MGB & GT Forum
Lightened and gutted rubber bumpers.
Posted by dale s
dale s
Stephen Barnes
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Topic Creator (OP)
Apr 20, 2024 10:00 AM
Joined 5 months ago
70 Posts
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I’ve finally finished the process of removing all the rusty, heavy metal from the front bumper of my Jubilee
It went from really heavy to light enough to lift with one hand!
I made up some brackets to re attach it to the original bumper mounts on the car. Then finished it off with a “factory style” air dam which I think nicely balances the look!
I’m getting ready to start on the rear bumper soon, and want to trim it’s profile down so that it is not such a huge shelf sitting out back.
If anyone has done a similar thing, maybe
You could offer advice on how to cut the rubber down or any other tips. Thanks!
It went from really heavy to light enough to lift with one hand!
I made up some brackets to re attach it to the original bumper mounts on the car. Then finished it off with a “factory style” air dam which I think nicely balances the look!
I’m getting ready to start on the rear bumper soon, and want to trim it’s profile down so that it is not such a huge shelf sitting out back.
If anyone has done a similar thing, maybe
You could offer advice on how to cut the rubber down or any other tips. Thanks!
Apr 20, 2024 11:10 AM
Top Contributor
Joined 18 years ago
4,755 Posts
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How about these ideas:-
https://www.mgexp.com/forum/mgb-and-gt-forum.1/another-take-on-trimming-rear-rubber.3746141/
https://www.mgexp.com/forum/mgb-and-gt-forum.1/cutting-down-rubber-bumpers.2335344/
https://www.mgexp.com/forum/mgb-and-gt-forum.1/more-rubber-bumper-mods-fyi.2012349/
There are more if you go to "Search" above and ask the question.
https://www.mgexp.com/forum/mgb-and-gt-forum.1/another-take-on-trimming-rear-rubber.3746141/
https://www.mgexp.com/forum/mgb-and-gt-forum.1/cutting-down-rubber-bumpers.2335344/
https://www.mgexp.com/forum/mgb-and-gt-forum.1/more-rubber-bumper-mods-fyi.2012349/
There are more if you go to "Search" above and ask the question.
dale s
Stephen Barnes
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Topic Creator (OP)
Apr 20, 2024 11:26 AM
Joined 5 months ago
70 Posts
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Speedracer
Hap Waldrop
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Apr 20, 2024 02:01 PM
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Joined 18 years ago
43,788 Posts
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The same thing was done to my ex-Huffaker MGB race car.
Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com
Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com
Member Services:
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dale s
Stephen Barnes
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Topic Creator (OP)
Apr 20, 2024 02:13 PM
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mgblestyle
Philip Shave
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Apr 21, 2024 12:53 PM
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Joined 7 years ago
628 Posts
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Stephen, your GT looks great, you'll notice the difference now that all that weight in the wrong place is gone. You asked Hap, but I'll tell you that I did leave that metal rod across the top in place. Seems to help the poly keep its shape. Phil
Speedracer
Hap Waldrop
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Apr 22, 2024 09:06 AM
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Joined 18 years ago
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In reply to # 4787286 by dale s
i can only imagine what a fun car to drive that is Hap!
Did you retain the support rod that goes across the top thin area of the “grill”
Did you retain the support rod that goes across the top thin area of the “grill”
Thanks I was lucky enough to get to race that car in 2 SCCA Runoffs and close to 40 races total, it was a great car, that now resides at Huffaker's shop in CA. No, all the OEM grill and parts were removed they made an lightweight interior structure from aluminum, yet it was still rugged enough to push the Porsches out of the way, LOL.
Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com
Edited 1 time(s). Last edit at 2024-04-22 09:08 AM by Speedracer.
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Apr 24, 2024 09:14 PM
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dale s
Stephen Barnes
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Topic Creator (OP)
Apr 25, 2024 09:18 AM
Joined 5 months ago
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The brackets I made from galvanized steel bent into a three sided box that fits inside the lip of the bumper in the same manner as the original armature. Then a couple of flat backer pieces that fit like the old rivet strip
to spread out the pinching force.
