Narrowing rear control arms

Suspension, including wheel, tire and brake.
User avatar
gooned
Posts: 651
Joined: 07 Jul 2003 23:19
Location: Langley

Re: Narrowing rear control arms

Postby gooned » 07 Nov 2017 18:22

Neato, my head hurts though looking at all the data provided!

User avatar
jeffball610
Posts: 216
Joined: 15 Sep 2006 14:12
Location: Las Vegas, NV

Re: Narrowing rear control arms

Postby jeffball610 » 15 Nov 2017 11:07

It's obvious you guys are much smarter than me. I'm just trying to look at things from my limited perspective in hopes that it helps in some way with what you guys are doing. :D

Looking at your design, have you considered what rear bearing housing you're going to use? Maybe you can just steal it from another car. I was trolling pics of the S13 rear subframe, and I'm seeing a few similarities in your design. Maybe you can use those hubs since they are readily available and pretty inexpensive.
Image
Image

The S13 units have an extra link on the top and the lower control arm mounts to 2 spots on the crossmember, so it may not work for this application. I love fabricated parts, but I like bolt on parts more. If there is any way to reuse parts from another car to save time, money, and headaches, I'm all for it. I'm excited to see where this goes and hoping I can grab a unit myself at some point.
1972 Datsun 510
7-bolt 4G63T, EVO 9 pistons & rods, Garrett GT3076R, "Flipped" Stock Intake Manifold, Toyota R154, Z31 R200 w/ CVs

User avatar
PoorMtnKid
Supporter
Posts: 1186
Joined: 28 Aug 2010 14:43
Location: Las Vegas NV

Re: Narrowing rear control arms

Postby PoorMtnKid » 15 Nov 2017 16:33

Jeff, how would having Byron's brackets affect the use of your system?
looking for pass. side arm rest

User avatar
icehouse
Posts: 3118
Joined: 17 Jul 2005 17:06
Location: Everett Wa

Re: Narrowing rear control arms

Postby icehouse » 15 Nov 2017 17:10

jeffball610 wrote:It's obvious you guys are much smarter than me. I'm just trying to look at things from my limited perspective in hopes that it helps in some way with what you guys are doing. :D

Looking at your design, have you considered what rear bearing housing you're going to use? Maybe you can just steal it from another car. I was trolling pics of the S13 rear subframe, and I'm seeing a few similarities in your design. Maybe you can use those hubs since they are readily available and pretty inexpensive.

The S13 units have an extra link on the top and the lower control arm mounts to 2 spots on the crossmember, so it may not work for this application. I love fabricated parts, but I like bolt on parts more. If there is any way to reuse parts from another car to save time, money, and headaches, I'm all for it. I'm excited to see where this goes and hoping I can grab a unit myself at some point.


The problem is any other suspension design will require cutting out everything and starting from scratch. There is barely room for what we are doing.

The reason we have done everything the way we have is purely so it can bolt into any sedan (Soon a kit for wagons) with minor or no cutting. we may do different bearing carriers one day or who knows.
"People don't like it when shit doesn't match their rule of thumb." Sam

User avatar
icehouse
Posts: 3118
Joined: 17 Jul 2005 17:06
Location: Everett Wa

Re: Narrowing rear control arms

Postby icehouse » 15 Nov 2017 17:12

PoorMtnKid wrote:Jeff, how would having Byron's brackets affect the use of your system?


We will know more when the prototypes are done. I have Byron's brackets in my car. Raising the pivot should help with anti-squat but gotta check and see what it does to toe change.
"People don't like it when shit doesn't match their rule of thumb." Sam

User avatar
Dave Patten
Supporter
Posts: 819
Joined: 20 Jun 2008 13:30
Location: Dunbarton, NH
Contact:

Re: Narrowing rear control arms

Postby Dave Patten » 24 Nov 2017 07:08

icehouse wrote:
PoorMtnKid wrote:Jeff, how would having Byron's brackets affect the use of your system?


We will know more when the prototypes are done. I have Byron's brackets in my car. Raising the pivot should help with anti-squat but gotta check and see what it does to toe change.


