Dobinsons on, BP springs off

[Fifty]

We installed a RTT on our Yukon xl Denali that was running the border patrol spec rear springs. Rated at 225# rate iirc.

The dobinsons c09-045 are 245# I think… and just a hair longer. Like maybe 1/3 inch.

It lifted the rear 2/3” and tightened the rear up greatly. No more packing on the rear end.

Super happy considering the weight increase.

If I was not adding 200# on the roof (ikamper deluxe) I’d have stuck with the BP springs.

I’m going to swap the coilover springs too for a little stiffer and see how that feels. Preload increase is an option but I have a bunch of springs laying around.

 

[BigBoyZ71]

Lets see a pic!

 

[Fifty]

Old springs

 

[Fifty]

Old springs… I’ll get the photo with the new ones tomorrow. I also need to swap the springs on the coilovers and lift the front a little to get close to a level

 

[Marky Dissod]

We installed a RTT on our Yukon xl Denali that was running the border patrol spec rear springs. Rated at 225# rate iirc.
The dobinsons c09-045 are 245# I think… and just a hair longer. Like maybe 1/3 inch.
It lifted the rear 2/3” and tightened the rear up greatly. No more packing on the rear end.
Super happy considering the weight increase.
If I was not adding 200# on the roof (ikamper deluxe) I’d have stuck with the BP springs.
I’m going to swap the coilover springs too for a little stiffer and see how that feels. Preload increase is an option but I have a bunch of springs laying around.

Mind if I ask for websites so I can learn more about these?

 

[Fifty]

Which part are you interested in? The dobinsons?

 

[Marky Dissod]

Which part are you interested in? The dobinsons?

As much info as you're willing to share.
Although the vehicle platform is too old for most people to care about, I knew / know enough about the GM B- & D- frame front & rear spring packages to help anyone make a Fleetwood that can catch up to an Impala SS on badly maintained roads - and there are a handful of people who eclipse my knowledge on the subject.

When it comes to the GMT82x & 83x / short & long wheelbase suvs, I know almost nothing, and nothing quantitative at all.
So when you wrote

... border patrol spec rear springs. Rated at 225# rate iirc.

my 'go learn something' alarm went off, because I want to learn about front and rear spring rates,
so that when I get the stiffer torsion bars I want (RPO YT if possible?), I can select appropriate rear coils commensurate to the front spring rate increase.

So, um, any help you can provide would be appreciated, because I've found almost none to date.

 

[eurodre]

I followed your other thread in like 2022-2023 when you first got the BP springs. How does one even source those anymore?

 

[Marky Dissod]

I followed your other thread in like 2022-2023 when you first got the BP springs. How does one even source those anymore?

How does one source the border patrol springs? Or the Dobsons, for that matter?

 

[eurodre]

How does one source the border patrol springs? Or the Dobsons, for that matter?

I found this based off of the original post:

DOBINSONS COIL SPRING PAIR (C09-045) - Dobinsons Spring & Suspension USA

Suits: (REAR) Tahoe 1500, Avalanche, Suburban 1500 ½ ton 2007 on Yukon 1500 ½ ton (inc. XL + Denali) Cadillac Escalade ESV/EXT 2" Lift (Stock Load) Fully Designed, Manufactured, and Finished In Australia Ultra modern design technology, Fully Scragged & Load Tested State of the Art Heat...

dobinsonusa.com

 

[Fifty]

Sorry, yea that’s the link.
The BP springs, I still have in my garage. Idk what it would cost to ship them, but I’d sell for $80 plus shipping.