Rear coilover replacing spring/shock setup

The place for all technical car discussions. If you haven't already, read our Disclaimer first!

Moderator: The Mod Squad

Rear coilover replacing spring/shock setup

Postby stolic » Wed Sep 26, 2012 12:26 am

anyone used anything like this

Image

that's a custom item from T3 for an AE86. Just wondering how the shock tower would handle the combined force of shock AND spring, when compared to the factory setup that has the spring load on the spring perch and bump-stop area....

would it pose a cert issue or am I just splitting hairs? Using something like this for my IRS conversion would certainly make life easier (maybe)

thanks in advance
ImageTA22-build - TA22-blah
I envy those with little interest in cars, for they have money and spare time.
User avatar
stolic
Toyspeed Member
 
Posts: 325
Joined: Mon Apr 13, 2009 1:07 pm
Location: Auckland

Postby Bazda » Wed Sep 26, 2012 12:32 am

You would def need to reinforce the towers on the car.

Failing that I have adjustable spring/perch setup which fits into the OEM locations.
1988 Toyota Levin GTZ 410kw atw @26psi
Join us on facebook - MRP - Manon Racing Products
http://www.mrpltd.co.nz
Turbonetics|Fortune Auto Coilovers|Wilwood brakes|Tilton clutches|
User avatar
Bazda
Toyspeed Sponsor
 
Posts: 5713
Joined: Sat Jun 01, 2002 10:32 pm
Location: Auckland

Postby stolic » Wed Sep 26, 2012 1:53 am

Bazda wrote:You would def need to reinforce the towers on the car.

Failing that I have adjustable spring/perch setup which fits into the OEM locations.


Thanks baz, but I'm putting a narrowed silvia IRS subframe into my TA22 so the OEM spring location won't work ('86 springs are too big for the celicas also :( ) . I'll see what can be done about reinforcement, or just weld in the towers from a sil as I'll be using part of the floor for the subframe mounts anyway.

Cheers
ImageTA22-build - TA22-blah
I envy those with little interest in cars, for they have money and spare time.
User avatar
stolic
Toyspeed Member
 
Posts: 325
Joined: Mon Apr 13, 2009 1:07 pm
Location: Auckland

Postby fangsport » Wed Sep 26, 2012 10:15 am

have a look at turreted Escorts, and the way the rear shock tower is built
I've been a bad bad boy. I should read the rules and behave before I get spanked by an admin

f#@k you i won't do what ya tell me

http://www.facebook.com/pages/Fangwood/225658970893404
fangsport
Toyspeed Member
 
Posts: 4169
Joined: Sun Nov 30, 2003 10:52 am
Location: Timaru

Postby soopachargen » Wed Sep 26, 2012 2:09 pm

Jump on oldschool and have a talk to sheepers, he's done the same with an RA28

http://www.oldschool.co.nz/phpbb/viewto ... epers+ra28
When in doubt, down and out.

"This is the Internet, it has no sympathy and shows no mercy. It feeds on weakness and preys on sensitivity. It will e-kill you at the first opportunity. Be brave or be e-dead." - NZHONDAS
User avatar
soopachargen
Toyspeed Member
 
Posts: 1598
Joined: Thu Aug 05, 2004 1:54 pm
Location: Silverdale

Postby wde_bdy » Wed Sep 26, 2012 2:18 pm

Yeah Sheepers will be the man to talk to, from memory he just built the towers to suit the Skyline rear coilovers? Used a R32 GTR rear in the RA28, narrowed far enough to get 0 offset 17x10s under the back. He might still have the jig he used to narrow the subframe, axles were cut and shut I think then heat treated.

Callum
Image
User avatar
wde_bdy
Toyspeed Member
 
Posts: 2704
Joined: Wed Oct 23, 2002 11:43 pm
Location: Gisborne

Postby stolic » Wed Sep 26, 2012 4:30 pm

Ah yes Mr Sheepers. I've followed his build threads across a few different forums. Infact I blame him for giving me the retarded notion to even attempt this in the first place :lol:

Many in the celica world have quizzed him on his setup and IIRC he said it was a bastard of a thing to do, and if he was doing it over he'd just weld in the floor of a silvia and be done with it. Is it worth while? well have a look at the performance car mag article from a few months back where he compares the handeling of his two (bastard :P ) celicas. I'd say yes.

I guess what I'm looking at, is trying to find an easy, yet safe solution to making a coilover setup work. So I'm exploring 3 different avenues.
1.) Use the above shock setup (OP) for the AE86, and reinforce the existing shock mount. (AE shocks fit

2.) As I intend to get a silvia rear cut to pinch the subframe mounting points, take the towers as well and stitch them in and then use s14 coilovers all round (changing front to s14 hubs as well)

3.) go full custom ah-la Sheepers.

