<VV> Re: SPRING SPECS (where do i look?) LONG

[Shaun McGarvey]

I have a photocopy of the 1964 specs that came with my documentation package 
from GM Canada.
Here's the info:
FRONT SPRINGS
3848975 (All cars ex. cvt.)
Right hand helix, Steel alloy, heat treated and drawn
cut-off length= 90.351"
number of coils (active, total)  5.85, 7.184
wire diameter= 0.470"
outside diameter=  4.393"
pitch diameter= 3.923"
Height (free)= 10.651"
Height (working)=  6.42" at 770 lbs.
Deflection rate between 8.95" & 11.95"= 182 lbs.(at spring)    106.5 lbs.(at 
wheel)

CONVERTIBLE FRONT SPRINGS
3826077  same as 3848975 except as follows:
cut-off length= 92.18"
number of coils (active, total) =  5.58, 7.85
Height (free)= 11.12"
Height (working)= 6.42" at 855lbs.


REAR SPRINGS
LEFT side (All exc. cvt.) 3848969
cut-off length= 111.687"
number of coils (active, total) =7.50, 8.834
wire diameter= .506"
outside diameter= 4.465"
pitch diameter= 3.959"
Height (free)= 13.369"
Height (working)= 7.45" at 1095lbs.
deflection rate between 5.95" & 8.95"= 185 lb./in. (at spring)   142.5 
lb./in. (at wheel)
RIGHT side (all exc. cvt.)  3848967
same as 3848969 except as follows:
cut-off length= 98.804"
number of coils (active, total)= 6.50, 7.834
wire diameter= .486"
outside diameter= 4.425"
pitch diameter= 3.939"
Height (free)= 12.585"
Height (working)= 7.45" at 950 lbs.

CONVERTIBLE
LEFT side 3848970
same as 3848969 except as follows:
Height (free)= 12.585"
Height (working)= 7.45" at 1170 lbs.

RIGHT side 3848968
same as 3848969 except as follows:
cut-off length= 98.804"
number of coils (active, total)= 6.50, 7.834
wire diameter= .486"
outside diameter= 4.425"
pitch diameter= 3.939"
Height (free)= 13.018"
Height (working)= 7.45" at 1030 lbs.

I hope this helps.
yea, Vairily ... Shaun





> Hi Tim,
> Maybe I can help. The spring specs seem to be listed in only one document
> (each year) that I am aware of. And even these specs have some 
> confusion/errors,
> but are the best we have.
>
> The Document is Called Chevrolet "Engineering Specifications" and is
> exceedingly rare.
>
> Unfortunately, My copies are not at my current location and it will be a
> month or so before I will be able to access these documents. I will 
> however be
> able to scan and email you the data after that time if you so indicate.
>
> PS, on the 1964s, the rear springs were different from each other.
>
> Regards,
> Bob Helt