Adjustable Rear Spring Perch

Suspension, including wheel, tire and brake.
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jeffball610
Posts: 213
Joined: 15 Sep 2006 14:12
Location: Las Vegas, NV

Adjustable Rear Spring Perch

Postby jeffball610 » 30 May 2017 17:01

I'm having trouble finding any info on spring perches for the stock rear 510 location. I know someone has done it, but I can't even find good info on spring size. From what I can gather, the stock rear springs are about 4.25" OD and about 3" ID. The suspension kit I ordered 10 years ago from Top End Performance is no longer available, but works pretty well so far. I need to adjust the rear just a bit due to my Z31 spindle swap I did.

I've searched for perches, but info seems thin from what I've done so far. There are some kits for 5" springs and lots for the common 2.5" springs most of us run on the front struts. Does anyone have a decent source in the states? I'm trying to get this resolved before this weekend 6/3/17 so I can make the most of my first autocross event in the car.
1972 Datsun 510
7-bolt 4G63T, EVO 9 pistons & rods, Garrett GT3076R, "Flipped" Stock Intake Manifold, Toyota R154, Z31 R200 w/ CVs

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jeffball610
Posts: 213
Joined: 15 Sep 2006 14:12
Location: Las Vegas, NV

Re: Adjustable Rear Spring Perch

Postby jeffball610 » 30 May 2017 17:17

This is what I'm currently looking at, but it states it's for 5" or 5.25" springs. It also says it has a 2.75" ID which would probably be too tight for a 3" ID spring.

http://www.speedwaymotors.com/AFCO-Adju ... 49203.html
1972 Datsun 510
7-bolt 4G63T, EVO 9 pistons & rods, Garrett GT3076R, "Flipped" Stock Intake Manifold, Toyota R154, Z31 R200 w/ CVs

Three B's Racing
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Joined: 03 Mar 2009 11:58
Location: New Hampshire

Re: Adjustable Rear Spring Perch

Postby Three B's Racing » 31 May 2017 04:59

jeffball610 wrote:I'm having trouble finding any info on spring perches for the stock rear 510 location. I know someone has done it, but I can't even find good info on spring size. From what I can gather, the stock rear springs are about 4.25" OD and about 3" ID. The suspension kit I ordered 10 years ago from Top End Performance is no longer available, but works pretty well so far. I need to adjust the rear just a bit due to my Z31 spindle swap I did.


Drop the rear crossmember enough so the rear springs are loose at top then install a thick rubber spacer to fit your needed height adjustment with hole in the middle to clear the bodys spring stay. You'll need to slice from the hole to the outside diameter so you can slip it in without having to remove the spring. I did this with .25" hard rubber mat we use at work to raise the back almost a 1/2" easy.
"Lastnight the wife said oh boy when your dead you can't take nothing with you but your soul oh "Think"
- John Lennon


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