Go Back   Infamous Nissan - Hardbody / Frontier Forums > Tech Area > Suspension

Reply
 
Thread Tools Display Modes
Old 06-22-2012, 02:59 AM   #11
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 204 Times in 147 Posts
Default

UPDATE

The truck was VERY floaty with the over-arced overloads.

I decided not to try the 2WD overloads, but instead I straightened the overloads to have 1/4" clearance front and back. This required bending the front 7/8" flatter, and the back end 5/16" flatter.

I also machined another 1/2" block, as well as a new center pin - the head is 14mm diameter, the shank is 10mm diameter and 90mm long, the threads are 10x1.50mm (that was the die I had). The pin head is 15mm long to center the 6 pinion shim (rather than a shank spacer I made for the previous "now-too-short" bolts).



All this assembled, and I'm freaking leaving it like this because this has been awful. Total waste of time. I would NOT do this again.



To compare previous:

__________________
No longer an active member - The Hideous Hardbody has been sold

Last edited by SkinnyG; 03-15-2018 at 12:40 AM.
SkinnyG is offline   Reply With Quote
Old 06-22-2012, 05:02 AM   #12
1989D21
Infamous "Hard"body
 
1989D21's Avatar
 
Join Date: May 2009
Location: Fremont, CA
Age: 41
Posts: 712
Vehicle: 1989 Nissan Hardbody
Thanks: 53
Thanked 33 Times in 33 Posts
Default

Well that sucks... What if you installed the spacers below the leaf springs instead?
__________________
1989D21 is offline   Reply With Quote
Old 06-22-2012, 05:36 AM   #13
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 204 Times in 147 Posts
Default

I put the spacer above to get the ride height I wanted.

I didn't want to de-arc the leafs more (instead of the two 1/2" spacers) such that they ride negative arc - I don't think that's an optimal arrangement.

I could lose the overloads completely (like the current BellTech leafs do), but that would limit maximum load capacity (I ~do~ use this as a truck), and probably float nasty.

With the leafs flat, they do not transition to the overloads as smoothly. If they were negatively arced, they wouldn't really transition at all (see post #9).

If I placed the spacers below the leafs, there would be more shock travel, but I'd lose the ride height - not really what I want.

So, all this work, and I ended up going from 3" block to 1" block, but (hopefully) vastly improved load carrying.

On the upside - the driveshaft and carrier bearing are happy. And less spring wrap.

I'm hoping this is the definitive answer on "factory" leaf springs.
__________________
No longer an active member - The Hideous Hardbody has been sold

Last edited by SkinnyG; 10-13-2012 at 05:16 AM.
SkinnyG is offline   Reply With Quote
Old 06-22-2012, 05:49 AM   #14
1989D21
Infamous "Hard"body
 
1989D21's Avatar
 
Join Date: May 2009
Location: Fremont, CA
Age: 41
Posts: 712
Vehicle: 1989 Nissan Hardbody
Thanks: 53
Thanked 33 Times in 33 Posts
Default

Fair enough. Is your front hanger re-drilled?
__________________
1989D21 is offline   Reply With Quote
Old 06-22-2012, 06:25 AM   #15
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 204 Times in 147 Posts
Default

Yes. 2-1/2" up (because I could). Compare the last two pics.
__________________
No longer an active member - The Hideous Hardbody has been sold
SkinnyG is offline   Reply With Quote
Old 06-24-2012, 01:26 AM   #16
1989D21
Infamous "Hard"body
 
1989D21's Avatar
 
Join Date: May 2009
Location: Fremont, CA
Age: 41
Posts: 712
Vehicle: 1989 Nissan Hardbody
Thanks: 53
Thanked 33 Times in 33 Posts
Default

Got it.
__________________
1989D21 is offline   Reply With Quote
Old 08-16-2012, 05:22 PM   #17
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 204 Times in 147 Posts
Default

UPDATE

I have not been happy with the results. To the point of fab'ing the parts to put the leaf shackle back and getting an unmolested set of stock leafs, of putting the blocks back in.

