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R50 rear springs


neilca
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I lifted the front of my truck using 2" spacers on top of the strut. The rear I used 2.5" spacer. The stance looks good.

 

I went to the gun club yesterday with two friends. The truck was loaded down with guns, ammo and other accessories. When we went over big bumps it felt like the rear springs where bottoming out. CLUNK!. At the end of the day and the truck was unloaded of friends and hardware the problem was decreased.

 

I also want to use the truck for towing my race car and loading it with tools, jacks and spare parts. So I think I need heavier rear springs and I would like to have less spacer and more travel. The only springs I have found are OME heavies with a 1.75 lift. Are there any other choices?

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Air bags are a great option for towing and hauling. But, you will lose some flex and articulation off road so you need to decide what matters the most to you. For me, the towing and hauling heavy loads is more important so I’m very happy with the airlift helper bags. I’ve had over 1000 lbs of landscape stone and mulch in the back with no sag with this set up. Install is pretty easy as well.

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I routed mine to a single inflation valve tucked under the rear bumper so it’s easy to change air pressure as needed to adjust for load weight.

 

 

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Is the correct PN for the OME rear springs 2922? Are these the heaviest springs?

I have the AC 2 inch lift springs. I bought them about 10 years ago. I think they were higher spring rate than OME, but I don't remember how I figured that out. There is a thread I started on here when I installed them.

 

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I have the AC 2 inch lift springs. I bought them about 10 years ago. I think they were higher spring rate than OME, but I don't remember how I figured that out. There is a thread I started on here when I installed them.

 

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Where can you buy the AC springs?

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Where can you buy the AC springs?

I'm pretty sure this is where and what I bought, but the site has changed. And there was nothing about needing aftermarket wheels with 3.75 backspace. I have factory 2001 alloy wheels working fine. I think I run 265/75R15. Maybe they mean only if you do run 31s. I'd call them and ask.

 

https://www.4x4parts.com/i-18981315-pathfinder-suspension-lift.html

 

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Where can you buy the AC springs?

Also just FYI, I installed them myself, but the one piece I couldn't do, and I don't think most backyard mechanics could do unless they have a shop screw press, is assemble the strut package. I bent my McPherson strut compressor trying to compress those dam springs to assemble the strut.

 

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Also just FYI, I installed them myself, but the one piece I couldn't do, and I don't think most backyard mechanics could do unless they have a shop screw press, is assemble the strut package. I bent my McPherson strut compressor trying to compress those dam springs to assemble the strut.

 

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I am looking for rear springs.

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I am looking for rear springs.

Oh yeah I forgot. Well I did use the strut compressor to squeeze the rear springs enough to work them in without having to detatch the brake lines.

 

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I was talking to some racing buddies last night and they thought a 5 inch spring was common with circle track racers. So I did a search and found these springs. You can get them in just about any rate you want. I was thinking of going with the 150 lbs rate. Stock I have read are 120 lbs.

 

https://www.speedwaymotors.com/Eibach-15-Inch-Rear-Racing-Springs,270.html?sku=330150-150

 

What do you guys think?

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Something to be mindful about when buying stuff from AC/4x4parts.com is that you don't know what you're getting. They unbrand everything as sell as if it were their own. The medium duty $160 rear springs they sell are OME MD (p/n 2922) springs.

 

Also keep in mind that load carrying is a function of springs, and load dampening is a function of shocks. If the shocks can't dampen the load, or if the load compresses the springs enough, then the bumpstops also get factored in. My guess is that when you were loaded, the shocks allowed enough jounce to allow the axle to bump the bumpstops...which can also make the bumps feel harsher. Though, with spacers installed, you probably have even more clearance between bumpstop and axle, unless you extended the bumpstops. How are your shocks?

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I was talking to some racing buddies last night and they thought a 5 inch spring was common with circle track racers. So I did a search and found these springs. You can get them in just about any rate you want. I was thinking of going with the 150 lbs rate. Stock I have read are 120 lbs.

 

https://www.speedwaymotors.com/Eibach-15-Inch-Rear-Racing-Springs,270.html?sku=330150-150

 

What do you guys think?

 

That would be sweet if these could work! From reading the thread that mjotrainbrain mentioned it looks like the free height for the OME MD is 360 mm (14.173 in) and the spring rate is 140. So the Eibachs with a 15 in free height and 150 (or higher) rate should give a noticeable bump in lift over the OME's.

 

Couple of things though: earlier in that thread someone measured the ID of the stock springs at 5", whereas the Eibachs are 5" OD. That could be a deal breaker. Another thing is the Eibachs don't specify the number of coils for their springs. TBH I don't know if that matters since the rate is specified, maybe someone else could clarify that.

Edited by jjonez
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The ID/OD of the springs is in question because the way they are listed on Speedways web site. It is my experience that racing springs are based on the ID because they are usually going over a shock, coil overs.

 

My shocks are KYB's and are in good shape. The rear springs are just wimpy

 

We shall see, I ordered a set of 175 lb springs since my calculations shows it should give me a 2" lift on the rear. I also bought some new bump stops since mine are toast.

 

More to come......

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I received the springs and they will not work. 4" ID, 5" OD. So that is the racing standard.

 

I spoke with some buddies of mine who are into Land Rovers. They tell me the Defender springs are 5" ID and they come in many flavors. I am looking at PN NRC9446 and NRC9447 springs. Basically, one is 1/2 inch longer for the driver side but nominally 15" long and 175 spring rate. Collecting more information on these but it is looking good.

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You've inspired me to become a guinea pig! After much research I placed an order for two drivers side standard duty rear springs for a Defender 90, part number NRC9448. Land Rover likes to vary their spring height by .5 inch from left to right, but since the original Nissan springs aren't like that I decided to order two matching springs to be the same height. The specs on the springs are a free height of 15.3 inches, with a spring rate of 225/inch. If my math is right, that should give me about a half inch more lift then what I have now with the stock springs and 2.5 inch spacers. I'm hoping that little bit of additional rake will be enough to keep me about level when towing and with gear/people in back. My air bags work great, but I've still never liked how soft the stock springs are, and I'd rather have springs that can take more weight without relying so much on the air bags. With shipping from the UK, the total was $80 for the pair...if this works out that's a great deal for what equates to a nice heavy duty spring for the rear. I'll keep you all posted when they arrive.

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WOW $80 with shipping from the UK is a deal. Who is the vendor? I bought mine from Rovers North here in the US $103 for the pair shipped. I went with NRC 9447 springs which are the same but 175 lbs/in. I am expecting 2" lift over stock with these. One spring was delayed, but now both are in the mail. Probably get them this week.

 

If anyone else wants to play you can see the selection here:

 

http://www.red90.ca/rovers/springinfo.html

 

 

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