I'm leaning towards option #1 at the moment, based on assumed cost and percieved difficulty. Natually I will be engaging the services of a cert engineer before cutting steel, just want to be armed with as much info/ideas as possible so as not to waste their time.

I did a bit of lunchtime googlage and came up with some interesting solutions to similar conversions ( thanks for the escort lead Fangsport )
found this interesting use of 5in exhaust pipe and 3mm plate :?

Image
Image
Image

in a VL commie I believe.. seems a bit sketchy


Thanks for your ideas and thoughts guys... keep 'em coming :D
ImageTA22-build - TA22-blah
I envy those with little interest in cars, for they have money and spare time.
User avatar
stolic
Toyspeed Member
 
Posts: 325
Joined: Mon Apr 13, 2009 1:07 pm
Location: Auckland

Postby wde_bdy » Wed Sep 26, 2012 4:57 pm

I used the whole floor of a Carina in my Starlet, didn't care about track width/wheelbase changes/completely cutting out guards. Not really suitable if you want to keep stock body lines. Personally I would go with option 2 and replicate the factory geometry from the Silvia to give you a known starting point.
Get hold of Sheepers, go have a chat and crawl all over the 28. Bring a towel for the drool though.

Callum
Image
User avatar
wde_bdy
Toyspeed Member
 
Posts: 2704
Joined: Wed Oct 23, 2002 11:43 pm
Location: Gisborne

Postby evil_si » Wed Sep 26, 2012 10:34 pm

I did a similar thing in a starlet but used 3mm wall tube and 5mm tops,
User avatar
evil_si
Toyspeed Member
 
Posts: 2353
Joined: Sat Nov 01, 2003 6:19 pm
Location: TAURANGA, Pyes Pa

Re: Rear coilover replacing spring/shock setup

Postby Adoom » Wed Sep 26, 2012 10:52 pm

stolic wrote:anyone used anything like this

Image

that's a custom item from T3 for an AE86. Just wondering how the shock tower would handle the combined force of shock AND spring, when compared to the factory setup that has the spring load on the spring perch and bump-stop area....

would it pose a cert issue or am I just splitting hairs? Using something like this for my IRS conversion would certainly make life easier (maybe)

thanks in advance


I am planning on making something similar to fit my starlet without modifying the top shock mounts.

Bazda wrote:You would def need to reinforce the towers on the car.

Failing that I have adjustable spring/perch setup which fits into the OEM locations.

I am expecting to need to do some reinforcing.
I have made adjustable spring perches, but I am not happy with it and want to change it to a coilover arrangement.
User avatar
Adoom
Toyspeed Member
 
Posts: 1516
Joined: Thu Aug 07, 2003 5:36 pm
Location: Upper Hutt

Postby stolic » Fri Sep 28, 2012 11:05 am

Google "rear strut tower reinforcement" and laugh at all the BMWs :lol:

good source of ideas tho.

ImageImageImage
the floor mounts actually tie into the subframe mounting points, which are prone to ripping out apparently 8O

and something from a dirty old 911

Image
ImageTA22-build - TA22-blah
I envy those with little interest in cars, for they have money and spare time.
User avatar
stolic
Toyspeed Member
 
Posts: 325
Joined: Mon Apr 13, 2009 1:07 pm
Location: Auckland

Postby Bazda » Fri Sep 28, 2012 12:11 pm

Id def do something like S14 parts all round.

Easy to get bits for! if you ever had an off and damaged the suspension.
1988 Toyota Levin GTZ 410kw atw @26psi
Join us on facebook - MRP - Manon Racing Products
http://www.mrpltd.co.nz
Turbonetics|Fortune Auto Coilovers|Wilwood brakes|Tilton clutches|
User avatar
Bazda
Toyspeed Sponsor
 
Posts: 5713
Joined: Sat Jun 01, 2002 10:32 pm
Location: Auckland

Postby rx7guy » Sun Sep 30, 2012 10:27 am

I had my ae85 towers reinforced to suit that style coilover. It was just a few hundred bucks to get plate welded over top of the existing shock top.
The torque band is wide and the road is narrow
User avatar
rx7guy
Toyspeed Member
 
Posts: 246
Joined: Sat Aug 20, 2005 3:01 pm
Location: Christchurch


Return to Tech Questions

Who is online

Users browsing this forum: Bing [Bot], Google [Bot] and 27 guests