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510 suspension


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#1 72_510_Austin

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Posted 21 November 2017 - 06:07 PM

I’ve been wrapping up the body on my restoration project now and I’ve been really confused on a suspension setup for the car. I would like to get the best bang on a decent budget.
Obviously I’d like to go coilovers, adjustable tc rods/lower control arms. But I’ve looked on techno toys and find if I spend 1000 on the fronts and another 700 on rears I feel that’s alittle to much.
Is there anyway you all are getting a similar setup for cheaper? I’ve heard 280zx coils work. But could I be walked through what process to fit them would take?

#2 Jesse C.

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Posted 21 November 2017 - 06:17 PM

Start reading here...

 

http://community.rat...1-280zx-struts/


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#3 Noflers

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Posted 21 December 2017 - 03:28 PM

For the rear, you'd be better off buying the individual components from QA1 and putting them together yourself. Allows for dampening adjustment on a nice rebuildable shock.

I'll see if I can find some part numbers. IIRC, the total price comes out to under $400 for both shocks.

For the front, 280zx struts are you're best bang for the buck option. Stronger spindles and big vented brakes.

#4 Noflers

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Posted 06 January 2018 - 11:35 AM

These are the adjustable dampening ones. The non-adjustable ones are even cheaper. You'd just need tophats and springs. HuVejjB.jpg



#5 datzenmike

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Posted 06 January 2018 - 01:10 PM

I’ve been wrapping up the body on my restoration project now and I’ve been really confused on a suspension setup for the car. I would like to get the best bang on a decent budget.
Obviously I’d like to go coilovers, adjustable tc rods/lower control arms. But I’ve looked on techno toys and find if I spend 1000 on the fronts and another 700 on rears I feel that’s alittle to much.
Is there anyway you all are getting a similar setup for cheaper? I’ve heard 280zx coils work. But could I be walked through what process to fit them would take?

 

The zx coils are larger diameter so even if you can get then up inside the strut tower there won't be any room for camber adjustment. Why not cut the lower spring perches off and put your smaller diameter 510 spring and perch on the zx strut? Secure the underside of the lower spring perch with a set of 2" split collars. Use your smaller 510 top hat and it fits. Ride height is adjustable and you can do this for about $25. With some simple math you can select the spring rate you want by carefully trimming the spring length.

 

Trim around strut lower perch just above weld. Hack saw or angle grinder...

 

bD7FSOK.jpg

 

 

Separate...

 

GpXGvun.jpg

 

 

Grind down weld...

 

50eoVBl.jpg

 

 

Assemble zx strut with 510 top hat, spring and bottom spring perch and tighten one of these below it...

 

Zym2fxc.jpg

 

It's called a split collar and capable of supporting 4,000 pounds or about the weight of 1.8 510s.... each!

 

Push upward on the spring perch and the spring and perch slide up the strut (and why you grind away the old weld) tighten the split collar.

 

facikh7.jpg

 

0VoENXE.jpg

 

Do the other side evenly and lower carefully. Check car ride height and add or subtract from this initial setting till you get the ride where you want it. Unless you plan to adjust your ride height every day or a few times a week (who the hell does this???) or can afford $200-$1,100 for coil overs why tie up the money on them when you get the same thing for $25.

 

 

The 510 spring rate is 89 lb/in and by any account an bit soft. Insane 510 owners increase to 300 lb/in but 200 lb/in or so is the norm. When a coil spring is shortened it actually becomes stiffer, which is nice. With a few easy measurements of the coil wire thickness, the coil diameter and the number of coils, not touching and then multiplying and dividing you can work out a new spring rate before cutting them. Why pay $50 a spring to buy them when you can take advantage of the ones you already have? Keep in mind it's one way. you can increase the rate but you can't put back once cut. I carefully measured my 710 coils and trimmed to get 150 lb/in. and being elderly I find them firm enough for my liking. There is a formula needed for working out your present rate and by trial and error you can work out how much to remove to get what you want. I would say that this is a zero cost modification if you have an angle grinder.

 

One last thing. If your 280zx struts have the original oil bath dampers you can increase their firmness by emptying out the thin watery hydraulic oil and substituting a thicker one. Thicker oil is more resistant to being pushed through the valves. I bought a liter of 20W BellRay motorcycle fork oil for my 710, enough to refill 3 struts... about $17.

 

So in closing, you get adjustable ride height, increased spring rate and firmed up dampers or shocks on the front. The cost was under $50

 

Split collars ................ $25

Motorcycle fork oil...... $17

Cut off disc................. $4 you need a 6" angle grinder but a hacksaw will also work

 

 

 

 

 

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