HQ springs GM# 3955724

[BARRY]

hi i have a old parts book with spring identifiction table HA HB HG YD ARE ALL PART NUMBER 3955725 SPRING WIEGHT 263-344 HB OVER 344 HG ALL THE SAME PART NUMBER

[Camaro Don]

Awesome Greg. I have come across your site. Great info. I did see the HBC (HA) springs. I called them and wanted to confirm the specs. They said its a type "O" and should read "HQ" LOL. Also they couldn't tell me the specs of the spring!! The plot thickens as they say!!! Now what?

[Camaro Don]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BARRY</div><div class="ubbcode-body">hi i have a old parts book with spring identifiction table HA HB HG YD ARE ALL PART NUMBER 3955725 SPRING WIEGHT 263-344 HB OVER 344 HG ALL THE SAME PART NUMBER </div></div>

Thanks Barry. Depending on what spring chart you look at the HA spring is listed as both 3955725 and 3955724. One chart list the 25#, and the other chart lists the 24# as confirmed by the CRG site.

[BARRY]

hi i just bought the springs from heart beat city i will be insalling in about a month from now will let you know HG code for 1969 427

[Camaro Don]

Thanks!! How do they look Barry??

[Donnie]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Camaro Don</div><div class="ubbcode-body">Looks like the rate is 320 lbs/inch Here is an old Chevelle thread.
http://www.chevelles.com/forums/arch.../t-258485.html </div></div>

Thanks Don.

[Nova Research Project]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BARRY</div><div class="ubbcode-body">hi i have a old parts book with spring identifiction table HA HB HG YD ARE ALL PART NUMBER 3955725 SPRING WIEGHT 263-344 HB OVER 344 HG ALL THE SAME PART NUMBER </div></div>

Barry,

Depends on the parts book print date. As they ran out of stock they adjusted the usage to cover more applications. So the newer the book the few part numbers and the more codes per actual part number 'fit'.

Greg

[Nova Research Project]

Camaro Don,

Thanks, Here is some more detail:

I show the specs for the HQ as:

Cut off length = 122.78
Wire Diameter = .628
Total Coils = 9
Rate = 345
Height Uninstalled = 16.45&quot;
Installed Height @ 1830 lbs = 11.09&quot;

All springs were designed to be 11.09&quot; when installed. The &quot;computer selected&quot; spring was just fine tuned to the weight of the car with all the particular options.

There were 9 springs with the 345 rate. The differences are the wire diameter and the coil count needed to put the spring at 11.09&quot; when the car was fully assembled with all options.

The shortest free height for the 345 rate springs was 14.97&quot; and the tallest was 16.95&quot;. This is one of the reasons folks have a hard time with the generic 345 springs and body ride height. All 345 rated springs will do the job. The difference is the ride height you get.

Within reason, you could trim the generic springs to shorten the cut off length and lower the ride height. Alternatively you can install another higher or lower code to get a higher or lower ride height. My spring calculators use the parts book weights to specify the spring required to hit the factory ride height for that weight.

The springs sold by part number came on the scene several years ago to address the ride height problems found with the one size fits all generics. I do not recall who the manufacturer is for them. I doubt the retailers have the specs unless they measure them. They buy them based on part number or application.

Eaton will sell you an equivalent spring to meet the ride height you specify. They would not be able to always match the wire diameter and coil count that came on the car originally. However the spring <span style="font-style: italic">should</span> function fine with the correct ride height.

I hope this helps.
Greg

[Camaro Don]

Greg, that is GREAT info!!! Thanks very much!!! I thought my specs were correct. Eaton spring told me otherwise. At this point I'm not impressed with Eaton. Thanks again.

Greg, is the &quot;HA&quot; springs close in specs as &quot;HQ&quot;?? Just in case HeartBeat city's &quot;HA&quot; (3955724)springs are really &quot;HA&quot; and not &quot;HQ&quot; as they told me. I'm going to order the &quot;HA&quot; springs from them with the number 3955724.

[Nova Research Project]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Camaro Don</div><div class="ubbcode-body"> is the &quot;HA&quot; springs close in specs as &quot;HQ&quot;?? Just in case HeartBeat city's &quot;HA&quot; (3955724)springs are really &quot;HA&quot; and not &quot;HQ&quot; as they told me. I'm going to order the &quot;HA&quot; springs from them with the number 3955724. </div></div>

Camaro Don,

As far as I can tell they were the same spring.

If you are using the original spring tag that lists 3955724 go with that. The Assembly code was just that, a short cut code for the line worker. HA or HQ does not matter. It is the part number that matters. BTW I can create an accurate spring tag (especially if you have a pic of the original).

Provided the spring is true to the specs, you should be happy. Springs do take a while to settle in and might start off high.

Greg