Anyone running U and P code springs?

[steelsoldiers]

I am looking forward to upgrading my stock X springs to something Super Duty. I have been looking for some V's and B's, but just found a good deal on some U's and P's from a 2003 F250 CC FX4.

From what I have read, the U's have a little less capacity than V's and the P's have more capacity than the B's. I plan on following Cary's recipe for rear spring packs so I can keep my towing capacity and improve my ride.

Is anyone running a set of U's and P's stock or modified? If so, what do you think?

Thanks!!

[caryt]

IMO the V codes are the min. I would use on the front. Do you have any additional info on the P's..

Cary

[steelsoldiers]

Can a U code be modified with a leaf or two from the stock D springs to make them ride more like a V?

The P's are rated at 6830 according to this post: Rear Leaf Springs..

[gabeyd]

I recently put U codes on the front of my 2000 diesel excursion (because I got them for $50 for the pair on craigslit). My old springs had 100k miles, and the U codes were said to have 13k.

They raised the front 1 3/4 inches on the passenger side, and 1 7/8 inches on the driver's side.

I would have preferred to put on V codes, but for the price I couldn't pass it up. If you are getting a great deal on the U codes, go for it, it's well worth the upgrade - nicer drive, especially on speed bumps...

I have not done anything in the back yet...

-Gabe

[caryt]

I haven't tried the P's but based on the weight ratting I would think they would be stiffer and ride harder than B's modded or not. My mod has you replacing the thin spacer-shim and replacing them with the 1/8" ones from the Ex springs. This allows more flexibility and a softer ride. The addition of the 2 short Ex bottom springs to the B codes just gives a height change and IMO doesn't affect the ride quality. If you want to try the P's I would replace the thin shims with the Ex ones. You may or may not need the 2 extra leafs with the P's.

Cary

[steelsoldiers]

What about using one leaf from the stock X D-codes and adding it to the U-codes? Could you cut the spring wraps off of the ends and use it like an add-a-leaf?

The P-codes might be worth trying since a lot of my highway time is with the back of the X loaded with luggage, tools, baby toys, a chocolate lab, etc...

[bpcheramie]

Leave the lab at home and give it shot. If the price is real good what do you have to lose??

Brent

[steelsoldiers]

I decided to hold out for a pair of V's and B's. The price wasn't good enough just to try the U/P combo.

[Bruce1954]

Us will be fine in the front I am not sure of the P code and how it compairs to the B and F I would look into it.

The difference between the V and U up front is about 3/16" of an inch, most Xs sit about 1/4" low on the left due just more heavy stuff on that side, drivers controls and spare tire. the AC stuff on the right is just full of air and a few small motors.

As you can see I have one U code on the right front and a V on the left.
The Left still sits low and that is b4 I get in.

Does anyone know how the P compairs to the F?
Have you looked for the info on the P?
I know the A, B, and F are well documented here if you can find it.
Look under CaryT and my name in your search

I would not discount it just because it has not been tried but then I was the first to use Vs up front as far as I know.

Bruce

[caryt]

Bruce, you were the first to use V codes up front in a X and we are all very happy you did! Others including myself just built apon your work.

Thanks, Cary

[Bruce1954]

OK did a litle more looking and the P code should be a possibility

Links to more info on rears and lots more links: B and F Code Data!

From the above :
The B's are 320/670 and the F's are 334/776 any one have the dual rate numbers for the Ps?

Not sure I ever posted what I did or "over did" to my F codes:

I added the third leaf up form the old G code X rears ala "boertje" "F-code modifications-another way" But I also added the second leaf up and the rear sits a little high and it could be softer.

I have had some very heavy loads on the rear and about all they do istake it a bit below level (I am talking Pintle hitch here with no WD hitch)

I am thinking of removing what was the second leaf up and is now my bottom leaf and see what I get. Also I do not have the overload from the F code installed but I do have the original X Anti-Wrap installed with clearance between the rubber bumper on it and the spring above.

Still think the U-V combo up front works out great and would do it again.

[steelsoldiers]

Thanks for the added input, Bruce. That makes me feel a little better about giving it a try. I will give the guy a call back and see if he still has them. If not, then I'll keep up the search. Anything would be better than stock!

[Snowman269]

U's will be fine, once I did the V's I found it to be higher than needed, & there are a few guys who did go with U's back in 2005.

[aklim]

I'm running U fronts and A rears because they were a freebie. Great price. It did pump up the rear by 1 3/4 and about 1 1/4 in the front. Works better than the stock Excursion springs.

[steelsoldiers]

I found a set of V/A springs today for $75. I think I'm going to give that a shot. I have a set of 285 Nitto Terra Grapplers ready to go on. I still need to get my thicker rear sway bar and shorter bump stops for the front.