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78 810 coilover?


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#1 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 08 April 2016 - 09:43 PM

Hi I've got a 78 810 and looking to put coils on it, I've read bits and pieces here and there but nothing conclusive, are the front and rear suspension the same as a 280zx?  Any help would be appreciated, thanks.



#2 datzenmike

datzenmike
  • Location:Vancouver Island
  • Cars:'74 710 sedan, '76 710. prevoius... '78 620, '71 521, '68 510 new '76 B-210

Posted 09 April 2016 - 02:11 PM

They are extremely similar, but not exact. I assume you wish to slightly lower your ride height? There are practical limits to lowering using a stock 810 strut. One is that too much and you risk bottoming out the strut which can severely damage it. Two to three inches is doable and safer if you stiffen the spring.

 

Coil overs are too expensive to waste money on setting the ride height once and then just driving around on them. If you had a race car that needed 'tuning' several times during a race... sure.  Set once on the street, never set again... foolish. The money could be better put to use on new brakes or tires. You can do the same thing for about $25 on the front by using split collars. They are also ride height adjustable. By careful trimming of the stock coil spring you can also increase the spring rate* to what you like.

 

The rear coil can also be trimmed, but not for ride height (never cut the spring for height adjustment) but for increased spring rate*. If too low you just add rubber spacers under the coil to raise it back to what you want.

 

*Increasing the coil spring rate is very important on a lowered vehicle. It would otherwise travel the same distance on a bounce but now you are dangerously closer to the pavement. Increasing the spring rate reduces suspension travel. Most cars come from the factory with a 'soft' suspension and some firming of the spring improves the handing.


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#3 ArchetypeDatsun

ArchetypeDatsun
  • Location:Medford, Oregon
  • Cars:71 521, 72 521, 77 200sx, 79 810, 84 Maxima

Posted 10 April 2016 - 01:26 PM

There isn't anything specific for 810 honestly and that sucks, you will have to try and compare what can fit I would look at 240sx S13 coilovers and Infiniti Q45 Y33 coilovers for those I've seen them on the 81-84 Datsun Maxima 910 matter of fact there was a member who did it for his maxima.

I want coilovers for mine as I'm tired of my cut springs and busted up struts lol.
Do it in a Datsun

#4 Boundish

Boundish
  • Location:Norway
  • Cars:79 datsun 810 wagon 4sp , 85 peugeot 505 turbo 5sp

Posted 11 April 2016 - 01:03 AM

im looking to lower my car maybe 1.5 inches and thinking about using some lowering springs . Found some lowering springs from Australia for the 180/200b (basicly the 810 the rest of the world got) ,but im not sure if the springs fit my 810.

Im not into cutting springs as the stock springs arent stiff enough.


http://m.ebay.com/it...1816?nav=SEARCH

#5 datzenmike

datzenmike
  • Location:Vancouver Island
  • Cars:'74 710 sedan, '76 710. prevoius... '78 620, '71 521, '68 510 new '76 B-210

Posted 11 April 2016 - 04:53 AM

http://m.ebay.com/it...1816?nav=SEARCH

 

They don't even specify the new spring rate. You could easily end up with only a 10 pound increase which would be meaningless. I have a '78 810 FSM that specifies the front coil spring rate at only 95 lb/in. This is very light.

 

 

Im not into cutting springs as the stock springs arent stiff enough.

 

The whole point of trimming the coil spring is it increases the stiffness. You can calculate the current spring rate and then work out how much to remove to increase it a set amount. My 710 springs were just about 100 lb/in. Removing 1.5 coils made it 150 lb/in, an increase of 50%. Trimming also shortens the length but this is secondary to increasing spring rate.


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#6 Boundish

Boundish
  • Location:Norway
  • Cars:79 datsun 810 wagon 4sp , 85 peugeot 505 turbo 5sp

Posted 11 April 2016 - 11:30 AM

http://m.ebay.com/it...1816?nav=SEARCH

They don't even specify the new spring rate. You could easily end up with only a 10 pound increase which would be meaningless. I have a '78 810 FSM that specifies the front coil spring rate at only 95 lb/in. This is very light.



The whole point of trimming the coil spring is it increases the stiffness. You can calculate the current spring rate and then work out how much to remove to increase it a set amount. My 710 springs were just about 100 lb/in. Removing 1.5 coils made it 150 lb/in, an increase of 50%. Trimming also shortens the length but this is secondary to increasing spring rate.


Aha i see. Well i will have to think a little more on it.

Btw what are the dimenisons on the stock 810 steel wheels?

5" or 5.5" and ET30 or 40?

The manual just specifies the tyre size.

#7 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 11 April 2016 - 11:44 AM

I used to build race cars for a living, mostly alms cars and daytona prototypes so I'm a bit of a stickler for doing things as I see correct and doing it once lol.  That being said really trying to stick to a full adjustable coilover with an adjustable lower perch to prevent any bottoming out what so ever no matter how low I want to go.  I don't mind fab work if it comes to it.  Today however I was looking under the car and comparing to an S13, has anyone changed to S13/s14 front spindles?  It looks like I would only have to make a new lower ball joint mount, or possibly just make some new lower control arms, then I could run full S13 coilovers unmodified and it would also allow me to get the rim off the strut allowing me to run wider wheels.

