Steering question

Mark Yacavone · 12-07-2016, 02:39 PM

Quote:

Originally Posted by Ed Wright

Wonder what makes the 3rd gen cars shimmy at landing without one? My 4th gen never has. This is the first I've heard of this. Interesting.

Ed, I would say then, that the camber and toe in changes are more radical on the 3rd Gen. cars.
After all , they weren't designed to recover smoothly from a wheelstand.

Anyone ever try to fix that, or are you stuck with a band aid solution?

Signman · 12-07-2016, 02:55 PM

Quote:

Originally Posted by Mark Yacavone

Ed, I would say then, that the camber and toe in changes are more radical on the 3rd Gen. cars.
After all , they weren't designed to recover smoothly for a wheelstand.

Anyone ever try to fix that, or are you stuck with a band aid solution?

Mine never shook before and has not since replacing ball joints, put the damper on for safety.

Eman · 12-11-2016, 01:09 PM

Quote:

Originally Posted by Mark Yacavone

Ed, I would say then, that the camber and toe in changes are more radical on the 3rd Gen. cars.
After all , they weren't designed to recover smoothly for a wheelstand.

Anyone ever try to fix that, or are you stuck with a band aid solution?

I'd say the only true fixes would be to stop wheelstanding or replace the complete frt. chassis/suspension which wouldn't be feasible for a stocker. 4ht gens have a different geometry.
You have to experience it to really understand how violent it can be. I'm 240lbs and couldn't hold the wheel to get the car back under control when it happened. Spectators thought I broke something badly on the car. My car isn't a stocker and doesn't wheelstand very high.

Rory McNeil · 12-11-2016, 04:18 PM

[QUOTE=Eman;522057]I'd say the only true fixes would be to stop wheelstanding or replace the complete frt. chassis/suspension which wouldn't be feasible for a stocker. /QUOTE]

You never know, with enough complaints and lobbying, maybe NHRA will allow Stockers to replace the stock front suspension with a Chrome Moly, round tube clip, with lightweight Lamb struts and brakes. All in the interest of "Safety", of course!!

Ed Wright · 12-11-2016, 04:49 PM

[QUOTE=Rory McNeil;522077]

Quote:

Originally Posted by Eman

I'd say the only true fixes would be to stop wheelstanding or replace the complete frt. chassis/suspension which wouldn't be feasible for a stocker. /QUOTE]

You never know, with enough complaints and lobbying, maybe NHRA will allow Stockers to replace the stock front suspension with a Chrome Moly, round tube clip, with lightweight Lamb struts and brakes. All in the interest of "Safety", of course!!

When mine was my daily driver/toy I put all that under mine. Lots of money for not much weight loss, (~ 10 lbs) almost no improvement in toe & camber change (that wasn't where the toe-in change was anyway) all I gained was screwed up scuff radius. Drove like crap.
Sold it all to a kid impressed with all the light (looking) tubing. Toe change is mostly the spindal-to-steering rack height difference.

PozQB14 · 12-11-2016, 04:59 PM

I'm pondering getting my k member on my 86 camaro super stocker build done from Ed Quay. They relocate the lower control arm mounting holes as well as make room for a different pan, planning on using a Stefs pan. Anyone have any experience with how that effects the trajectory of the car?

Mark Yacavone · 12-11-2016, 05:04 PM

Quote:

Originally Posted by PozQB14

They relocate the lower control arm mounting holes

;-)

Mark Yacavone · 12-11-2016, 05:01 PM

Eman, I haven't studied this enough to concede that nothing can be done.
If the 4th gen. cars have different geometry, then it seems to me that would be the place to start looking.
BTW, modifying A-arms for alignment purposes ,has been going on since at least the 70's.
Ask Jack Arnew about that.

Ed Wright · 12-11-2016, 05:40 PM

Quote:

Originally Posted by Mark Yacavone

Eman, I haven't studied this enough to concede that nothing can be done.
If the 4th gen. cars have different geometry, then it seems to me that would be the place to start looking.
BTW, modifying A-arms for alignment purposes ,has been going on since at least the 70's.
Ask Jack Arnew about that.

Been done since the '60s.

Eddie Rezac · 03-07-2017, 02:37 PM

I currently have some racers experimenting with the fix for this problem, at this time. My fix on this wobble when coming down from a wheel stand is to install a stock OEM rubber bushing in the, ilder arm end of the center link. Once installed, point the wheels strait ahead, and tighten nut on the pivot to OEM specs.. That will act as a shock absorber, to help stop the shimmy. Note; It was pointed out to me that the 3rd gen. Camaro, has a pivot built into the end of the center link, so this fix will only work on cars with a replace-able bushing, such as the 55-57 Chevy, early Chevy 2, etc. You may call me anytime for help, or my theory's on front ends, especially for the early Chevy 2.
Eddie Rezac 402 443 8424

12-11-2016, 04:18 PM	#4
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 317 Liked 1,104 Times in 302 Posts	Re: Steering question [QUOTE=Eman;522057]I'd say the only true fixes would be to stop wheelstanding or replace the complete frt. chassis/suspension which wouldn't be feasible for a stocker. /QUOTE] You never know, with enough complaints and lobbying, maybe NHRA will allow Stockers to replace the stock front suspension with a Chrome Moly, round tube clip, with lightweight Lamb struts and brakes. All in the interest of "Safety", of course!! __________________ NHRA 6390 STK M/S 85 Mustang

12-11-2016, 04:59 PM	#6
PozQB14 Member Join Date: Jun 2015 Location: Youngsville, NC Posts: 129 Likes: 24 Liked 42 Times in 17 Posts	Re: Steering question I'm pondering getting my k member on my 86 camaro super stocker build done from Ed Quay. They relocate the lower control arm mounting holes as well as make room for a different pan, planning on using a Stefs pan. Anyone have any experience with how that effects the trajectory of the car?

12-11-2016, 05:01 PM	#8
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,817 Likes: 2,907 Liked 5,125 Times in 1,953 Posts	Re: Steering question Eman, I haven't studied this enough to concede that nothing can be done. If the 4th gen. cars have different geometry, then it seems to me that would be the place to start looking. BTW, modifying A-arms for alignment purposes ,has been going on since at least the 70's. Ask Jack Arnew about that. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

03-07-2017, 02:37 PM	#10
Eddie Rezac Member Join Date: Dec 2003 Posts: 155 Likes: 11 Liked 63 Times in 7 Posts	Re: Steering question I currently have some racers experimenting with the fix for this problem, at this time. My fix on this wobble when coming down from a wheel stand is to install a stock OEM rubber bushing in the, ilder arm end of the center link. Once installed, point the wheels strait ahead, and tighten nut on the pivot to OEM specs.. That will act as a shock absorber, to help stop the shimmy. Note; It was pointed out to me that the 3rd gen. Camaro, has a pivot built into the end of the center link, so this fix will only work on cars with a replace-able bushing, such as the 55-57 Chevy, early Chevy 2, etc. You may call me anytime for help, or my theory's on front ends, especially for the early Chevy 2. Eddie Rezac 402 443 8424 Last edited by Eddie Rezac; 03-09-2017 at 12:42 PM.