Steering, Suspension, & Brakes

tips, technology, tools and techniques related to non-driveline mechanical components

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MG four six eight
Bill Jacobson
Wa state
(298 posts)

Registered:
10/23/2007 02:15AM

Main British Car:
73 MGB Buick 215, Eaton/GM supercharger

Re: Steering Damper
Posted by: MG four six eight
Date: November 15, 2011 03:39PM

Chris
The steering dampener does help. The biggest difference I noticed is when driving over railroad crossings. Jim is correct though in that the farther out-board your wheels are spaced, the more sensitive the steering will be to road shock.

Bill


cgill
Chris Gill
Salmon Arm, British Columbia
(129 posts)

Registered:
08/13/2009 12:06AM

Main British Car:
1979 MGB roadster Buick 300 stroker with EFI

authors avatar
Re: Steering Damper
Posted by: cgill
Date: November 15, 2011 05:56PM

I'm only running a 1/4" spacer on each front wheel. Would removing that make much of a difference?


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5821 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Steering Damper
Posted by: BlownMGB-V8
Date: November 15, 2011 06:54PM

It could make just enough.

JB


MGB-FV8
Jacques Mathieu
Alexandria, VA
(299 posts)

Registered:
09/11/2009 08:55PM

Main British Car:
1977 MGB Small Block Ford, 331 Stroker

Re: Steering Damper
Posted by: MGB-FV8
Date: November 15, 2011 10:26PM

Wheel offset can complicate the original OEM center line design; caster change can also contribute to wheel shimmy. Here a nice article on steering and alignment problems.....
[www.niumotorsports.com]

Jacques


74ls1tr6
Calvin Grannis
Elk Grove,CA
(1150 posts)

Registered:
11/10/2007 10:05AM

Main British Car:
74 TR6 / 71 MGB GT TR6/Ls1 71 MGB GT/Ls1

authors avatar
Re: Steering Damper
Posted by: 74ls1tr6
Date: November 18, 2011 06:00PM

I would agree, that the further out the wheel is mounted from center line of hub and wider tires would result in road shock. I'm running a bolt on 1" spacer from 4 x 4 1/2" bolt pattern to a 4x100mm bolt pattern, with a 45+ mm offset wheel. Let me tell you that when I hit any bump or slight pot hole on the freeway, I need to be holding on to steering wheel. The tire width or foot print is about 9 1/2 " on the road with a 245/45/17 tire.

I will be looking into this shock setup very soon. I thought is was bump steer but my car didn't move off the straight line of travel.



Edited 1 time(s). Last edit at 11/18/2011 06:10PM by 74ls1tr6.


roverman
Art Gertz
Winchester, CA.
(3005 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Steering Damper vs scrub radius
Posted by: roverman
Date: December 05, 2011 07:34PM

I consider scrub radius the enemy. I suspect some folks run a larger steering wheel or dampeners, because of excessive amounts. Calvin, it sounds like your car suffers from positive scrub radius ? Can you adjust for more ball joint/king pin inclination, to reduce the scrub radius ? Good Luck, roverman.


74ls1tr6
Calvin Grannis
Elk Grove,CA
(1150 posts)

Registered:
11/10/2007 10:05AM

Main British Car:
74 TR6 / 71 MGB GT TR6/Ls1 71 MGB GT/Ls1

authors avatar
Re: Steering Damper
Posted by: 74ls1tr6
Date: December 06, 2011 09:32AM

Art,

Took the TR6 to Les Swab here in town and had a 4 wheel alignment done. It needed it for sure since building the car. I had it pretty close from eye balling it.

Front needs more caster still, but I added metal plates(to stengthen) at the wishbone arms attaching points. By doing this I need to install lomger bolt studs for more caster adjustment.

Front and back I'm running negative camber @ 1.5 all four wheels.

Front toe in 1/16... back 0 toe in

Running 30psi in all four tires and myself in car while doing the alignment.

So after alignment it was a world of difference. I'm in the process of adding 12.19 vented rotors up front with Wilwood 4 pot calipers. At that time when apart, will add in loger bolts to achive more caster. Also my suspension doesn't have much deflection because of the use of nylatron bushings. That being said, I feel everything at the steering wheel. When apart, I'm taking out a 3/4" spacer under the spring to lower the front back down an 1". In the end I think it will curb the problem out.

Thanks Art for your interest!



roverman
Art Gertz
Winchester, CA.
(3005 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Steering Damper
Posted by: roverman
Date: December 06, 2011 05:15PM

Calvin, some irs's use small toe-out at static, knowing they will pull in under load. Cheers, roverman.
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