Here is my terd BTW
received_10209248748435297.jpeg



#8 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 11 April 2016 - 12:50 PM

Well doing some more research and measuring mine it appears S13 lower control arms are the exact same length, so thinking I'm going to try S13 front hubs, S13 brakes (may go to Z32 brakes later but for now have some 15"s I have an eye on), s13 adjustable aftermarket control arms, and s13 full coils.  Looks as though I am going to need to make a sway bar bracket or new sway bar and either make or modify the tension rods.  Other than that everything appears to be the right sizes and in the right places, should also bring the strut back some for more wheel clearance.



#9 Lockleaf

Lockleaf
  • Location:Happy Valley, Utah
  • Cars:'71 510 Goon, '90 240SX, '85 720, '69 Roadster, '96 Pathfinder, too much other shite

Posted 11 April 2016 - 01:42 PM

FWIW, Infiniti M30 brakes are about 10% larger, 4 lug, and direct swap on to the s13 spindle.

Also z32 stuff clears most 15s, though not all.

Half Pint ('71 510 Goon) http://community.rat...agon/p?=1269361

 

Audrey ('69 Roadster 1600) http://community.rat...rey-the-ratster

 

Tiny Havok ('85 720 DIY built Crewcab 4x4) http://community.rat...ache/?p=1395455

 

720 Shenanigans http://community.rat...20-shenanigans/


#10 Boundish

Boundish
  • Location:Norway
  • Cars:79 datsun 810 wagon 4sp , 85 peugeot 505 turbo 5sp

Posted 11 April 2016 - 01:45 PM

I used to build race cars for a living, mostly alms cars and daytona prototypes so I'm a bit of a stickler for doing things as I see correct and doing it once lol. That being said really trying to stick to a full adjustable coilover with an adjustable lower perch to prevent any bottoming out what so ever no matter how low I want to go. I don't mind fab work if it comes to it. Today however I was looking under the car and comparing to an S13, has anyone changed to S13/s14 front spindles? It looks like I would only have to make a new lower ball joint mount, or possibly just make some new lower control arms, then I could run full S13 coilovers unmodified and it would also allow me to get the rim off the strut allowing me to run wider wheels.

Here is my terd BTW
received_10209248748435297.jpeg


Sweet lookin 810 ! Wheel dimensions?

#11 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 11 April 2016 - 05:10 PM

Lockleaf, this is true and I could always do a little caliper grinding if I have too haha


Wheels are 15x7 0 offset but theyre gonna go, want something wider and a little more aggressive

#12 datzenmike

datzenmike
  • Location:Vancouver Island
  • Cars:'74 710 sedan, '76 710. prevoius... '78 620, '71 521, '68 510 new '76 B-210

Posted 11 April 2016 - 06:48 PM

Aha i see. Well i will have to think a little more on it.

Btw what are the dimenisons on the stock 810 steel wheels?

5" or 5.5" and ET30 or 40?

The manual just specifies the tyre size.

 

Well the '78 810 had 5J-14" and 175/70HR14 tires but your 810 were 4 cylinder and shorter cars.


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#13 Boundish

Boundish
  • Location:Norway
  • Cars:79 datsun 810 wagon 4sp , 85 peugeot 505 turbo 5sp

Posted 11 April 2016 - 10:42 PM

5J as in 5"? Yeah i know but mine is a US model :P

#14 RedBanner

RedBanner
  • Location:Vancouver washington
  • Cars:body dropped photina ratrod v8 710 4 door convertable

Posted 12 April 2016 - 12:34 AM

as a racecar builder it should be pretty easy to fit the sx stuff you want to run.

REDFLAGGER_zps3eezx2uw.jpg


I LIKE THE OLD CLASSIFIEDS BETTER........‚Äč

#15 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 12 April 2016 - 05:36 AM

Lol that's at my friend's, I live in a warehouse.. literally

#16 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 12 April 2016 - 05:40 AM

Also bumper was hit and tweaked in it when I got the car so decided to cut bumper supports since they were bent and bolts wouldnt come off, no point in saving something thats trashed anyways, been using the tow hooks as jacking points since Ive been working on it alot which is why I havent messed with them, on a side note way to sound like a judgemental s chassis owner!! Thats why I got out of Nissans like 5 years ago because it got old. Want to post some pictures of your cars so I can judge the crap out of them?

#17 datzenmike

datzenmike
  • Location:Vancouver Island
  • Cars:'74 710 sedan, '76 710. prevoius... '78 620, '71 521, '68 510 new '76 B-210

Posted 12 April 2016 - 06:17 AM

.


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#18 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 12 April 2016 - 07:32 AM

still exploring all my options, would these work if I wanted to stay with 810 everything else?
http://www.ebay.com/...LdWAK31&vxp=mtr



#19 datzenmike

datzenmike
  • Location:Vancouver Island
  • Cars:'74 710 sedan, '76 710. prevoius... '78 620, '71 521, '68 510 new '76 B-210

Posted 12 April 2016 - 11:26 AM

$900 when you can do the same for under $30?

 

"Aggressive spring rate" what does this even mean?


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#20 Trashy

Trashy
  • Location:Hudson Florida
  • Cars:74 B210, 70 521, 93 RX7, 90 R32

Posted 12 April 2016 - 12:49 PM

How is something under $30 going to be the same thing