Jeff,
With your design, toe can be easily changed by using different width spacers at the crossmember pivot point. If you use smaller spacers to the inside of the rod end it will increase toe-in.
Dave Patten
http://www.FutoFab.com
Dunbarton, NH

User avatar
icehouse
Posts: 3118
Joined: 17 Jul 2005 17:06
Location: Everett Wa

Re: Narrowing rear control arms

Postby icehouse » 24 Nov 2017 16:37

Dave Patten wrote:
icehouse wrote:
PoorMtnKid wrote:Jeff, how would having Byron's brackets affect the use of your system?


We will know more when the prototypes are done. I have Byron's brackets in my car. Raising the pivot should help with anti-squat but gotta check and see what it does to toe change.


Jeff,
With your design, toe can be easily changed by using different width spacers at the crossmember pivot point. If you use smaller spacers to the inside of the rod end it will increase toe-in.



Yep we talked about that just don't know how much adjustment it will give you. We will soon find out.
"People don't like it when shit doesn't match their rule of thumb." Sam

User avatar
mell00510
Posts: 204
Joined: 21 Jul 2010 19:22
Location: Mn

Re: Narrowing rear control arms

Postby mell00510 » 27 Nov 2017 16:05

Just my 2 cents (and what I did to get moar tire) I built a new control arm and when building them I had a jig to hold the hubs and inner pivots completely square at ride height. I also did both brackets on xmember so camber and toe can be adjusted with using poly bushes with no binding. (Not in this pic)
IMG_0434.JPG
IMG_0434.JPG (160.64 KiB) Viewed 150 times
IMG_0433.JPG
IMG_0433.JPG (152.9 KiB) Viewed 150 times

Only problem I ran into was the 17x10 (+50) wheel hit the inner wheel well so I went ahead and did this
IMG_0432.JPG
IMG_0432.JPG (140.4 KiB) Viewed 150 times
And at this point most post is completely irrelevant.... but hey it ideas!! It is back together.
Attachments
photo.JPG
photo.JPG (155.05 KiB) Viewed 150 times
photo 3.JPG
photo 3.JPG (105.19 KiB) Viewed 150 times
datzenmike wrote:Too bad about the fire wall. What does the V8 weigh?

User avatar
icehouse
Posts: 3118
Joined: 17 Jul 2005 17:06
Location: Everett Wa

Re: Narrowing rear control arms

Postby icehouse » 27 Nov 2017 16:45

mell00510 wrote:Just my 2 cents (and what I did to get moar tire) I built a new control arm and when building them I had a jig to hold the hubs and inner pivots completely square at ride height. I also did both brackets on xmember so camber and toe can be adjusted with using poly bushes with no binding. (Not in this pic)
IMG_0434.JPG
IMG_0433.JPG

Only problem I ran into was the 17x10 (+50) wheel hit the inner wheel well so I went ahead and did this
IMG_0432.JPG
And at this point most post is completely irrelevant.... but hey it ideas!! It is back together.



We thought about doing that. We wanted to get as close as we could to zero toe change, raise the roll center and improve anti squat while lastly get more tire. As I haven't driven on it yet it I can't say if it was worth all the trouble. haha :)
"People don't like it when shit doesn't match their rule of thumb." Sam

loungin112
Posts: 187
Joined: 05 Mar 2014 21:34
Location: Colorado

Re: Narrowing rear control arms

Postby loungin112 » 29 Nov 2017 21:54

I think the work you guys are doing is fantastic. No doubt this project has been a journey of trial/error/lessons learned....I mean seriously, you guys are re-engineering a part that datsun determined to be optimal for mass production. Therefore, I doubt it would be an easy endeavor to do better....but it seems you guys are. I can't wait to hear about initial install and impressions. Although it may be a high dollar part, it seems all owners will consider this setup at some point when weighing whether to repair or replace rear control arms. Again, can't wait for the outcome.


Return to “Suspension”



Who is online

Users browsing this forum: No registered users and 3 guests