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View Full Version : Ride height and "rake"


OX1
03-27-2017, 02:23 PM
Read through this thread.

http://www.squarebirds.org/vbulletin/showthread.php?t=3087&highlight=ride+height&page=2

I have 7 leaf rear susp and 8.5 from center of wheel to bottom of wheelwell (with skirt removed). That sounds right.

Front was 15.75 from center of wheel to top of wheel well.
This sounds high with most in that thread getting 14-14.5

Now I also measured "rake" using the ground (my 4 post lift, so no variation in this "ground") to the bottom of door sill (front and rear).

Front was 8.5, rear was 10.

So my question is, if I am theoretically too high in the front, wouldn't that make a pretty sever rake if I lowered the front another inch or so?

simplyconnected
03-27-2017, 07:20 PM
Henry, it all depends on what YOU want. Most Squarebird aftermarket rear springs have 5 leafs. Some vendors sell sets with 6 leafs. I have never heard of seven. Pardon me for saying but, the ride must be stiff as a truck.

We have plenty of pictures showing 'stance' of the Thunderbirds as they left the factory. We also have measurements. How you prefer your car to be, is personal choice.

BTW, I know measurements are commonly done from the center of the wheel to the bottom lip. With new tire and wheel profiles, it's my belief that measuring from the GROUND to the lip is a more accurate method. - Dave

OX1
03-28-2017, 07:46 AM
I was fine with it the way it was, apparently raked higher
by at least an inch or two in the rear, but I am certainly
not going to put those hokey spring helpers back in
the front, so I need a spring at least as tall as the
one I had with the helpers.

Was there ever a diagram like this for SB's?

http://www.supermotors.net/getfile/846565/original/eblinedimensions.jpg

Anyway, I only counted my leaves after I read this thread
below. My springs look original after seeing corrosion on
leaves and bushing condition. But from what you are telling
me, I cannot get the same spring I have now. So if I
replace (if/ever), odds are the rear will be lower.

"Rear: 59-60

It looks like 7" to 7.5" from the Center of Hub Cap to top of
skirt should be close to the original rear measurement
with 6 leaf springs (standard equipment).

Optional factory heavy duty rear suspension with 7 leaf
springs should be about 8" to 8.5"

Post # 38

http://squarebirds.org/vbulletin/showthread.php?t=3087&page=2

BTW, do you guys normally count the very short leaf
(maybe foot long max) @ bottom of pack?

Henry, it all depends on what YOU want. Most Squarebird aftermarket rear springs have 5 leafs. Some vendors sell sets with 6 leafs. I have never heard of seven. Pardon me for saying but, the ride must be stiff as a truck.

We have plenty of pictures showing 'stance' of the Thunderbirds as they left the factory. We also have measurements. How you prefer your car to be, is personal choice.

BTW, I know measurements are commonly done from the center of the wheel to the bottom lip. With new tire and wheel profiles, it's my belief that measuring from the GROUND to the lip is a more accurate method. - Dave

sidewalkman
03-28-2017, 06:04 PM
I was fine with it the way it was, apparently raked higher
by at least an inch or two in the rear, but I am certainly
not going to put those hokey spring helpers back in
the front, so I need a spring at least as tall as the
one I had with the helpers.

Was there ever a diagram like this for SB's?

http://www.supermotors.net/getfile/846565/original/eblinedimensions.jpg

Anyway, I only counted my leaves after I read this thread
below. My springs look original after seeing corrosion on
leaves and bushing condition. But from what you are telling
me, I cannot get the same spring I have now. So if I
replace (if/ever), odds are the rear will be lower.

"Rear: 59-60

It looks like 7" to 7.5" from the Center of Hub Cap to top of
skirt should be close to the original rear measurement
with 6 leaf springs (standard equipment).

Optional factory heavy duty rear suspension with 7 leaf
springs should be about 8" to 8.5"

Post # 38

http://squarebirds.org/vbulletin/showthread.php?t=3087&page=2

BTW, do you guys normally count the very short leaf
(maybe foot long max) @ bottom of pack?

You don't want 7 leaves, trust me, it'll ride like a pickup truck unloaded.

simplyconnected
03-28-2017, 07:04 PM
Yep, count them all...

My next door neighbor had an 'extra' spring added to his Granada. But know what?? He WAS a trucker and that's the 'feel' he wanted in his retirement years. It's your car to do with as you like. - Dave

OX1
03-29-2017, 07:40 AM
You don't want 7 leaves, trust me, it'll ride like a pickup truck unloaded.

Rides Great. I know what a bad ride is, I have 2 classic broncos :D (92 inch wheelbase, solid axles, 33" tires, about the same weight as a bird)

Yep, count them all...

My next door neighbor had an 'extra' spring added to his Granada. But know what?? He WAS a trucker and that's the 'feel' he wanted in his retirement years. It's your car to do with as you like. - Dave

So was the 7 leaf spring a factory option or not? Just curious.

dgs
04-22-2017, 05:45 PM
BTW, I know measurements are commonly done from the center of the wheel to the bottom lip. With new tire and wheel profiles, it's my belief that measuring from the GROUND to the lip is a more accurate method. - Dave

I realize that I'm late to the party, but I'd like to offer a different take on this. With differences in wheel and tire sizes, I believe that measuring from the wheel center to the body will be more consistent. You are then measuring the suspension and taking the tires out of the picture.

Different tire diameters will raise and lower the car and change the distance from the ground to the body. The distance from the wheel center to the body should be pretty independant of tire diameter and should be comparable from car to car regardless of tire size.