Bump steer adapter
Thread Starter
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
Bump steer adapter
I'm looking to improve the bump steer on my '79. Since these only came with power steering, the spindle has a single hole so I cannot use the blocks. Has anyone used this part?
http://www.speedwaymotors.com/Adjust...Heim,3333.html
If this part won't work, what have others used? I looked at the QA1 and Baer kits on Summit and Jegs, but none of those were specifically for a Corvette. They sell several different part numbers for GM applications, so I don't know if there is one that works or what the differences are between each. Can someone school me on this? Thanks.
Maj D
http://www.speedwaymotors.com/Adjust...Heim,3333.html
If this part won't work, what have others used? I looked at the QA1 and Baer kits on Summit and Jegs, but none of those were specifically for a Corvette. They sell several different part numbers for GM applications, so I don't know if there is one that works or what the differences are between each. Can someone school me on this? Thanks.
Maj D
Melting Slicks
Joined: Dec 2009
Posts: 3,229
Likes: 656
From: Thunder Bay
I have the Steeroids rack and pinion setup on my '79. It allows for bump steer adjustment. I've never adjusted it though. Not really sure what I would be looking for. I set it up once when I installed the kit and haven't changed it since, but that doesn't mean I have it right. Maybe you can school me on how to properly set up bump steer.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
I have a pair of those.....used them for a mock up one time. They are made overseas of who reall knows what material. The OEM tie rod end studs are forged...Those are not...if you look at the old Chevy power manual and follow ride height settings bump steer is pretty minimal if those dimensions are adhered to....or you can just bolt something on thinking your doing the right thing. I have bump steer plates/gauges but, they can be emulated if your not going to the nth degree of preparation. The rod end that mounts to one of those studs is also not as strong as a tierod end.
Thread Starter
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
I have a pair of those.....used them for a mock up one time. They are made overseas of who reall knows what material. The OEM tie rod end studs are forged...Those are not...if you look at the old Chevy power manual and follow ride height settings bump steer is pretty minimal if those dimensions are adhered to....or you can just bolt something on thinking your doing the right thing. I have bump steer plates/gauges but, they can be emulated if your not going to the nth degree of preparation. The rod end that mounts to one of those studs is also not as strong as a tierod end.
There are other brands of adapters, I just happen to pick those. Many of them were "universal" and suitable for the GM 10 degree taper. Would these work? Surely someone out there has put together a bump steer kit. Was there any problems? Any feedback or advice would be greatly appreciated. Thanks.
MajD
Safety Car
Joined: May 2004
Posts: 4,350
Likes: 1,578
From: los altos hills california
I'm looking to improve the bump steer on my '79. Since these only came with power steering, the spindle has a single hole so I cannot use the blocks. Has anyone used this part?
http://www.speedwaymotors.com/Adjust...Heim,3333.html
Maj D
http://www.speedwaymotors.com/Adjust...Heim,3333.html
Maj D
Drifting
Joined: Jul 2002
Posts: 1,944
Likes: 20
From: The only Corvettes in Highett Victoria
G'day, mate!
I have a pair of those.....used them for a mock up one time. They are made overseas of who reall knows what material. The OEM tie rod end studs are forged...Those are not...if you look at the old Chevy power manual and follow ride height settings bump steer is pretty minimal if those dimensions are adhered to....or you can just bolt something on thinking your doing the right thing. I have bump steer plates/gauges but, they can be emulated if your not going to the nth degree of preparation. The rod end that mounts to one of those studs is also not as strong as a tierod end.
Good to see you're still hanging around here giving of your knowledge. I hope to see you this year if all the planets line up.
Regards from Down Under.
aussiejohn
Last edited by aussiejohn; Mar 28, 2017 at 03:47 AM.
Instructor
Joined: May 2013
Posts: 186
Likes: 18
From: Lower Mainland British Columbia
VanSteel has a bump steer kit using similar Heim ends.
http://www.vansteel.com/index.cfm?ht...owItem&ID=3846
$380 though!
http://www.vansteel.com/index.cfm?ht...owItem&ID=3846
$380 though!
