CPP rear springs

[steelhorse]

I remember a while back people were saying the cpp rear springs were too soft and were bottoming out.Do they still have this problem?I am about to order the lowering kit for my truck and only want to do this once.I am plaining on going with 2.5 drop spindles,1 inch front springs and either 4 or 5 inch rear springs.I dont want to c notch my frame,will I be ok a with 5 inch drop in the rear?

[gcburdic]

Might want to get the adjustable track bar and shock relocators....

[Fitz]

If you drop the rear that far the track bar will bind and you will have a bear of a time with shocks. There are several places where you can get an adjustable track bar, track bar relocator and shock mount relocation kit that will allow your rear suspension to work correctly with the shorter springs. CPP has the right pieces as does Early Classic Enterprises.

[steelhorse]

I was planning on getting the shock relocator and adj. track bar.I was just wondering about the spring quality/stiffness.I want to make sure I dont bottom out over bumps.

[ShredSled]

I'm in the same boat. But I'm also looking at doing their bolt-in c-notch.

But I see they have the springs in regular drop version, but also drop HD... I was assuming those would be too rough though, since I'd rarely be hauling a load and never towing with this truck...

[Tx Firefighter]

I have run quite a few sets of Early Classic 6 inch springs on my different trucks over the years. They are sufficiently stiff to still haul. I hauled Honda Goldwings in the bed of my 72 stepside several times with no undue bottoming out. They did bottom occasionally with the bike in the bed, but not enough to be annoying or justify c-notching the truck. Unloaded, no bottoming issues at all.

I can't speak of CPP springs with any first hand experience.

[Beatcoaster]

just get the heavy duty 4" springs they sell and some 1" drop blocks...

[Dynomutt]

I bought the 4" drop standard duty CPP springs and they are WAY too soft in my opinion. I just replaced them with the 4" drop heavy duty CPP springs and I am MUCH happier with these.

[Dynomutt]

Here are a couple of pics to give you a little visual difference in the springs.

[ShredSled]

Originally Posted by Dynomutt

I bought the 4" drop standard duty CPP springs and they are WAY too soft in my opinion. I just replaced them with the 4" drop heavy duty CPP springs and I am MUCH happier with these.

hmmm....

Just curious, did you put them on a long bed, or short bed? Gas tank relocated to the back frame?

And how did you decide they were too soft? I know this can be kind of a personal opinion, but did you have excessive bottoming or something?

[Dynomutt]

Long bed and the tank was not relocated yet.

You're right, this is very much a personal preference thing that's why I said they were too soft in my opinion.

I weight just shy of 180 and I could stand in the back of my truck and the rear end was on the bump stops, and yes that is with the proper shocks, etc. When I would hit a bump at about 30, the rear would hit the bump stops. I'm just not a fan of that soft of a spring.

[Jeffs70]

Originally Posted by Dynomutt

Here are a couple of pics to give you a little visual difference in the springs.

Those top springs look just like Jeep Wrangler Rear Coils to me.

also this gave me some great info as I am about to do this with my truck in the rear. as I just did a full frame swap from leafs to coils.

[steelhorse]

Thanks,I didnt know they offered Heavy duty springs.

[Beatcoaster]

only in 2" and 4" drops though...so if you want lower you need to add some blocks

[BluTrukker]

How low can you go before you need a new track bar and relocate the shocks?

[Beatcoaster]

I'm going with the 4" HD's and hoping I don't have to do either, but we shall see...

[Bruce88]

My 72 short bed is currently tore down for rebuild, but when it was together and a 4 inch drop springs in the rear suspension I took some measurements of shock and suspension travel. I just posted a shock relocation picture I generated that you might want to take a look at to help determine how much you would like to drop your aft suspension (post # 257) http://67-72chevytrucks.com/vboard/s...318544&page=11

From my understanding I have soft springs and plan on using air shocks to compensate for carrying loads. From my calculations any drop more than 4 inch springs will almost be sitting on the rubber frame stops. And the use of drop blocks to get additional drop you might have to be concerned with scraping the shock relocater with a flat tire. So with any thing more than 4 inch drop other considerations will need to be considered.

I haven’t taken any measurement to see if there’s any interference with the bed floor or any other components but you might be able to gain an additional ½ inch suspension travel by taking a ½ inch off the frame rubber stop (just a thought).

[ShredSled]

Originally Posted by Dynomutt

Long bed and the tank was not relocated yet.

You're right, this is very much a personal preference thing that's why I said they were too soft in my opinion.

I weight just shy of 180 and I could stand in the back of my truck and the rear end was on the bump stops, and yes that is with the proper shocks, etc. When I would hit a bump at about 30, the rear would hit the bump stops. I'm just not a fan of that soft of a spring.

ah gotcha! Just trying to see how close my opinion might align with others on here, you know.
The long bed might have just a bit to do with it, but still, bottoming out on the bump stops when you're simply standing in the bed, hmmm... that's not good.
I still don't know which route I'm gonna go, but I do want more drop than 4" and don't want to lower the trailing arms too much with too much block, but this would also be going into a step-side bed so the load would be lighter and less leverage.