From ‘72T to 2.5 S-R: GeLo Racing #44

[hot66]

Don’t worry about it

[_Baudett]

This is interesting and has always been a topic of debate with my father. Why are you so certain that you need to focus on the lateral bumpers when making cuts in the central rear panel? I’ve attached a photo of 538... I think this point you’re making deserves a separate "Post" investigation, as I have always seen different versions. From my perspective, I consider the vehicle with cuts in the central rear panel to be more original (even though it’s not). Best regards.

[matteo68]

This is interesting and has always been a topic of debate with my father. Why are you so certain that you need to focus on the lateral bumpers when making cuts in the central rear panel? I’ve attached a photo of 538... I think this point you’re making deserves a separate "Post" investigation, as I have always seen different versions. From my perspective, I consider the vehicle with cuts in the central rear panel to be more original (even though it’s not). Best regards.

See my post photo of the factory tour car and 0910 at Nurburgring in April ‘72 above both with exhaust cut-outs circled: you can clearly see the cuts in the bumpers as well as the centre panel. The alignment of the racing headers and megaphones will have dictated the position of the cut-outs and this is the way we will do it too.

[_Baudett]

It will be interesting to see how the metal work is done. I'll be keeping an eye on it!

[matteo68]

Flared rear quarter bumpers taking shape…


Likely just how the factory did them - cut a piece out and weld in the fabricated flared section:

[_Baudett]

It might be worth knowing if the factory used the same piece that was removed from the part to make the bumper or if, on the contrary, they made a cut and added a completely new part. Good job by the bodyworker.
Can you show the inside of the bumper? Is it original?

[matteo68]

Yes the bumpers are original series ones - needed some work but generally pretty good:


These are Matt Blast’s (for 0495) undergoing the same metalwork:


And this is an original set of ST steel bumpers on the Porsport website:

[_Baudett]

Interesting details that I haven’t found in other posts from other forums... I mean, you’re applying a great deal of knowledge here, and I’m extremely grateful for you sharing your 'work.' It’s interesting to finally see how that piece was made. I understand, is it the same work as the white or black car, or is it directly the same piece shown? On the other hand, in the white pieces, you can see that no work was done to fit the exhaust outlets!
Do you know if they then used solder to hide the welds? I understand that in that era, when putty wasn’t used, they might have used lead solder to fill them in, just like was done on the flares, but I’ve never seen photos or heard anyone talk about it!
+
I have a question about the "Blast" parts. Do you have more photos of these? It’s something rather specific, but something makes me think that the part you’re showing is not based on a standard 911 piece, which is what I believed until now. I suppose it’s due to my limited knowledge, but if that part only had welding work on the seam you show and also on the supports, there is a characteristic in these bumpers, in the production models, that is not present in the part you show. Given that in that area the part does not show work done by Porsche, I’m wondering where that part came from. Was it a "prototype part" or did it receive more work than what is apparently visible?
+
I recall that the prototypes of the R/S flares were made from individual pieces welded together; they were not a single piece but rather several sections joined to form the flare. Should I understand that in "early" stages, such as with this "BLAST" vehicle, these bumpers might have come from a different place than the assembly line? Is there any manual on how Porsche workers were supposed to perform the "sheet metal" work on these vehicles? I assume there was some form of training for this.

[matteo68]

You’re welcome Baudett, but please remember I don’t know everything about these cars, no-one does. Indeed there is probably a lot of very detailed information that is not available, whether that still be in the (currently closed) factory archives or has been lost / discarded by the factory many years ago. I consider myself very fortunate to have just two of the 13 M491 911 S competition execution build sheets which shows what competition parts and what specific works were required to build an S-R and these follow on from the Aktennotiz of 16.09.71 which I also have as you know. However these potentially raise further questions for us today but those working in the Sports Department would probably understand these on account of their many years of experience working with Porsche race cars or would have been told verbally what needed to be done by way of clarification.

[matteo68]

[anglophone1]

fab- are you there Friday?

[matteo68]

Can be yes!

[matteo68]

More progress - front arches going on:



Passenger door modified along rear edge to achieve perfect panel gap and aluminium filler paste applied to rear wheel arch butt welds:

[sladey]

Nice

[jtparr]

Good stuff Matt….keep it up….and don’t think about the money….thats not what this hobby is about…it’s the passion
Jp