Bump stop height question (Page 1/2)
Signupacct OCT 04, 01:03 PM

I have a 1987 Pontiac Fiero Gt with the V6 and previous owner lowered the vehicle front and rear.

I would like to restore factory height if I can and have new springs ready to go on the front.

It appears that the previous owner modified the bump stops and made them shorter.

Does anybody know what the factory bump stop heighth is for this model with V6

Thanks in advance

Joe
theogre OCT 04, 01:23 PM
Sorry No data on bumper height...

Restoring Ride weight is often as bad or worse then the lowering job because Many ways "people" lowered a car and a lot of them does other things besides short springs.
Even if only "cut the springs" then car often have damage from hitting things that can bend/stress CA and more.
So you may have more problems then getting OE springs.

Example: If has normal Front low BJ... that and areas using it can be wreck but not break right now. look careful @ low CA hole and knuckle for any damage.
But Many put "lowered" low BJ and often weld it in and need replacing Low CA and BJ.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

Signupacct OCT 04, 01:55 PM

Thank you for your response


Yes understand about ball joint issue and no they were not replaced with lowering ball joints and yes we are going to replace them anyway

but we see evidence of shortening the bump stop heighth and we would like to restore height to whatever it was from the factory

is there anyone who could MEASURE their 1987 Pontiac Fiero GT with V6 please and tell me what it measure's


Thanks in advance
Patrick OCT 04, 03:55 PM

quote
Originally posted by Signupacct:

is there anyone who could MEASURE their 1987 Pontiac Fiero GT...



This was my '84 parts car (as reported Here), but I'd be pretty surprised if the '87 front bump stops are any different.



And yes, the rubber bumper on the end is missing in this photo.

[This message has been edited by Patrick (edited 10-04-2022).]

IMSA GT OCT 04, 05:11 PM

quote
Originally posted by Signupacct:

is there anyone who could MEASURE their 1987 Pontiac Fiero GT with V6 please and tell me what it measure's


Thanks in advance



I can't right now but Fierostore sells replacements in Poly if you don't mind red.
https://www.fierostore.com/...px?s=57208&d=337&p=1
fieroguru OCT 04, 08:45 PM
If they modified the bump stop to the point the tire just cleared the fender, then there really is not need to change it back.
Signupacct OCT 04, 10:52 PM

if I make a turn to left or right to lock or end of turning the steering wheel you hear the tire rub

I have to change the springs anyways so I JUST thought maybe go ahead and correct it while I am there rather than not and have to worry about it later

appreciate the mention of the possibility that it could possibly be left alone
cvxjet OCT 04, 11:43 PM
I cut my bump-stop structures down by 3/4"...The Fiero- like most American cars in the 70s-80s- have very short suspension travel; We still had the Eisenhower-era smooth roads back then, so we really did not need the ability to absorb big bumps.

After I reassembled my suspension and tested it, I found that my large-diameter tires (205/55-16) were rubbing on the fender liner at full suspension compression ...I had converted my "pop-in" rubber bump-stops to bolt-in (Had nuts welded into the metal tubes where the original nubs would have popped in), so I was able to un-bolt them and add a 1/8" thick washer.

My original 1985 crossmember measures to 5 5/16" from the spring seat to the rim at the bump-stop (The actual bump-stop seat is a bit lower (Higher) which would take that 5 5/16" down to 5.25".....
Signupacct OCT 05, 12:46 AM

CVJET

great suggestion

How did you get the rubber stoppers to stay attached to the end of the bumpstop metal cone ?
cvxjet OCT 05, 01:50 AM
I had my welder friend weld nuts inside where the rubber bumpers usually (Normally) pop in....then I got some 1/4" bolts with washers and drilled holes thru where the nub was on those bumpers...The only problem with this whole IDEA is that you have to weld those nuts in there while the metal cones are separated from the crossmember.

Thinking about it now, you may be able to take the crossmember off and cut a small hole in the side of the cone thru which you could install a nut- and some sort of wrench to hold it while you tighten the bolts.

Another idea would be to possibly bolt a spacer onto where the bump-stop hits the A-arm, which would shorten your suspension compression stroke. Just looked at a spare A-arm....You'd have to use a sheet-metal screw because there is no access to the under-side of that bump-stop pad.