1973 US 911T 2.4 MFI - Mark A

[Mark A]

Hi All,
Can any of you guide me in the right direction to fit a rear anti roll bar, my car left the factory without one.

Anyone fitted rear, Anti Roll Bar, ARB, sway bar to a 911T 73 model year, built late 72?

Looks like I need to weld on brackets? Do I have to relocate the fuel pump which is up back?

Many thanks,
Mark

[911hillclimber]

I did this mod on my 73T.
The location and angle of the wed on chassis brackets is critical.
Iirc there is a circular dimple pressed into the inner panel close to where the torque tube passes.
The factory bracket has a corresponding hole in it so to position the bracket but not its angle.
Loose all the parts in place and clamp those brackets on. The correct angle is when the anti roll bar passes under the gearbox mountin cross beam without touching.
There is very little clearance so be careful.
The brackets are simply mig welded on where the hole passes over the round dimple in the pressing. I welded 360 degrees round.
Did that in 1989 and all is still there!
Hth
Graham.
I think type911 sell the brackets that now come with a stiffening strip.
The factory one must have been weak?

[Mark A]

Thank you Graham, brilliant, just what I was after.

I'm down to a rolling shell at the moment and it sounds like from your advice that I should not attempt to weld those brackets on until I have the gearbox back in?

[Mark A]

Oh Graham, do I need to move the fuel pump, mine is in the rear from the factory. does the ARB fit around it?

[911hillclimber]

Sorry, the pump mount is good as it is.
The weight of the box will drop the crossmember down and if you don't have this right then the bar will touch at times and 'buzz' and you will never find the cause!

The factory must of had a reference for the angle position when the shells were being fabricated, but maybe they had a 'sub-jig' they dropped in place.
Just spotted this on Google, '72 911 S, but these are not factory mounts, but I hope it explains the principle.

Barry must have welded a lot of these on during restorations after restoring all the sheet metal around the torque tube?

[Mark A]

Thanks again Graham

[Darren65]

Positioning when Barry did mine, ask him nicely and he might send you a copy of his card template....fuel pump mount was only removed to save weight and because it wasn't needed.....

[Mark A]

Thanks again Darren, I need a copy of that template , i'll PM Barry.

[Barry]

I should perhaps point out that the above photo shows the raggety remains of the fuel pump bracket because, at the time it was going back on. Later on it was permanently deleted, so the remains were linished away .

You have mail, btw ....

[murph2309]

Yeah, I thought you were being a bit slack there Barry. Going to have to give you some lessons on attention to detail..... . Not....

[Mark A]

Barry has very kindly offered to help me align my brackets. Thank you, Barry.

Pictures to follow when they are welded up.

Thank you, Barry.

[Mark A]

I went to see Lee at Octane garage today as my engine is completely stripped down. Lee was very generous with his time and took me through a multitude of options. I think i'm homing in on the warmed over spec i'm after.

There are decisions to be made

I intend to have the stock 911T MFI upgraded to E spec and go E cams on the engine. I'm keeping the heads standard and will open up the throttle bodies a bit. Partly inspired by the Ragamuffin.

I'm considering 2.2S pistons or 2.7 high compression pistons. Not sure which direction to go. It will be a street car and I want it torquey at usable revs. Any views or opinions out there?

Also I will need an oil cooler kit. I have two battery boxes and was hoping not to disturb them. Lee tells me there is a Tuthills cooler that might work. Anyone tried that? There seems to be the option of a 3.2 oil cooler too.

I'd be grateful for your views/opinions.
Many thanks, Mark

[hot66]

2.7 will mean machining the cases and heads so no going back to stock ever ... Personally I'd get they best out the stock capacity if you're ever thinking of selling in the future

I run high comp 2.4s and the higher comp gives a loverly snappyness ( along with the lightened flywheel)

[911hillclimber]

IMHO I think James is right.
Don't machine the cases, all to valuable nowadays.
The E cam is a great road going cam.
My 2.4 mech inj E engine was wonderful, should never have sold it.

[Darren65]

Nonsense!........build the car and engine YOU want and then go drive it.......lots!

ISA's are a nice way to invest in the future.......early Porsche's are best being driven hard and used lots before you die!