Front end rise, rebound bumpers and shock length??
#789655
08/31/10 10:37 PM
08/31/10 10:37 PM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
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Well I think I found something. Located a pair of the long discontinued .840 B body drag torsion bars for sale and bought 'em. They showed up and have been kicking around here for a little while. I wanted to set the front end height the same as before so...before pulling the old bars out I got to doing some measurements and looking at a few things, and then I noticed the damn front shocks are too short! With the rebound bumpers taken completely out, the front end can only move up about 3/8" before the shocks run out of travel....the upper control arm never even touches the rebound bumper. Gee whiz, maybe that's why my car has never picked the front end up worth beans? Maybe that's why I can adjust the shocks to full loose and they always feel the same? Common problem? I found some cheap shock extensions that look like they'll work if I cut them to length. When I extend the shock, then it seems like it'd also help to have some shorter bump stops for the upper control arms? Does anybody have a part number or source for such an animal? Can't believe I never noticed this before, but honestly I never took the time to look Thx
Rich H.
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Re: Front end rise, rebound bumpers and shock length??
[Re: ZIPPY]
#789659
08/31/10 11:24 PM
08/31/10 11:24 PM
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Joined: May 2003
Posts: 961 .
TMP66
super stock
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Quote:
When I extend the shock, then it seems like it'd also help to have some shorter bump stops for the upper control arms? Does anybody have a part number or source for such an animal?
Yes, the part number is called a hack saw, or remove them completely.
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Re: Front end rise, rebound bumpers and shock length??
[Re: TMP66]
#789660
08/31/10 11:31 PM
08/31/10 11:31 PM
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Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
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KENTUCKY
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I was told the .840 bars in a big car (B body) could be an issue as far as longevity on the street ? I "ground" my bump stops down on my grinder,,I know some guys remove them all together,,i wanted to have at least some portion of cushion/rubber there. How much travel do you have on the front end,,,i was told you should have 4-5",,, for me,,to achieve this,,,I had to lower the front end. If i recall the front end ride height on the "X" is set up for the street,,but I love the stance myself... I have QA-1's and some Caltrac's,,,if were ever at the track together,,,your welcome to swap them on your car and try em.... ps,,Huge fan of the "X"
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Re: Front end rise, rebound bumpers and shock length??
[Re: 69CHARGERMD]
#789662
09/01/10 06:47 AM
09/01/10 06:47 AM
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Joined: Nov 2003
Posts: 2,715 closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
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Posts: 2,715
closer to Canadian beer!
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Quote:
I was told the .840 bars in a big car (B body) could be an issue as far as longevity on the street ?
I "ground" my bump stops down on my grinder,,I know some guys remove them all together,,i wanted to have at least some portion of cushion/rubber there.
How much travel do you have on the front end,,,i was told you should have 4-5",,, for me,,to achieve this,,,I had to lower the front end. If i recall the front end ride height on the "X" is set up for the street,,but I love the stance myself...
I have QA-1's and some Caltrac's,,,if were ever at the track together,,,your welcome to swap them on your car and try em....
ps,,Huge fan of the "X"
I've also been told 5" is the magic number. I have a buddy with the same issue on a 67 Dart. It's a big block with a couple of tubes in the fender well. With small tires and deep pan, the front end is up a little higher than it should be and he doesn't have enough travel so the front end comes up and then back down too soon unloading the rear tires.
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Re: Front end rise, rebound bumpers and shock length??
[Re: ZIPPY]
#789663
09/01/10 08:35 AM
09/01/10 08:35 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
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Romeo MI
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Rich, your going to gain alot more stored energy with the small bars... get some longer shocks(alot of guys like the calvert fronts)... if you still need a little more travel grind your snubbers down on a belt sander(a little easier if you freeze them) but dont take them out completely steel on steel tends to upset the chassis... if you grind down the snubbers try to keep a similar shape... the shape is to have a stack up rate... but just make them shorter
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Re: Front end rise, rebound bumpers and shock length??
[Re: MR_P_BODY]
#789664
09/01/10 10:33 AM
09/01/10 10:33 AM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
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Finding that problem explains alot, because everything I tried with the front end has made no difference. I've tried both stock replacement Monroe and QA1 shocks with no change, took swaybar off, no change, etc. Wish I would have noticed it sooner.
Being that I've used two different kinds of shocks I just checked both Monroe and QA1s data, and sure enough they list the same shock for A/B/E body....so both pairs of shocks that I've got are probably the right length for an A body but not long enough for the others.
The QA1s cost enough to where I want to give them a fair shake, so I'll try them with some extensions before going too much further.
Rich H.
Esse Quam Videri
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Re: Front end rise, rebound bumpers and shock length??
[Re: cudarex]
#789668
09/03/10 10:36 PM
09/03/10 10:36 PM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
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Front tires are 27.5, though it says 28" on the sidewall... I might have to settle for 3" of rise because (like lots of others) I've got the front end set kind of high for the time being. Even 3" of rise should be an improvement over the tiny bit it had before, though not as good as 5+". After the shock extensions show up, I'll see what's left of the jounce travel...if that's used up then will have to go to a thicker jounce bumper like this or this. No sense punching the shocks through the inner fenders (roads around here are rough) and want to play it safe there. The stock jounce bumpers are only 1.5" tall and are pillow soft so a taller/stronger bumper should save it from itself. Then I think I'll go with these rebound bumpers to get all the rise I can get out of it. The stockers are 1.5" tall, and mine are showing a little weathering so might as well replace them rather than cut 'em down. That's the plan for now anyway...If that doesn't get it then I'll chase more travel later on I guess. Too many irons in the fire right now.
Last edited by ZIPPY; 09/03/10 10:43 PM.
Rich H.
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