My 911 is a 1974 911 coupe with a 3.5l Motec powered engine.

I have put together a gallery of pictures of my 911.

Gallery pics

Great looking car Pete!! 

Quote: Wildsie at Feb 18, 2009 8:04:09 pm

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Great looking car Pete!! 

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Thanks Mike.  Its taken me a few years.  Its almost there.  Im just finalising a gearbox suspension and brake upgrade then it should be done.

Im pleased to say my car was published in Practical Performance Magazine.

You can see the article here:

Well I am pleased to say my car is back in action.  So this is summary of what I have done:

- RSR coilovers all round;
- Rear suspension towers modified with RSR triangular braces;
- re-shaped torsion tube to let the G50 slot into place;
- RSR type spring plates;
- G50 gearbox rebuilt and quaife diff inserted for good measure;
- G50 pedal box and all hydraulics;
- obviously had to have electronic speedo.  Had it recalibrated to 180mph and re-screenprinted;
- while I was at it had wishbones powdercoated as well as ally cross member.

Been out giving her a test drive today and I have to say I am really pleased with the results.  I like the gear change and the G50 ratio's seem well suited to the power.  The bands are much longer than before.  From a handling perspective she is awesome. She sits firm true and level.  The cornering is just great.  Feels like she's on rails.  Its a much firmer ride and you get a very good feel for how shes handling.

Will sort some pics soon......

Here's some pictures:


RSR Bilstein coilover suspension at the front:




Here's the centre cross member having been powder coated:

Very nice Porsche you've got there

Why dont you install brake rotor shields?

HI VIr2
I dont think Pete would mind me steeling his thunder here but the main reason the shields are removed is to increase the air circulation to enable better brake cooling. Predominantly the more air you can get speeding around the brakes the better especially when on the track. Sometimes the owners fit air ducting of all descriptions to get the air channeled through the centre of the hub and out through the disc internal cooling fins.
Hope this helps.
Regards

Dirty Fuchs.

Quote: Dirty Fuchs at Apr 13, 2009 6:31:42 pm

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HI VIr2
I dont think Pete would mind me steeling his thunder here but the main reason the shields are removed is to increase the air circulation to enable better brake cooling. Predominantly the more air you can get speeding around the brakes the better especially when on the track. Sometimes the owners fit air ducting of all descriptions to get the air channeled through the centre of the hub and out through the disc internal cooling fins.
Hope this helps.
Regards

Dirty Fuchs.

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Thanks for that.  Yes I took them off for exactly these reasons.  The shield seems to increase temperature rather than reduce it.  It also has the side effect of trapping all the brake dust material in the braking area which is the last place you want it to be.

I may go the way you suggest and duct some air to the disc centres.

Here's a summary of the spec of my car:

- 35l Mahle Pistons & Barrels
- Compression ratio 10:5.1
- Jenvey 48mm Taper Throttle Bodies
- Bosch High Flow Fuel Injectors
- 996 GTII Camshaft Profile
- Titanium valve spring retainers
- Titanium Valve Springs rated to 8500rpm
- Twin Spark
- 964 Twin Distributor
- Gasflowed crankcases
- Shuffle pinned crank cases
- ARP Rods
- ARP Head Studs
- Motec M48 Pro engine management
- Sequential Fuel Injection
- Hayward & Scott Equal length Stainless Steel Performance Exhaust

I finally got round to changing my flag mirrors to aeros.

Here's the flags:



and here's after with the Aero installed:




The aeros a bit lighter too.  The flags weigh in at 1700g each while the aeros are just 975g each.  Thats a total weight saving of 1450g.  Every little helps

The gearbox is the cleanest I have seen in a long time nice car .
It is a good upgrade on the brakes nice work.

Thanks Brian

I bought the G50 gearbox second hand and out of the car so I had no idea what the condition was like.

Here it is as I bought it:



Then I rebuilt it with new bearings synchros etc as well as a new quaife LSD.  I had the cases chemically cleaned as well as ultrasonically cleaned.  The end housing at the rear of the box had been welded.  Rather than keep that I bought a new one.  Bloody expensive for such a small item.

This is how she turned out:

You can see my brake upgrade in the suspension pics above, but not a great view so here's about more about the upgrade.

I upgraded to brembo gran turismo's of GTPL's.  They are a more powerful than the brembo big reds and are designed to squeeze under a set of 16" fuchs, although you do need the 951 offset fuchs at the front.

Here's a before and after pic of the front.

Here's the std 3.2c brake setup:



and here's the Brembo GTPL setup:





The upgrade was completed with an upgrade of master cylinder from standard 3.2 to a turbo master cylinder.  I also fitted a brake bias valve from a 964 RS.  Finally I used castrol SRF brake fluid.

The stopping power is incredible.  At high speed they bleed off the speed brilliantly.

Another job done.  I've got a nice shiny ally undertray to replace the crappy old steel one.  The ally is a tough 2mm thick with higher magnesium content for strength and rigidity.  The basic profile is bent and they more contoured areas fabricated and welded.  The depressed mounts are fabricated from aluminium tubing.

For those who like counting the calories - the original steel one weighed in at 6lbs and the new ally one weighs in at 3lbs, so a modest 3lb saving.  Weight saving wasnt my objective though.  I just thought the rusty steel one looked butt ugly

After I built the 3.5 ltr engine I found that it produced a load of crank pressure and oil was comming out the breather pipe from the oil tank.




I have to say it collects a load of oil, especially if I have been driving at high RPMS.


One advantage, is that the condensation that normally builds up around the filler tank neck now collects in the catch tank, keeping the filler tank clean.  This was an accidiential side effect but veery welcome!

Thought you might be interested in how the car sounds.

This is a short clip of the car when the engine was a standard 3.2 Carrera engine:



Here's how it sounds with the same stock 3.2 engine, but with a Hayward and Scott equal length stainless steel exhaust.

Here's a quick video introduction to my 911.  This is before I did the suspension, brakes, gearbox, engine, engine management upgrades.

This is how she sounds now with the 3.5l upgrade, exhaust, twin spark, throttle bodies, exhaust etc: