MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
MGB Wheel Hop
Posted by: skootch13
Date: December 06, 2020 07:17PM

My car has the Moss Motors tube shock conversion on it. For some reason, the passenger side top mounting bracket got bent. And then the shock eyelet got warbled. Which caused a clang over bumps.

I got a new top mount and shock and replaced them today. In doing so, I discovered that the PO had put the top bracket on upside down from the instructions. i put the mount on in the "soft" position according to the Moss instructions.

I did a few clutch drops after the install. And now I have wheel hop.

So, experts, do i need to put the bracket on upside down like the PO or can I just put it in the "firmer" position? I don't want to do it two more times if I don't have to.


88v8
Ivor Duarte
Gloucestershire UK
(837 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: MGB Wheel Hop
Posted by: 88v8
Date: December 07, 2020 04:14AM

Mmm, what a pain.

It depends on your spring travel.
Presumably got bent because the suspension bottomed out onto the shock. The shock must never bottom out.

Measure the closed shock length, then measure the distance from the top to bottom mounts that will exist when the suspension is
on the bump stop.

Ivor


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 07, 2020 09:11AM

Hmmm.

Seems like flipping the mount upside down is just goinog to make the shock bottom out and bend the bracket again. And to put the shocks in the "firmer" setting, i would have to remove both the passenger and driver side shock mounts and switch them.

i found this article, which might actually be less effort than pulling the shock mounts and reinstalling them

[www.britishv8.org]

I assume that longer part of the spring goes to the front of the car and the shorter (after cutting) part of the spring goes to the rear.

Edit: I don't understand how the traction bar attaches to the car. Doesn't it have to be secured to the body of the car? The article makes it sound like you just put the center bolt back in and you are done. Am I missing something?



Edited 1 time(s). Last edit at 12/07/2020 09:15AM by skootch13.


MGBV8
Carl Floyd
Kingsport, TN
(4042 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: MGB Wheel Hop
Posted by: MGBV8
Date: December 07, 2020 09:46AM

Stock style MGB rear suspension is prone to wheel hop. Bill Guzman's half leaf spring is a good alternative to traction bars. Yes, the longer part goes to the front.

Make sure your shocks are not too long.


mgb260
Jim Nichols
Sequim,WA
(2082 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: MGB Wheel Hop
Posted by: mgb260
Date: December 07, 2020 12:39PM

Bottom brackets swapped and flipped?


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6008 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: MGB Wheel Hop
Posted by: BlownMGB-V8
Date: December 07, 2020 12:41PM

I found that adding an extra full length leaf eliminated the wheel hop and stiffened the suspension nicely.

Jim


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 07, 2020 02:36PM

Stupid question number 2. Do I need one on both sides?



MGBV8
Carl Floyd
Kingsport, TN
(4042 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: MGB Wheel Hop
Posted by: MGBV8
Date: December 09, 2020 09:33AM

Both. The only people doing one side that I am aware of would be some of the 4x4 crowd.


mgb260
Jim Nichols
Sequim,WA
(2082 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: MGB Wheel Hop
Posted by: mgb260
Date: December 09, 2020 03:13PM

You have to flip and swap the lower mounts and then your shock won't be too long. If you don't the shocks will bottom out.
mgb-rear-tube-shock-conversion.jpg



Edited 1 time(s). Last edit at 12/09/2020 03:29PM by mgb260.


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 11, 2020 09:55AM

Thanks Jim.

it was the upper mount that was flipped upside down.


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 11, 2020 09:57AM

What am I getting myself into in the job to add this spring?

I got a set of old springs and I had to cut the center bolt to take the leafs apart. The springs on my car are low mile and no rust. Am I going to have to again cut the bolt to get the bottom spacer leaf off so I can add the longer leaf?

Here is a video of what I am afraid is going to happen.

[www.youtube.com]


mgb260
Jim Nichols
Sequim,WA
(2082 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: MGB Wheel Hop
Posted by: mgb260
Date: December 11, 2020 02:28PM

Aaron, You wouldn't believe how many don't flip the lower mounts. You wont have to remove the center bolt on your existing springs. You simply sandwich your helper spring between your existing spring and lower bracket.


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 23, 2020 04:07PM

Do I put that smallest leaf spring back in on top of the traction bar?


MGBV8
Carl Floyd
Kingsport, TN
(4042 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: MGB Wheel Hop
Posted by: MGBV8
Date: December 24, 2020 08:59AM

No. That smallest leaf (what Bill Guzman calls the "support leaf") does not go back on at all. It is replaced with the new offset leaf.


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 24, 2020 10:40AM

Yeah, Carl. i figured that out as soon as I dove into the job.

Passenger side is on. Only 3.5 hours. i think I did every step bassackward. With mistake number one being I did not remove the wheel. I spent way too much time trying to get the lower spring pan on. Finally got over my stubbornness and removed the wheel. I was done in 30 minutes after that.

I bet the driver's side is done in an hour.
20201224_095819.jpg

20201224_095808.jpg
20201224_095814.jpg



MGBV8
Carl Floyd
Kingsport, TN
(4042 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: MGB Wheel Hop
Posted by: MGBV8
Date: December 25, 2020 09:32AM

I thought about doing that once upon a time, but didn't.

Please report back & let us know how it does, Aaron.


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: December 30, 2020 11:19AM

Been a lot of salt recently. I may be able to get out this weekend and drive it to see how the car handles now.

I was lucky, the springs are very new so the nuts came off easy and I could reuse them. I was afraid I was going to have to cut the bolts off and use new ones.


88v8
Ivor Duarte
Gloucestershire UK
(837 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: MGB Wheel Hop
Posted by: 88v8
Date: December 31, 2020 05:51AM

For a couple of years, I had a Silver Shadow. Every fastener on that car was rusted. Arrrgh.

I always put marine grease, or copper slip, on external bolts. Saves a lot of bother.

Ivor


skootch13
aaron kuertz
cincinnati
(29 posts)

Registered:
06/30/2020 01:50PM

Main British Car:
1973 MGB Rover 4.6 (I'm told)

authors avatar
Re: MGB Wheel Hop
Posted by: skootch13
Date: January 04, 2021 09:26AM

I finally got to go for a test run. I dumped the clutch from 3-4k rpms several times. The trac bars work as advertised.


MGBV8
Carl Floyd
Kingsport, TN
(4042 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: MGB Wheel Hop
Posted by: MGBV8
Date: January 05, 2021 09:22AM

Great! Thanks for the feedback!
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