Main complaint - the truck seems ~dynamically~ soft. The ride is fine, it just sits back on its haunches on acceleration, and falls on its nose under braking. Kind of like a monster truck wallows fore and aft. Yuck.

Last night I tried an experiment - I pulled the 4WD main overload (there are two overloads on 4WD, and we have two overloads on CDN 2WD's too) and replaced it with the 2WD main overload mounted upside-down (so it arcs downward), and re-installed the 4wd second overload upside-down so it arcs upward (it fit better - might flatten the overload a bit more).

With the overloads sitting closer to the leaf pack, and with the softer 2wd main overload, it seems to ride a lot better, and the fore/aft movement seems much more subdued.

I'll see how this goes, and I'll post a pic later.

Basically - it is stunning how important the overloads are to everyday driving.
__________________
No longer an active member - The Hideous Hardbody has been sold

Last edited by SkinnyG; 08-16-2012 at 05:31 PM.
SkinnyG is offline   Reply With Quote
Old 09-04-2012, 03:49 PM   #18
Motorhead
I <3 WRENCHING
 
Motorhead's Avatar
 
Join Date: Jun 2009
Location: Long Island
Age: 32
Posts: 605
Vehicle: TURBO HB & 2015 FORESTER XT & OLD 944
Thanks: 73
Thanked 56 Times in 44 Posts
Default

Geez.
Motorhead is offline   Reply With Quote
Old 09-04-2012, 03:55 PM   #19
Motorhead
I <3 WRENCHING
 
Motorhead's Avatar
 
Join Date: Jun 2009
Location: Long Island
Age: 32
Posts: 605
Vehicle: TURBO HB & 2015 FORESTER XT & OLD 944
Thanks: 73
Thanked 56 Times in 44 Posts
Default

How bout ur initial setup and spring clamps and pads to eliminate slapping.
Motorhead is offline   Reply With Quote
Old 10-13-2012, 01:44 AM   #20
SkinnyG
UYFBR
 
SkinnyG's Avatar
 
Join Date: Sep 2008
Location: Okanagan Valley - Canada, eh?!
Posts: 1,500
Vehicle: 1994 Hardbody
Thanks: 0
Thanked 204 Times in 147 Posts
Default

UPDATE

I haven't uploaded pics yet, but I have made changes yet again.

A month ago I pulled the extra leaf out, and just rode with:

- De-arced 2WD main
- De-arced 4WD main
- Flipped 2WD overload
- 4WD 2nd overload

The closer proximity of the leafs to the overloads was nicer. Still a bit too much for-aft movement of the chassis. This also dropped the back about 7/16".

Today I pulled it apart again, removed the 1" of spacers bolted to the leaf pack, re-installed the bobbed 4wd 2nd leaf, flattened the 2WD overload and installed 2" blocks machined to 6 taper (edit: this was too much - re-machined to 4 in Feb-2013) and re-center-pinned on the opposite end than what BellTech did (less forward relocation).

It feels a LOT better, but I haven't pushed it yet (carrying two Argon tanks in the back for work). The back should be sitting about a half inch lower still. Frame rails have a bit of rake to them though.

Pics soon, I promise.

So, currently:

- De-arced 2WD main leaf
- De-arced 4WD 2nd leaf
- De-arced and bobbed 2WD 2nd leaf
- Flattened and flipped 2WD main overload
- Unmolested 4wd 2nd overload (I don't remember if it's flipped or not, sorry)
- 2" blocks with 6 taper (edit: reduced to 4 in Feb-2013)
- Relocated shackle mount (moved back maybe an inch?)

This is such a waste of time - I should have left it the hell alone.
__________________
No longer an active member - The Hideous Hardbody has been sold

Last edited by SkinnyG; 02-24-2013 at 02:56 AM. Reason: bad speller exrodinaire
SkinnyG is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 04:57 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.