HQ springs GM# 3955724

[Camaro Don]

Trying to find a replacement set of front coils for GM# <span style="font-weight: bold">3955724</span> tag#<span style="font-weight: bold"> HQ</span>

[Camaro Don]

Strange that the Camaro spring code chart does NOT show &quot;HQ&quot; springs?? It seems the load on these springs are 1830lbs and the rate is 345lbs/inch. I'm trying to match this spring as close as possible. The height is perfect for my SS396.

[WILMASBOYL78]

I think a common BB spring was the &quot;HH&quot;...same as a Nova...of course other things impacted spring selection...including trans options, special suapension, a/c. etc...

Anyway...you should be able to get them from Eaton for your exact application.

wilma

[Camaro Don]

Thanks Wilma. Yeah I sent Eaton an email.

[Camaro Don]

Heard back from Eaton. Almost a waste of time. They want to sell me the MC 1266 stock spring on their site. 1725 lbs load and 330 lbs/inch was the rate. This is after I gave them the GM#, the spring specs and everything. Any Big Block guys out there ?? What springs did you use??

[BARRY]

HI look a ricks first generation

[Camaro Don]

Thanks Barry. I have been on every Camaro Vendor site I could think of. Not much help. Heartbeat City offers exact replacements. They don't know the specs of each spring though. Go figure??

[Donnie]

Don, do you have the specs for this spring #3952818 GW?

[Camaro Don]

Looks like the rate is 320 lbs/inch Here is an old Chevelle thread.
http://www.chevelles.com/forums/archive/index.php/t-258485.html

[Nova Research Project]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Camaro Don</div><div class="ubbcode-body">Heard back from Eaton. Almost a waste of time. They want to sell me the MC 1266 stock spring on their site. 1725 lbs load and 330 lbs/inch was the rate. This is after I gave them the GM#, the spring specs and everything. Any Big Block guys out there ?? What springs did you use??</div></div>

HQ I believe was a late spring as it is in the 1970 Nova chart but not the 1969. It should be the same spec as the &quot;HA&quot; code. Heatbeat City has 3955724 HA (http://www.heartbeatcitycamaro.com/store/product/14600/Camaro-Coil-springs-3955724-HA-pair-69/) The spring height and rates went in numerical order. So 3955723 would be a tad bit shorter and 3955725 a tad bit taller.

Click here to see what the weight specs say your spring should be for L34/L35/L78. (http://chevynova.org/69_12437_L34_L35_L78_Springs.htm) Other spring calculators are on my project page.

Greg

[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 &quot;O&quot; and should read &quot;HQ&quot; 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/archive/index.php/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

[Camaro Don]

Thanks Greg!! The original &quot;HQ&quot; tag is in rough shape. I already ordered a new set from HBC. Thanks again.

[Camaro Don]

well, I'm giving up. Moog 6312 it will be. Can't take a chance with the HBC springs if they are wrong.

[69L72RS]

The original springs on my RS COPO were &quot;HQ&quot; springs. It was a late build (09A) car.

[Camaro Don]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 69L72RS</div><div class="ubbcode-body">The original springs on my RS COPO were &quot;HQ&quot; springs. It was a late build (09A) car.
</div></div>
Makes complete sense. &quot;HQ&quot; doesn't appear on the 69 spring charts. I was told its on the 1970 spring charts. CRG does however post some info on the &quot;new HQ springs&quot; for the ZL1. HeartBeat City describes the &quot;HQ&quot; spring decal as for all SS396's with 325 and/or 350 hp. The info is all over the place and NOT clear and concise at all. Just my .02

[Nova Research Project]

Camaro Don;

The reason the information is all over the place is that these were 'computer selected'. Means you can not list just an engine combination. Vendors list a popular applications. They can't list them all.

The only place to see what is the right spring is to use a period parts book and run the math. The calculator does that for you. What code did you come up with there?

I think I said this before. Part number overrides codes. You have the part number from the tag. The spec for 3955724 is what you are looking to have. Installed Height @ 1830 lbs = 11.09&quot;

Aftermarket manufacturers will get you in the ball park. but there are endless stories on the internet about ride height issues. If you are looking for the exact ride height, you are probably better starting with the Heartbeat ones and hope they are not too short(I have never use them). But even then you may need to trim the spring just like the Moog to get the correct ride height.

No matter what spring you buy; you need to shoot for Installed Height of 11.09&quot; @ 1830 lbs.

Good luck,
Greg

[Camaro Don]

Greg the more you read, the less you know. Even CRG states the info is unclear. HBC which I happen to use often, does not list an &quot;HQ&quot; spring with the GM # 3955724. HBC lists GM# 3955724 as an &quot;HA&quot; spring. Its a crap shoot. I went with the Moog 6312. Everything you read states they are rated at 337 lbs. Called Moog direct and they said the 6312 is rated at <span style="font-weight: bold">344</span> lbs. Another example of misinformation. The load for this spring is 1800 lbs. These numbers are pretty close to the &quot;HQ&quot; springs. Funny thing is, after all the reading I've done, a sponser on this site (D&amp;R) has GREAT info on front springs and even lists the &quot;HQ&quot;. They have them for 149.95 Well too late now.