Rear bumper rubber spacers - Page 3 - Alfa Romeo Bulletin Board & Forums
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post #31 of 167 (permalink) Old 08-29-2018, 08:19 PM Thread Starter
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Rear bumper rubber spacer

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Originally Posted by robo330 View Post
Hi Edgar,
Why don't you choose the best material that you find works and make these parts. Too much input from all of us is confusing! As long as it is made of SKP (Some Kind of Plastic), I am sure it will be fine. Almost definitely superior to the original stuff!
This is an interactive time consuming task that will pay off because we will reach a better result. Not just another repro but the best one.

Ed Bortolini
72 Montreal - Arancio Metallizzato - Finally Ready
68 GTV Veloce - bianco spino - under restoration
97 V6 - 3.0 Spider - rosso 130
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post #32 of 167 (permalink) Old 08-29-2018, 08:29 PM Thread Starter
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Rear bumper rubber spacer

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Originally Posted by robo330 View Post
Great work Edgar!
Now I am going to ask you - can you make the 2 Small Parts for the Ends of the Front Bumper? They go between the Outside Top of the Bumpers and the Small Curved Horns. I don't know anyone who makes these. Thanks!
TAV.128 shows two different parts, left and right. I never had a part like this in my hands before. I will need pictures from a real part to make an evaluation. I propose we finish the bumper rubber spacer and then we start another thread for this one. Maybe Mark could bring some ideas about that part. Is it available anywhere? What do you think?

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68 GTV Veloce - bianco spino - under restoration
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post #33 of 167 (permalink) Old 08-30-2018, 08:59 AM Thread Starter
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Rear bumper rubber spacers

Here are the two initial pictures of the demo part in place:

Material: 3D printing PLA rigid
Thickness: 3mm
Exposed rubber: Circular shape with 5mm diameter

What do you think?


The next 3D demo will be:

Material: 3D printing FLEX flexible
Thickness: 2mm
Exposed rubber: "D" shape with 10mm

We expect to close the project with the second demo so next week we can produce the molds and inject the final parts using EPDM.
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72 Montreal - Arancio Metallizzato - Finally Ready
68 GTV Veloce - bianco spino - under restoration
97 V6 - 3.0 Spider - rosso 130
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post #34 of 167 (permalink) Old 08-30-2018, 09:08 AM
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Edgar,

What I personnally think ?

You are a Demon !!

It looks fantastically GREAT !

Obrigado in the name of our Community.

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 #35 of 167 (permalink) Old 08-30-2018, 09:47 AM
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Hi Edgar,
Congratulations for your work.

The width of the D-shaped part on Mark's picture reads 8 mm.
I have measured on my car and it's 8 mm too.

Who not use this dimension for the next demo part?

Alain.
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post #36 of 167 (permalink) Old 08-30-2018, 02:30 PM
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This looks so brilliant, Edgar. I can't wait to have these ready to go for that day in the distant future when my bumper bar is ready to go on.
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post #37 of 167 (permalink) Old 08-30-2018, 09:39 PM
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This is so exciting!!

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post #38 of 167 (permalink) Old 08-31-2018, 05:30 AM
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Edgar, the part looks excellent! I look forward to seeing the other part for the upper corner joints.

Alain says: (about the upper corner joint)
The width of the D-shaped part on Mark's picture reads 8 mm. I have measured on my car and it's 8 mm too.
Why not use this dimension for the next demo part?

Alain, I suspect that both parts initially had the same 10 mm wide 'D' shaped molding and after installation this dimension changes to 8 mm due to the curvature of the part. Alfa would typically make similar parts like this with the same profile.

Regarding the front bumper, there is only a much smaller rubber gasket that just covers the bottom of the 'banana'.

Mark
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post #39 of 167 (permalink) Old 08-31-2018, 05:37 AM
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Hi Mark ?

Any pic pls for the banana rubber ?

