Anyone run CPP 4" rear HD drop springs? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Reyals Bemus · 03-07-2013, 06:51 PM

I currently have a pair of ECE 4" drop springs in the rear of my '64 panel. I like where these springs put me stance-wise, but they seem a little too soft for hauling much around. I have a boat and gear I like to take on trips occasionally. With everything loaded up, I'm nearly on the bumpstops.

I found out CPP offers 4" springs in a 'heavy-duty' variant. Anyone use em before? Are they truly more 'HD' than the regular springs?

hemifalcon · 03-07-2013, 07:37 PM

Are yours really the HD ones?? The first ones that I bought from ECE were NOT HD... I sent them back and they send the right ones to me.. (yes--I asked for the HD ones when I made the original purchase..) Both sets look entirely different in the spring thickness and their obvious weight.

RockTonka · 03-07-2013, 08:35 PM

We tried a set of CPPs 4" drop HD rear springs in our burb...pretty much was at the bumpstops when ya put a foot on the bumper

We returned them.

Stock on the left, HD 3/4 ton PU rear springs in the middle (what we're running now), CPP 4" drop HD springs on the right...

hemifalcon · 03-07-2013, 09:10 PM

I don't think those on the right are HD--those are the same ones I originally got before they exchanged em for the middle ones--HUGE difference
Posted via Mobile Device

Reyals Bemus · 03-07-2013, 09:17 PM

Oh wow. Surely those don't both give a 4" drop? The ones in the middle must be stock height 'HD' springs? Hard to know.

**spudder** · 03-08-2013, 08:56 AM

Contact Coil Spring Specialties in St. Marys, Kansas. I have first hand knowledge that they supply several of the vendors with their springs.
I have talked to them about towing with a lowered truck. I was told that my best bet would be a two stage spring.
By dealing with the manufacturer, you can get exactly what you need. They will build a spring that will work for a specific application, and you can buy direct from them.

**Clyde65** · 03-08-2013, 08:57 AM

I have 4" drop springs and I can tow my trailer...slowly, so now I am putting air bags on the rear for the towing adjust ability.

groundbound64 · 03-08-2013, 02:35 PM

I was just about to suggest airbags out back but Clyde65 beat me to it.

03-07-2013, 06:51 PM	#1
Reyals Bemus Registered User Join Date: Dec 2007 Location: Billerica, MA Posts: 329	Anyone run CPP 4" rear HD drop springs? I currently have a pair of ECE 4" drop springs in the rear of my '64 panel. I like where these springs put me stance-wise, but they seem a little too soft for hauling much around. I have a boat and gear I like to take on trips occasionally. With everything loaded up, I'm nearly on the bumpstops. I found out CPP offers 4" springs in a 'heavy-duty' variant. Anyone use em before? Are they truly more 'HD' than the regular springs?

03-07-2013, 07:37 PM	#2
hemifalcon Registered User Join Date: Jan 2012 Location: Antioch, IL Posts: 418	Re: Anyone run CPP 4" rear HD drop springs? Are yours really the HD ones?? The first ones that I bought from ECE were NOT HD... I sent them back and they send the right ones to me.. (yes--I asked for the HD ones when I made the original purchase..) Both sets look entirely different in the spring thickness and their obvious weight. __________________ My '65 Suburban Resto build-- http://smg.photobucket.com/albums/v6...65%20Suburban/ And it's story of being 'saved' http://www.jalopyjournal.com/forum/s...d.php?t=631495

03-07-2013, 08:35 PM	#3
RockTonka Registered User Join Date: Jun 2010 Location: Oklahoma City, OK Posts: 1,524	Re: Anyone run CPP 4" rear HD drop springs? We tried a set of CPPs 4" drop HD rear springs in our burb...pretty much was at the bumpstops when ya put a foot on the bumper We returned them. Stock on the left, HD 3/4 ton PU rear springs in the middle (what we're running now), CPP 4" drop HD springs on the right... Attached Images __________________ 1958 Chevy 1 ton dually 4X4 dump/flat bed My build thread 1966 "Not-So-Original" Chevy Custom Trim Suburban My Time-Killing Project Truck 1966 GMC Extended cab 1 1/4 ton 4X4 My Son's build thread

03-07-2013, 09:10 PM	#4
hemifalcon Registered User Join Date: Jan 2012 Location: Antioch, IL Posts: 418	Re: Anyone run CPP 4" rear HD drop springs? I don't think those on the right are HD--those are the same ones I originally got before they exchanged em for the middle ones--HUGE difference Posted via Mobile Device __________________ My '65 Suburban Resto build-- http://smg.photobucket.com/albums/v6...65%20Suburban/ And it's story of being 'saved' http://www.jalopyjournal.com/forum/s...d.php?t=631495

03-07-2013, 09:17 PM	#5
Reyals Bemus Registered User Join Date: Dec 2007 Location: Billerica, MA Posts: 329	Re: Anyone run CPP 4" rear HD drop springs? Oh wow. Surely those don't both give a 4" drop? The ones in the middle must be stock height 'HD' springs? Hard to know.

03-08-2013, 08:56 AM	#6
spudder Active Member Join Date: Aug 2012 Location: Central Illinois Posts: 103	Re: Anyone run CPP 4" rear HD drop springs? Contact Coil Spring Specialties in St. Marys, Kansas. I have first hand knowledge that they supply several of the vendors with their springs. I have talked to them about towing with a lowered truck. I was told that my best bet would be a two stage spring. By dealing with the manufacturer, you can get exactly what you need. They will build a spring that will work for a specific application, and you can buy direct from them.

03-08-2013, 08:57 AM	#7
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,549	Re: Anyone run CPP 4" rear HD drop springs? I have 4" drop springs and I can tow my trailer...slowly, so now I am putting air bags on the rear for the towing adjust ability. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

03-08-2013, 02:35 PM	#8
groundbound64 Registered User Join Date: Oct 2012 Location: Greely, On, Canada Posts: 89	Re: Anyone run CPP 4" rear HD drop springs? I was just about to suggest airbags out back but Clyde65 beat me to it.



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