zero rate springs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hgs_notes · 06-25-2007, 07:15 PM

Dumb question, but what are they? Why would you want them?

Thanks,
Mike

msgross · 06-25-2007, 07:31 PM

They let you move your axle forward and backward, also add slight lift without changing ride quality... Here's some info

http://www.offroaddesign.com/catalog/Zero%20Rates.htm

LONGHAIR · 06-25-2007, 07:48 PM

It's a fancy way to say "blocks" w/o really having to say it.

EFI70Blazer · 06-25-2007, 08:14 PM

I just located mine back 1 inch when i put on new offset perches. Figured if i was going to have to cut them off, i might as well improve them while i was doing so.

earl87gta · 06-25-2007, 09:41 PM

There not a block a block id only suported by the u bolts and the little bit of guid pin from the spring pack. ) rates are part of the spring plate when you use them you have to use a new spring pin that goes all the way through it its just like having one of the leafs on the spring pack you have that was cut off on the ends so that it would not efect the stock spring rate so it feels like you still have a stock ride. I used a set in my blazer to get rid of sagy but that they have.

EFI70Blazer · 06-26-2007, 12:39 AM

My perches are actually 1 inch taller than stock, but they are welded to the housing. Basically same idea, just more effort. Springs are 4" Superlift. My 12 bolt was out of a 77 chevy, so i had to move everthing on it. I would have just found another rear end to fit my Blazer, but i already had this one. The old one that was in it had broken the welds loose from the center section making unusable. The previous owner welded it up, but was no where close to where it was supposed to be. It actually sat down in the middle 1" lower than it should have along with one of the tubes rotated more than the other. I also installed 4.10 gears and an Eaton posi while i had my new rear end all apart.

hgs_notes · 06-26-2007, 09:15 AM

Thanks for the info.

msgross · 06-26-2007, 10:08 AM

Quote:

Originally Posted by EFI70Blazer

I just located mine back 1 inch when i put on new offset perches. Figured if i was going to have to cut them off, i might as well improve them while i was doing so.

hope you plan on changing those bearings too...

LONGHAIR · 06-26-2007, 08:26 PM

The relevance of the center pin is minimal...it is still just a block, with all if the leverage disadvantages of a block. The fact that it is only an inch thick makes that not a huge factor, but it is still there. On the back, it would be ok, but I wouldn't combine it with another block. I wouldn't use it on the front at all.

EFI70Blazer · 06-26-2007, 08:35 PM

Yep, all the bearings were replaced, actually only the housing did not get replaced with a new one. It was sandblasted after it was all done. Here is a completed pic.

msgross · 06-26-2007, 10:29 PM

purdy

LONGHAIR · 06-27-2007, 07:25 PM

It makes the gas tank scream .........ME NEXT!

06-25-2007, 07:15 PM	#1
hgs_notes GEARHEAD Join Date: Aug 2003 Location: MN Posts: 6,116	zero rate springs Dumb question, but what are they? Why would you want them? Thanks, Mike __________________ If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff

06-25-2007, 07:31 PM	#2
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: zero rate springs They let you move your axle forward and backward, also add slight lift without changing ride quality... Here's some info http://www.offroaddesign.com/catalog/Zero%20Rates.htm __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

06-25-2007, 07:48 PM	#3
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: zero rate springs It's a fancy way to say "blocks" w/o really having to say it.

06-25-2007, 08:14 PM	#4
EFI70Blazer Active Member Join Date: Apr 2006 Location: Pendleton, OR Posts: 243	Re: zero rate springs I just located mine back 1 inch when i put on new offset perches. Figured if i was going to have to cut them off, i might as well improve them while i was doing so. __________________ Mike T. Oregon 70 GMC Jimmy 4x4 70 Camaro LS1 plans in the works 71 RS/SS Camaro numbers matching 86 Chevy Silverado SWB 4x4 (454 merlin heads, 3/4 running gear upgrade, Detroit lockers front and rear)

06-25-2007, 09:41 PM	#5
earl87gta Senior Member Join Date: Dec 2003 Location: Kingsport TN Posts: 4,641	Re: zero rate springs There not a block a block id only suported by the u bolts and the little bit of guid pin from the spring pack. ) rates are part of the spring plate when you use them you have to use a new spring pin that goes all the way through it its just like having one of the leafs on the spring pack you have that was cut off on the ends so that it would not efect the stock spring rate so it feels like you still have a stock ride. I used a set in my blazer to get rid of sagy but that they have. __________________ Earl 68 2500 4x4 GMC Burb

06-26-2007, 12:39 AM	#6
EFI70Blazer Active Member Join Date: Apr 2006 Location: Pendleton, OR Posts: 243	Re: zero rate springs My perches are actually 1 inch taller than stock, but they are welded to the housing. Basically same idea, just more effort. Springs are 4" Superlift. My 12 bolt was out of a 77 chevy, so i had to move everthing on it. I would have just found another rear end to fit my Blazer, but i already had this one. The old one that was in it had broken the welds loose from the center section making unusable. The previous owner welded it up, but was no where close to where it was supposed to be. It actually sat down in the middle 1" lower than it should have along with one of the tubes rotated more than the other. I also installed 4.10 gears and an Eaton posi while i had my new rear end all apart. __________________ Mike T. Oregon 70 GMC Jimmy 4x4 70 Camaro LS1 plans in the works 71 RS/SS Camaro numbers matching 86 Chevy Silverado SWB 4x4 (454 merlin heads, 3/4 running gear upgrade, Detroit lockers front and rear)

06-26-2007, 09:15 AM	#7
hgs_notes GEARHEAD Join Date: Aug 2003 Location: MN Posts: 6,116	Re: zero rate springs Thanks for the info. __________________ If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff

06-26-2007, 08:26 PM	#9
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: zero rate springs The relevance of the center pin is minimal...it is still just a block, with all if the leverage disadvantages of a block. The fact that it is only an inch thick makes that not a huge factor, but it is still there. On the back, it would be ok, but I wouldn't combine it with another block. I wouldn't use it on the front at all.

06-26-2007, 08:35 PM	#10
EFI70Blazer Active Member Join Date: Apr 2006 Location: Pendleton, OR Posts: 243	Re: zero rate springs Yep, all the bearings were replaced, actually only the housing did not get replaced with a new one. It was sandblasted after it was all done. Here is a completed pic. __________________ Mike T. Oregon 70 GMC Jimmy 4x4 70 Camaro LS1 plans in the works 71 RS/SS Camaro numbers matching 86 Chevy Silverado SWB 4x4 (454 merlin heads, 3/4 running gear upgrade, Detroit lockers front and rear)

06-26-2007, 10:29 PM	#11
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: zero rate springs purdy __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

06-27-2007, 07:25 PM	#12
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: zero rate springs It makes the gas tank scream .........ME NEXT!



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