the floor but again that's flared and not relevant with a stock fender.....

With a stock 255/50/15 tire that is 27" diameter that mounting tab should be at pretty much at 20 3/4" from the floor to give you a stock ride height - if I did the math right.....

Stock 27" diameter compared to my 25.7" is about 1 1/4", devided by 2 is 5/8"...... My measured 20 1/8" + 5/8" is 20 3/4"

My adjustable rear dual mount monospring puts another wrinkle in this ......

Why do you worry? You can add shims if the body sits too low..... Just get it in the ballpark.....

I just measured the height of the frame at 4 1/4" and from the bottom of the frame to the mounting tab is 2 1/2" .... That's eyeballed with a tape ....

I figure the relative dimension from frame to the mounting tab is more accurate that from floor to the mounting tab.....

When I took these measurements the car was sitting level in my garage.
 
BBShark said:
On the right side of my car, the body mounts were #1 - .620t, #2 - .610t, #3 - .440t and #4 - .420t. The dimension in the rear was 15.125 from the differential axle yoke center to the top of the fender opening (highest point).

I don't have the front measurement but the outer frame rails will tell you that.

Something you might consider is that a 26 inch OD tire is probably going to be 25 inches high with the dimension from ground to center of the wheel at 1 inch less than the center to top of the tire. You should use the static radius as your tire diameter in you analysis and also your prediction of ride height.
Click to expand...

Thanks! Did you happen to get the ground to rear body mount and rear fender lip to the ground? Diff yoke center to fender lip I cannot use because I dont have a C3 diff under my car anymore (and my C3 diff wasnt in the stock location anyway). I dont have a way to accurately get static radius with these wheels, so Im comparing the manufacturers advertised OD to my own measurements and its coming out to be pretty damn close. (± .2")

MYBAD79 said:
Not sure how much help this is because my rear tires are 315/35/17 with 25.7" advertized diameter... Also my 2" rear flares kinda disturb the picture..... But :

From floor to the frame mount I measure 20 1/8"

My fender lip is at 27" from the floor but again that's flared and not relevant with a stock fender.....

With a stock 255/50/15 tire that is 27" diameter that mounting tab should be at pretty much at 20 3/4" from the floor to give you a stock ride height - if I did the math right.....

Stock 27" diameter compared to my 25.7" is about 1 1/4", devided by 2 is 5/8"...... My measured 20 1/8" + 5/8" is 20 3/4"

My adjustable rear dual mount monospring puts another wrinkle in this ......

Why do you worry? You can add shims if the body sits too low..... Just get it in the ballpark.....

I just measured the height of the frame at 4 1/4" and from the bottom of the frame to the mounting tab is 2 1/2" .... That's eyeballed with a tape ....

I figure the relative dimension from frame to the mounting tab is more accurate that from floor to the mounting tab.....

When I took these measurements the car was sitting level in my garage.
Click to expand...

Im just trying to confirm my measurements for frame height. Im second guessing myself that I have the frame set too low for my desired ride height as Im designing these new front and rear suspensions. I can add/subtract maybe 1 or 2 shims after assembly due to how tight the cage is to the interior. I think your flares are positioned a bit differently as I should have an 18.75" rear body mount tab height to get me a ~27" fender lip with .5" worth of bushing/shims. Thanks for taking the time to grab the measurements though!
 
You must log in or register to reply here.

Latest posts

Back
Top