Flares....

[Gary71]

I know your car, your call and all that but originality gone a bit far maybe? I’m sure with enough post weld treatment (lead?) it would survive, but I’d put money on it showing up in the surface pretty soon if you actually use the car, which I’m sure you will.

Oh and if think Barry groaned about that he hasn’t seen my own fab work up close yet, he’ll want to cut most of it out

[911hillclimber]

I have actually done a fair bit of but welding using gas welding in my hot rod days widening steel wings and chopping roof lines down etc.
It is not that difficult, and if a 21 year old can do it Barry can...
However, the works method can still be good.
It is down to preparation of the inner wing joint after welding.

Why cannot a modern seam sealer be used and localised under body paintable sealer on top of that?

It is used to seal all other body joints under the car, so why not these welds?

Personally, I. Would butt weld all four.

Didn't photographer Mike's body man butt weld his arch extensions on his '107' targa floria car?

[Darren65]

I know your car, your call and all that but originality gone a bit far maybe? I’m sure with enough post weld treatment (lead?) it would survive, but I’d put money on it showing up in the surface pretty soon if you actually use the car, which I’m sure you will*.......

....my preference would be to Butt Weld, and it's certainly Barry's, although for me it's the small details that turn an average rep into a good one.

A detail too far?....maybe, and I'm still in two minds although not concerned about rust as the seam can be protected properly....I'm not even sure a Lap Weld is correct (all the original cars have certainly lived a life!) and basing my assumption on the photos from the Maxted-Page restorations of #9092 and #9109 and he certainly knows a thing or two!......something to ponder



One thing I have asked Barry to do is take a lump hammer to the OSR chasssis leg......





....initially I thought this was unrepaired damage but on two cars?.......most likely a mod that was 'applied' to help with oil pipe clearance and again not very pretty but once you know it's there wouldn't you take a peek at any RS you wasn't quite sure of?

Cheers,

* that's a given!

[Gary71]

My RH rear tyre lightly polishes the oil pipe, so I can see why you need a dent with some ‘bigger’ tyres.

Barry used the words ‘haunted’ and ‘greatly distressed’ in recent conversation, but even if it’s a lap joint it will be the neatest cleanest lap joint ever made.

[Ralph]

Would the chassis leg modification be originally carried out before or after the shell was painted?

To me it doesn't look right bashed in but nicely painted.

Just my thoughts.

[911hillclimber]

Race cars are not always treated nicely, but are effective.
Depression gets those pipes away from large tyres, all that matters.
Some mods will of course be different from car to car.

I used a scissor jack and big blocks of wood on my new rear wings to get outer edge clearance on my hill climb car in the early 90's, bit rough, bit ugly very effective.
They still have that shape today, part of the car.

[Lightweight_911]

Would the chassis leg modification be originally carried out before or after the shell was painted?

To me it doesn't look right bashed in but nicely painted.

Just my thoughts.

This is probably a better indication of what the area looked like 'back in the day' ...



- photo courtesy of Armando Serrano

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[Darren65]

This is probably a better indication of what the area looked like 'back in the day' ...

Thanks Andy that's a great photo .... I have trawled through all Armando's photos but missed that.......for some unfathomable reason hardly anyone takes photos under the OSR arch with the wheel off! ....closest I found with the required mod was this 73 RSR converted to 74 RSR spec by Kremer....



....any thoughts on arch fitment?

Cheers,

[Lightweight_911]

.......for some unfathomable reason hardly anyone takes photos under the OSR arch with the wheel off!
Cheers,

You have to remember that this was the pre-digital & pre-internet era & people who were restoring cars & taking reference photos (invariably using 35mm) were doing so for their own purposes & had no particular interest in (or way) of sharing them. If it was a 'professional' restoration the car's owner was often given an album of relevant photos for their own 'files' which were probably only seen by anyone else - e.g subsequent owners - when the car was sold.

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[neilbardsley]

Can't believe I'm only just seeing this thread. Darren your wife is a saint!

[Darren65]

Can't believe I'm only just seeing this thread. Darren your wife is a saint!

....aye, she's a lucky girl Neil

[Darren65]

I picked up a set of turrets from Ben Coles this week to modify the shock towers through the rear cross member.....



My understanding is that the RS cars were modified in the same way as the RSR's to allow for the fitment of Coilovers even though regular dampers were fitted to the former and I've seen Armando's excellent reference resource in this respect .... https://pbase.com/slidevalve911rsr/911r ... ember_rear ....

...however the modified turrets seem quite a bit wider and comparing my shell (top photo) to various 3.0RS cars the difference isn't obvious....question is was this mod definitely done to the standard 3.0RS or just the RSR's?....





Cheers,

[Darren65]

After looking at the obvious underneath the cars I think I've answered my own question....

....although harder to be certain looking at the top of the rear cross member, especially with the engine in situ, underneath the difference with the shock towers is fairly obvious.....

...my shell with standard shock towers....



...and genuine 3.0RS's with modification for coilovers....





....still a slight grey area as there are RS cars out there without this modification as below however most of these cars have lived a (race car) life and I would suspect this is due to previous incorrect repairs rather than it not being done from the factory....



....ultimately I think if one one standard RS car had this mod then they all did and expect it was an homologation requirement for all RS/RSR's.

Cheers,

[911hillclimber]

Seems an odd mod to be done as coil-over units are not that much larger than the damper tube dia?
Looks like the clearance around the spring top perch is stock, but there is the large flaring out to the chassis rail.

Is it worth getting details of the coil overs you intend to use and check what is needed, or are you, as I suspect, adamant about the authenticity?

[Lightweight_911]

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I think it was 'general practice' for many race teams - including Porsche - to incorporate race modifications into production models (eg 2.7 RS & 3.0 RS) as & when they developed them rather than waiting for official homologation to be granted by the FIA.

There was an article in the Feb '89 edition of "Excellence" which described the restoration of one particular RSR (chassis no.9114609073).

In the text it discusses numerous modifications that the Factory homologated under ‘special provision #30553’ on August 1st 1975 - including the reinforcements to the RSR chassis in several critical areas.

However, despite the fact that these improvements were not homologated with the FIA until 1975, the modifications outlined were part of every RSR sold by Porsche during the 1974 model year…

The inference was that although some of these reinforcements could have been added later, it is more likely that Porsche began incorporating RSR modifications as soon as they developed them - in a similar way that Porsche introduced the shorter 'RSR' rear trailing arms to the later production 2.7 RS models (from chassis no 1409) ...

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