Mongrel Street Racer

[DustyM]

Cheers,

Darren,

If you get a chance would you take a look at your Turbo calipers and see if you can tell how they are finished (painted or anodised) I'm about to refurb a set and originally I thought they were just painted but now I'm not so sure, they could have been anodised?

Cheers
Jon

[Darren65]

Darren,

If you get a chance would you take a look at your Turbo calipers and see if you can tell how they are finished (painted or anodised) I'm about to refurb a set and originally I thought they were just painted but now I'm not so sure, they could have been anodised?

Cheers
Jon

Hi Jon,

The finish does look like a purple/black anodised finish however this can be scraped off so pretty sure they're painted.

Let me know if you'd like any close up photos.

HTH

[KS]

Fabulous work (as always!).

[DustyM]

Darren,

If you get a chance would you take a look at your Turbo calipers and see if you can tell how they are finished (painted or anodised) I'm about to refurb a set and originally I thought they were just painted but now I'm not so sure, they could have been anodised?

Cheers
Jon

Hi Jon,

The finish does look like a purple/black anodised finish however this can be scraped off so pretty sure they're painted.

Let me know if you'd like any close up photos.

HTH

Thanks Darren, only thing that has me questioning is the fact that the same finish is present inside the bores and on the Pistons, that can't be paint. Will investigate further

Cheers
Jon

[Darren65]

Thanks Darren, only thing that has me questioning is the fact that the same finish is present inside the bores and on the Pistons, that can't be paint. Will investigate further

Cheers
Jon

Actually just emailed you a few photos Jon,

Have a look and let me know what you think?

Cheers,

[Mike]

Jon, stripped to their 4 component pieces they're very straight forward to have anodised.

[Darren65]

Just for reference as the subject was brought up, it appears the correct/current finish for 930 callipers is neither anodised or painted.......it's both!

After a few detailed images and Jon explaining what I was looking at, it appears that the machined surfaces, those that need it, have been black anodised, whilst the cast surface is indeed painted....

....I can only assume that the casts are painted first, then machined and then anodised...the Porsche script is coated with a clear lacquer to keep it bright.

Far easier to anodise everything if refurbishing a set, maybe not correct but they'll look good a whole lot longer....









Cheers,

[DustyM]

I'm still not sure Darren, I've been thinking about it since we spoke and it makes no sense to me that the calipers would go through two processes. I think that they are only anodised but that the coating takes differently to the machined and rough areas of the caliper, giving the two types of appearance and also poorer adhesion on the rougher areas. Still only guessing though, more investigation to be done.... Thanks again for the pictures.

[haasad]

From Darrens pictures I'm sure those calipers are anodised all over. Remember its not really a coating but, effectively, controlled surface oxidising which is stained. Its often clear coated with a wet finish to improve durability, the Porsche letters are silver since they have been machined clean again post anodising then as Darren says clear coated to make the appearance last longer . However happy to be corrected.

In any case I did what Mike did when refurbing the Porsche Branded ones on my car, stripped cleaned and black anodise all over.

[Darren65]

I'm still not sure Darren, I've been thinking about it since we spoke and it makes no sense to me that the calipers would go through two processes.

HNY Jon,

As you know I'm no expert (and often wrong) although I'm pretty certain the main part of the body is paint, it can be scraped very easily and flakes, would anodising do this?....

....however the dark areas on the machined surfaces around the bolt holes, along the spine and the inner flat piston face etc, as well as being a different colour, are rock hard and cannot be marked at all.......I wonder if these areas are treated to an entirely different hardening/heat-resistant process?

The clear coat applied to script is done by hand post machining, it's not uniform and looks like a quick flick of a brush.

You can see here where the painted surface has been scrapped....



HTH

[911hillclimber]

Anodising alum alloys will give a very hard and very thin surface.
Take a look at the anodised window frames (often erroneously referred to as 'chromed'), very hard and very durable.

Paint will come off the anodised surface quite readily as it will off chrome, zinc etc surfaces.

I suspect the calliper castings are machined, anodised (all over), Painted and then detailed.

The cast surface finish and machined surfaces are very different and thus reflect the light differently, hence the appearance of a colour difference.

We make aluminium door handles, anodised, and this gives a really good resistance to corrosion, cast, machined and or polished surfaces.

[Darren65]

Bodyshop back up and running after the Christmas break and time to finish off the bumpers....

....firstly to tidy up our adjustments....and my hacking!...



...looking good in primer....



....backs getting the same black treatment as the underside/interior.....



....I think the detail for the LWB flare has worked well....



....prepped for final paint....



....and colour.....



....not exactly a cost effective process, plain metal bumpers would have been far easier, however really pleased with how these have turned out and despite the rear bumper being a little wide, Rich has mentioned on more than one occasion how good quality the EB Motorsport bumpers are.....final fitting up next week and then build time! ...



Cheers,

[DustyM]

I do like the slots in the rear bumper, I'm going to have a lot of heat to dissipate from that area, will try not to steal your idea though!

[sladey]

Looking awesome

[Darren65]

I do like the slots in the rear bumper, I'm going to have a lot of heat to dissipate from that area, will try not to steal your idea though!

Do it Jon.......not seen them before although doubt I'm the first.

Looking awesome

Thanks Mark