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84-87 Front caster adjustment by masospaghetti
Started on: 04-06-2014 11:41 AM
Replies: 11 (457 views)
Last post by: masospaghetti on 05-18-2014 02:32 PM
masospaghetti
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Report this Post04-06-2014 11:41 AM Click Here to See the Profile for masospaghettiClick Here to Email masospaghettiSend a Private Message to masospaghettiEdit/Delete MessageReply w/QuoteDirect Link to This Post
I rebuilt my front suspension a few years ago but didn't pay attention to the caster adjustment in there.

Can this be adjusted without disassembling the whole front suspension?

Also, based on your experience, does the car "feel better" with more or less caster?
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rogergarrison
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Report this Post04-06-2014 01:39 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
You adjust the caster & camber with I think 3 different thickness 'washers' that are on the upper control arm shaft. Different postions of the different washers alter the upper control arm position a tiny bit. Ogre prob has the factory suggestion on his website. You can do it better with the adjustable/slotted ball joints.

I prefer more caster than stock on most of my own cars. Thats what tends to keep the car tracking straight on its own, and returning to center after a turn. They just seem more stable on uneven roads with more and not so 'darty '. To me, if a car pulls in any direction other than perfectly straight on its own, its annoying to drive.

[This message has been edited by rogergarrison (edited 04-06-2014).]

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Patrick
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Report this Post04-06-2014 03:36 PM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by rogergarrison:

You can do it better with the adjustable/slotted ball joints.


Slotted ball joints allow for camber adjustment, not caster.
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fierobug
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Report this Post04-06-2014 06:24 PM Click Here to See the Profile for fierobugClick Here to Email fierobugSend a Private Message to fierobugEdit/Delete MessageReply w/QuoteDirect Link to This Post
Boostdreamer did his, explains what he did. Don't think he tore the whole front suspension apart. Check search under caster. I changed mine to maximum caster with the spacers. Matched both sides close. Car is very steady at high speeds now. Did everything with new front suspension parts also. Floating is gone.

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FIEROBUG!!!!!!!!!!

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rogergarrison
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Report this Post04-06-2014 07:47 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
OK Patrick, didnt know that. I never had to use them myself. On most cars (I know Fiero is different) caster and camber affect each other. I didnt know how they were slotted...just assumed they were slotted to be able to adjust either.
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Patrick
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Report this Post04-06-2014 07:59 PM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by rogergarrison:

I didnt know how they were slotted...just assumed they were slotted to be able to adjust either.


Of course the '88 front end is different, but from '84-'87 the washers you were referring to adjust the caster... and the slotted ball joints adjust the camber. Before the slotted ball joints became available, the only camber adjustment was flipping the ball joints around, so you were basically limited to only two positions. The '88 style was a big improvement.

[This message has been edited by Patrick (edited 04-06-2014).]

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gtoformula
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Report this Post04-06-2014 08:40 PM Click Here to See the Profile for gtoformulaClick Here to Email gtoformulaSend a Private Message to gtoformulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by masospaghetti:


Can this be adjusted without disassembling the whole front suspension?

Also, based on your experience, does the car "feel better" with more or less caster?


You do not need to disassemble the whole front suspension. Just place a floor jack under the lower control arm, raise it up high enough to remove the wheel and remove the upper control arm shaft. The car's weight will keep the spring compressed. I agree that positive caster feels better. The car will track straighter at speed , but may be a bit harder to turn at low speed. Worth the trade off to me. Place all the shims between the rear of the control arm and the stationary upper control arm mount on the frame. That will give you the most caster.
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fffttt1
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Report this Post04-06-2014 08:53 PM Click Here to See the Profile for fffttt1Click Here to Email fffttt1Send a Private Message to fffttt1Edit/Delete MessageReply w/QuoteDirect Link to This Post
A few years ago I found a thread on here that described upper control arm washer placement to increase caster. Did the job on my '87 and the car seems to track much straighter. Isn't as "darty" as it was with stock caster.
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Kevin87FieroGT
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Report this Post04-06-2014 09:05 PM Click Here to See the Profile for Kevin87FieroGTSend a Private Message to Kevin87FieroGTEdit/Delete MessageReply w/QuoteDirect Link to This Post
Here is a current post you might like. Really a simple job if your bolts are free enough to slide out, or have been recently worked on.

http://www.fiero.nl/forum/Forum2/HTML/130901.html
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Boostdreamer
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Report this Post04-06-2014 10:55 PM Click Here to See the Profile for BoostdreamerClick Here to Email BoostdreamerSend a Private Message to BoostdreamerEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Kevin87FieroGT:

Here is a current post you might like. Really a simple job if your bolts are free enough to slide out, or have been recently worked on.

http://www.fiero.nl/forum/Forum2/HTML/130901.html


Yep. Pretty simple. Let me know if you have any questions. It might be better to use the other thread and keep all the info together or at least post a link in it to this thread. PM me if I don't come back in a few days.

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masospaghetti
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Report this Post05-18-2014 12:11 PM Click Here to See the Profile for masospaghettiClick Here to Email masospaghettiSend a Private Message to masospaghettiEdit/Delete MessageReply w/QuoteDirect Link to This Post
Never replied to this, so thank you everyone for the help! This is exactly what I needed to know.

I'll be increasing the caster and will report back how it feels.
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masospaghetti
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Report this Post05-18-2014 02:32 PM Click Here to See the Profile for masospaghettiClick Here to Email masospaghettiSend a Private Message to masospaghettiEdit/Delete MessageReply w/QuoteDirect Link to This Post
I did the adjustment, the driver's side had an extra 3mm washer in there for some reason, was set up with 9mm front / 6 mm rear, no wonder the steering felt like crap. Passenger side was 6mm / 6mm.

Now both are 0 / 12mm (both washers in rear) and I took that extra washer out from the front and threw it away. So far it does feel a lot better, more meaty feel while driving.

BUT, it seems like my toe adjustment is way off now, at least it looks like it. I might have to get another alignment done. Anyone experience the same thing?
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