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Guest Message by DevFuse

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EA81T front springs ... vs EA82T RX front springs?

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10 replies to this topic

#1 baccaruda



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Posted 08 February 2007 - 02:37 AM

Searched, failed.

The infamous Subaru Suspension Chart does not cover the EA81 at all.
Does anyone have specs for the EA81T-style front springs?

And I know that the front of the EA81T sits lower in front.. is this a function of the strut height or spring height or both?

#2 mikeshoup



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Posted 08 February 2007 - 08:20 AM

The following are the specs for a TURBO. Non TURBO are different.

Stabilizer Bar: 22mm
Coil Diameter: 130mm
Spring Coefficient: 25.5 N/m
Outer Cylinder Length: 376mm
Piston Rod Diameter: 20mm
Damping force:
- Expansion: 785 N
- Compression: 490 N

The rear is completely different, so comparing it is moot.

As for the height, the Turbo and non-Turbo share the same struts. The springs are different, but if anything the Turbo spring makes the car sit higher. It has more coils and is stiffer. I personally do not notice a difference between the two in ride height in the front though.

#3 baccaruda



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Posted 08 February 2007 - 12:51 PM

:banana: Thanks, was that in the FSM (of which I have one:rolleyes:)?
My coupe squats in the front but the back is high, it may have had its torsion bars adjusted.. and if the springs *are* shorter, that's what spacers are for.

#4 carfreak85


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Posted 08 February 2007 - 01:03 PM

The turbo springs may have more coils and thicker material, but its overall height is shorter than a 4WD spring. From the 84 FSM: Free length for Non-Turbo is 319mm (12.56 in) while the free length for the Turbo springs is 310.5mm (12.22 in). As you can see, they are shorter.

As for the RX springs, they will lift the front of your car an inch or two because their free length is 13-14 inches.

#5 naru


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Posted 08 February 2007 - 01:08 PM

FSM says an 84 turbo wagon sits .4 inches lower than an 84 4wd GL wagon.

#6 baccaruda



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Posted 08 February 2007 - 03:08 PM

Ok, so from the chart:

4WD RX Sedan (EA82T)
Front Spring Coil Spring Coefficient = 27.5 N/mm

and from the FSM :rolleyes:
1984 EA81T
Front Spring Coefficient: 25.5 N/m

So the EA82 RX springs are a little more aggressive than the EA81T's. Not so much that I'd seek them out.

The EA81T front struts/springs sit a little lower but not enough to account for my coupe's stance, which means it's more likely that the back was clocked up a little. Not that I mind, but if I were to equalize the height and then decided to push the front up a little more, I'd probably go with 4WD front struts and perhaps add spacers under the springs.

Thanks for helping me hash this out, guys. This weekend I'll have to take some shots of my coupe so i can finally show it off! Then you can see what I'm talking about too.

#7 Ross


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Posted 08 February 2007 - 04:12 PM

Just for interests sake..... Mine has shorter bilstein struts and springs in the front (lower & stiffer than standard ea81t), and bilstein shocks in the rear. Rebuildable apparently.

No idea if that was a factory option, or if it were an aftermarket thing....

#8 carfreak85


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Posted 08 February 2007 - 04:52 PM

Ross, I don't think we got anything like that in the States. If you can find another set of those I'd like them. I still have that oil cooler for you.



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Posted 08 February 2007 - 10:30 PM

I really don't think i've ever heard of aftermarket performance stuff for any ea81 car. Would be really interesting to find though.

What is the spring specs on the standard ea81 2wd and 4wd front springs?

#10 82 Suby

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Posted 08 May 2007 - 04:23 PM

So would the rx springs fit my 82 2wd coupe? I'd like to level mine out and it sounds like that would do the trick.

#11 redskin


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Posted 09 May 2007 - 01:08 PM

In Australia, King Springs put out a range of front springs for any application to suit EA-81. l am running a set with KYB front struts on my turbo, cost of a pair approx. $150.Aus.

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