Front bumper banana rubber - Alfa Romeo Bulletin Board & Forums
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post #1 of 39 (permalink) Old 02-21-2019, 03:42 PM Thread Starter
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Front bumper banana rubber

This is a new thread to cover the front bumper x banana rubbers that are no longer available. Here is a PDF file of the first CAD drawing. It´s a single part that can be used on both sides (destra / sinistra). A mp4 Solid Works animation and a Solid Works STL file are available to those who want to print this part in a 3D printer using a flexible (FLEX) filament. The video file and the STL are not supported here at AlfaBB, so please send me a PM to receive the files for free by mail. As we move forward and test this version we will be able to develop a suitable tool similar to the one we made for the rear bumper rubbers.

As usual feedbacks and suggestions are welcome.
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File Type: pdf Borracha 003.PDF (87.5 KB, 68 views)
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post #2 of 39 (permalink) Old 02-24-2019, 10:34 AM
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Please keep me posted when these parts become available. I didn't even know I was missing them until now! I did a image search to find a example since most cars are missing them.
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1971 Alfa Romeo Montreal, 1972 BMW 2002tii Alpina A4S, 1971 Triumph TR6, 1966 Porsche 912
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post #3 of 39 (permalink) Old 02-24-2019, 03:22 PM Thread Starter
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Front bumper banana rubber

Yes, these parts are shown in the TAV.128
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post #4 of 39 (permalink) Old 02-25-2019, 10:30 AM
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Originally Posted by EdBorto View Post
As usual feedbacks and suggestions are welcome.
Hi Edgar, I commend you for your enthusiasm for taking on this new task and getting the rear bumper segment gaskets done.

It is apparent from the drawing that you provided that the proposed 'banana gaskets' are nothing like the originals. The original gaskets are only 4 or 5 mm thick on the exposed part (not 10mm) and probably 1 or 2mm thick in the 'web' (part between the banana and the front bumper.

I realize that the original gaskets were right and left handed, since there are two distinct Alfa Romeo part numbers. Are you proposing that the gasket for the drawing you provided be cut in half down the center? That may work but why not make the two gaskets just like the originals? I am not sure how difficult it is to remove the bananas but perhaps I could remove mine to send you the gaskets to duplicate. I believe them to be in excellent condition. Perhaps someone has the bumpers off their car and can provide the gaskets for modeling?

Name:  Montreal front banana rubber gasket.jpg
Views: 203
Size:  187.2 KB

Mark

Last edited by IRONBLOCK; 02-25-2019 at 10:34 AM.
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post #5 of 39 (permalink) Old 02-25-2019, 12:39 PM Thread Starter
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Front bumper banana rubber

Hi Mark, appreciate your comments and suggestions. The external exposed dimensions of the cad drawing will be modified to match your car rubber part.

Yes, the original rubbers right and left side were not the same as you can see in the TAV.128 drawing. I am proposing a single simplified rubber for 3D printing rendering. If it matches the interface between the bumper and the banana we will be able to build the flat interior section according to the original.

There is no need to remove the bananas (2 screws) or to send the rubbers.

Again, thank you for your help.
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post #6 of 39 (permalink) Old 03-09-2019, 01:48 PM
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Hello Ed, when you make them, I would like to order a pair.

Regards, Alberto
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post #7 of 39 (permalink) Old 03-09-2019, 10:01 PM
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G'day Ed

I'll see Alberto and raise his bid by 1 pair.

Cheers, Rob
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post #8 of 39 (permalink) Old 03-10-2019, 12:36 AM
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+ 1 pair for me, Ed !

Obrigado

70' Ghibli SSS (one-off - featured in Octane UK #183 + Octane Deutschland #38)
63' 2600 Touring H-Top S.1
64' 2600 Touring H-Top S.2
74' Montreal
66' Moretti 1100R
76' Fiat 130 Coupé
68' Datsun Roadster 2000 Racing...

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post #9 of 39 (permalink) Old 03-10-2019, 06:33 PM Thread Starter
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Front bumper banana rubber

I´m planning to release an updated drawing and 3D printing files very soon.
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post #10 of 39 (permalink) Old 03-11-2019, 02:35 AM
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Great news.

70' Ghibli SSS (one-off - featured in Octane UK #183 + Octane Deutschland #38)
63' 2600 Touring H-Top S.1
64' 2600 Touring H-Top S.2
74' Montreal
66' Moretti 1100R
76' Fiat 130 Coupé
68' Datsun Roadster 2000 Racing...

16' 991 GT3 RS soon...
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post #11 of 39 (permalink) Old 03-11-2019, 10:21 AM
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+1

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post #12 of 39 (permalink) Old 03-11-2019, 01:52 PM Thread Starter
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Quote:
Originally Posted by IRONBLOCK View Post

It is apparent from the drawing that you provided that the proposed 'banana gaskets' are nothing like the originals. The original gaskets are only 4 or 5 mm thick on the exposed part (not 10mm) and probably 1 or 2mm thick in the 'web' (part between the banana and the front bumper.



Attachment 1552972

Mark
Mark, 1 or 2mm in the web region - is it the flat region thickness? The gap between the banana and the bumper? Or both?

Tks.
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post #13 of 39 (permalink) Old 03-12-2019, 09:48 AM
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Originally Posted by EdBorto View Post
Mark, 1 or 2mm in the web region - is it the flat region thickness? The gap between the banana and the bumper? Or both?

Tks.
Hi Edgar,
I just guessed at the 'web' gap between the banana and the bumper being 1-2mm thick (maybe one 1mm is better). I have never seen this gasket off the car.

The part of the gasket that is visible 'around the banana' is about 4 or 5 mm thick -depending on where the measurement is taken. In the attached picture, it looks like 5mm thick in this area (hard to photograph and hold the ruler).

Name:  Montreal Banana Bumper gasket.jpg
Views: 135
Size:  164.7 KB

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post #14 of 39 (permalink) Old 03-13-2019, 02:43 PM Thread Starter
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Front bumper banana rubber

Understood. Thank you Mark.
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post #15 of 39 (permalink) Old 03-14-2019, 02:30 AM
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In Fance, we use to say 'better one who does know than 10 who are looking for".

70' Ghibli SSS (one-off - featured in Octane UK #183 + Octane Deutschland #38)
63' 2600 Touring H-Top S.1
64' 2600 Touring H-Top S.2
74' Montreal
66' Moretti 1100R
76' Fiat 130 Coupé
68' Datsun Roadster 2000 Racing...

16' 991 GT3 RS soon...
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