I've gone through my archives and did not succeed in finding one pic with.

Thx.

Pascal.

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 #40 of 167 (permalink) Old 08-31-2018, 09:31 AM
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While searching for a picture of the banana base rubber gasket I found the following that may be helpful.

The banana gasket is rather thin (I would guess the exposed part is about 4 mm) but can be seen in the last two pictures at the end of this thread (since they are difficult to see, I'll take some close up pictures. If you have a Montreal parts book you can see this gasket there as well):

https://www.alfabb.com/bb/forums/alf...s-apart-2.html

Also, the rear bumper is really not all that difficult to remove, once you find the hidden bolts as shown in this thread:

https://www.alfabb.com/bb/forums/alf...r-removal.html

Well done Edgar!

Mark
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post #41 of 167 (permalink) Old 08-31-2018, 10:08 AM
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Very hard to notice...

However, thank you very much Mark for this new bad 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 #42 of 167 (permalink) Old 09-01-2018, 03:50 AM
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Sorry Danny,

Here is a photo of the 5 mm thick seal for the 'Front Bumper Banana Lower Gasket' :
Name:  Montreal front banana rubber gasket.jpg
Views: 140
Size:  187.2 KB

The Montreal Spare Parts Catalogue shows two part numbers for this FBBLG; one part for the right side and one for the left side:
Name:  Front banana base gaskets.jpg
Views: 139
Size:  167.6 KB

Mark
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post #43 of 167 (permalink) Old 09-01-2018, 07:42 AM Thread Starter
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Rear bumper rubber spacers

Thank you for all feedbacks, comments and suggestions. Here are the next rendering pictures. We have made small corrections to better fit the bumper shape and the exposed region now moved from 5mm to 10mm diameter. We also changed the exposed region from a circular to a "D" shape format, following Mark´s suggestion. I think the "turtle head" format is the right one and will cover much better the space between bumper sections.

So, you can notice that the spacer for the lower straight section is ok. We can move to full 3D FLEX final printing and EPLD injection. We don´t expect any surprises in this spacer.

Now, for the upper corner spacer we will need to adjust the top and lower angles. We can not use the same "D" shape (180 degrees). The real angles are around 75 degrees (black lines).

Let´s move ahead. We are very close now.
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Ed Bortolini
72 Montreal - Arancio Metallizzato - Finally Ready
68 GTV Veloce - bianco spino - under restoration
97 V6 - 3.0 Spider - rosso 130

Last edited by Edgar Bortolini; 09-01-2018 at 01:41 PM.
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post #44 of 167 (permalink) Old 09-01-2018, 01:56 PM
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Quote:
Originally Posted by IRONBLOCK View Post
Sorry Danny,

Here is a photo of the 5 mm thick seal for the 'Front Bumper Banana Lower Gasket' :
Attachment 1523420

The Montreal Spare Parts Catalogue shows two part numbers for this FBBLG; one part for the right side and one for the left side:
Attachment 1523422

Mark
Exactly Table 128.

Fantastic find !!

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 #45 of 167 (permalink) Old 09-01-2018, 02:38 PM
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Quote:
Originally Posted by Edgar Bortolini View Post
Thank you for all feedbacks, comments and suggestions. Here are the next rendering pictures. We have made small corrections to better fit the bumper shape and the exposed region now moved from 5mm to 10mm diameter. We also changed the exposed region from a circular to a "D" shape format, following Mark´s suggestion. I think the "turtle head" format is the right one and will cover much better the space between bumper sections.

So, you can notice that the spacer for the lower straight section is ok. We can move to full 3D FLEX final printing and EPLD injection. We don´t expect any surprises in this spacer.

Now, for the upper corner spacer we will need to adjust the top and lower angles. We can not use the same "D" shape (180 degrees). The real angles are around 75 degrees (black lines).

Let´s move ahead. We are very close now.
Cannot wait !

Parabens !!!

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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