There are four brackets. Two that hold the bumper on the car, and two that hold and position the shaper bar that goes across the top of the grill
The holes that the main mount bolts go through is oversized to facilitate position
adjustment of the bumper to the car
to spread out the pinching force.
There are four brackets. Two that hold the bumper on the car, and two that hold and position the shaper bar that goes across the top of the grill
The holes that the main mount bolts go through is oversized to facilitate position
adjustment of the bumper to the car
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dale s
Stephen Barnes
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Topic Creator (OP)
Apr 25, 2024 10:08 AM
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V8MGBV8 and Speedracer thanked dale s for this post
Aridgerunner
Bill Bussler
Montoursville, PA, USA
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Apr 25, 2024 04:01 PM
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Joined 11 years ago
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Because I own 77 B I am interested the end result. Have you noticed a difference in acceleration and handling?
My B is black and the bumpers are in excellent shape and I actually like the way they look. Especially now that car is lowered.
Si Vis pacem, para bellum
My B is black and the bumpers are in excellent shape and I actually like the way they look. Especially now that car is lowered.
Si Vis pacem, para bellum
dale s
Stephen Barnes
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Topic Creator (OP)
Apr 26, 2024 09:03 AM
Joined 5 months ago
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Bill, I cannot give a fair comparison to before and after performance figures. I took the heavy, corroded bumper assemblies off the car soon after purchase, before I had it running I drove it around almost a thousand miles with no bumpers before I started working to lighten them.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
Speedracer
Hap Waldrop
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Apr 26, 2024 09:18 AM
Top Contributor
Joined 18 years ago
43,788 Posts
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In reply to # 4789479 by dale s
Bill, I cannot give a fair comparison to before and after performance figures. I took the heavy, corroded bumper assemblies off the car soon after purchase, before I had it running I drove it around almost a thousand miles with no bumpers before I started working to lighten them.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
Keep having fun with your car, that is what really matters, and for that I applaud your efforts
Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com
Member Services:
MG/ Triumph Performance Street Engines -
Cylinder Head Porting for street performance and race -
DIY Engine Rebuild Kits With Free Tech Advice -
VTO alloy wheels for British Sports Cars, and others
Speedracer
Hap Waldrop
|
Apr 26, 2024 09:18 AM
Top Contributor
Joined 18 years ago
43,788 Posts
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In reply to # 4789479 by dale s
Bill, I cannot give a fair comparison to before and after performance figures. I took the heavy, corroded bumper assemblies off the car soon after purchase, before I had it running I drove it around almost a thousand miles with no bumpers before I started working to lighten them.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
I can tell you that after installing the front bumper along with the factory style air dam
I took the car out on the highway at speeds
significantly above 80mph and the car was noticeably quieter and more stable than I had experienced before the installation.
As far as acceleration is concerned, the metal mass that I removed from the bumpers is comparable to a passenger and I know I can feel the difference when accelerating with someone riding with me
Front suspension, rear suspension and lowering are next, and I’m sure will improve the handling significantly.
Keep having fun with your car, that is what really matters, and for that I applaud your efforts. No doubt there is plenty of room for improvement in the MGB
Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com
Member Services:
MG/ Triumph Performance Street Engines -
Cylinder Head Porting for street performance and race -
DIY Engine Rebuild Kits With Free Tech Advice -
VTO alloy wheels for British Sports Cars, and others
Jim Blackwood
* BlownMGB-V8
Gunpowder Rd, Florence, KY, USA
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Apr 26, 2024 05:24 PM
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Joined 17 years ago
8,014 Posts
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Removing pendulum weight is a step in the right direction and will make the car a little quicker and more responsive to steering inputs. Also helps in the power/weight department. It is not really necessary to get it down at or below CB ride height to make it handle well, depending on your goals. There are in fact some advantages in keeping the RB ride height. Easier to get in and out of the car, more ground clearance, less scraping of the exhaust, things like that. To make the car handle well at the RB height some work is needed with the sway bars particularly and stiffening up the springs and shocks a reasonable amount can help too. The shocks are the easy part. TR6 valves and then maybe a little thicker oil if you feel it's needed. Lots of guys go overboard on this stuff, unless you are racing the car it's usually overkill.
Jim
Jim
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