Race Director
Joined: Jun 2000
Posts: 10,039
Likes: 670
From: FL
I think you mean steering arm not spindle. VBP has a bump steer kit which works and is pretty sturdy but it has two drawbacks. The tie rod end position moves in between the two hole positions on the arm which means you lose some steering ratio. It also requires you to drill out the tapered holes. That makes this change irreversible. I bought a used pair and kept my originals. You never know it's going to work until it's too late. I would guess used arms are fairly easy to find. I didn't know there was a one hole version.
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Race Director
Joined: May 2006
Posts: 18,692
Likes: 2,572
Chevy Power Manual
Thanks for the info...can you tell me more about the Chevy Power Manual you mention? Where can I get a copy?
There are other brands of adapters, I just happen to pick those. Many of them were "universal" and suitable for the GM 10 degree taper. Would these work? Surely someone out there has put together a bump steer kit. Was there any problems? Any feedback or advice would be greatly appreciated. Thanks.
MajD
There are other brands of adapters, I just happen to pick those. Many of them were "universal" and suitable for the GM 10 degree taper. Would these work? Surely someone out there has put together a bump steer kit. Was there any problems? Any feedback or advice would be greatly appreciated. Thanks.
MajD
https://www.duntovmotors.com/Corvett...wer%20Book.pdf
Le Mans Master
Joined: Nov 2003
Posts: 5,771
Likes: 694
From: Maryland
St. Jude Donor '05, '09, '15
Summit has pages of bump steer adapters. This is the type that comes with a Steeroids R&P kit.
https://www.summitracing.com/parts/a...6280/overview/
But there are many others shown.
https://www.summitracing.com/search/...d%20Components
Tom
https://www.summitracing.com/parts/a...6280/overview/
But there are many others shown.
https://www.summitracing.com/search/...d%20Components
Tom
Thread Starter
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
The manual is out of print, I believe there were 6 publications of it. The key section you want is for the Corvette Chassis and here is a link to that section.
https://www.duntovmotors.com/Corvett...wer%20Book.pdf
https://www.duntovmotors.com/Corvett...wer%20Book.pdf
Has anyone done this? If so, how did you implement it? Thanks.
Maj D
Last edited by MajD; Mar 28, 2017 at 05:01 PM.
Thread Starter
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
Summit has pages of bump steer adapters. This is the type that comes with a Steeroids R&P kit.
https://www.summitracing.com/parts/a...6280/overview/
But there are many others shown.
https://www.summitracing.com/search/...d%20Components
Tom
https://www.summitracing.com/parts/a...6280/overview/
But there are many others shown.
https://www.summitracing.com/search/...d%20Components
Tom
MajD
Safety Car
Joined: Nov 2004
Posts: 4,359
Likes: 57
From: Mundelein Illinois
VanSteel has a bump steer kit using similar Heim ends.
http://www.vansteel.com/index.cfm?ht...owItem&ID=3846
$380 though!
http://www.vansteel.com/index.cfm?ht...owItem&ID=3846
$380 though!
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
Thanks for the link. I read through it and it recommends moving the inner tie rod pivot up approximately one half inch. I've read from other posts that this can cause interference issues with the oil pan. Also, wouldn't something like that require a bracket to relocate the pivot points?
Has anyone done this? If so, how did you implement it? Thanks.
Maj D
Has anyone done this? If so, how did you implement it? Thanks.
Maj D
Thread Starter
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
Redvetracr, thanks. The book excerpt I looked at was a little vague on the details. Would you weld the bungs directly over the existing ones? Again, I've heard of interference issues with the oil pan, but I cannot believe the Chevy Power book would recommend this modification if there were issues like that.
What about welding them on the bottom of the relay rod, but closer together? Is it the overall length of the tie rod, or the position? Likely it's both. Have you done this? If so, where did you get the bungs? Thanks again for the additional info.
What about welding them on the bottom of the relay rod, but closer together? Is it the overall length of the tie rod, or the position? Likely it's both. Have you done this? If so, where did you get the bungs? Thanks again for the additional info.
Race Director
Joined: Jun 2000
Posts: 10,039
Likes: 670
From: FL
http://www.ebay.com/itm/68-1968-Rare...5YsIqk&vxp=mtr
$79 for set of used steering arms on eBay. Drill them out and buy the VB&P blocks (which come with shorter tie rods). Easy and reversible.
$79 for set of used steering arms on eBay. Drill them out and buy the VB&P blocks (which come with shorter tie rods). Easy and reversible.