what does it take to get turbo calipers to fita 74 911
 

Hi there,

I have a set of turbo calipers 80 model I want to put on my 74. apart from the rotors what else will I need to o to get them to fit?

cheers

Matt

Fronts will bolt up no problem. It's the rotors that have to have special hats so everything lines up. The rears need machining to fit, but rotors go right on after removal of the dust shields and cutting off of the ears for the shields.

Turbo brakes should only be done in pairs.

Do a search, there is plenty about this subject.

Check out Bill Verburg's homepage for his wisdom. Vehicle Craft, Instant G.

Go here for more info.

http://www.vehiclecraft.com/Brakes/930_upgrade.htm

Matt:

You need:

Front

Factory 930 caliper bolts, spacers, and wave washers.
Factory short brake lines from the caliper to the struts
Custom front flat-hat rotor assemblies (several suppliers of those)

Rear

Machine work and modifications to rear 930 calipers.
Custom spacers.
Factory bolts and wave washers.
1 ft long brake line bent to fit between caliper and boss on top of trailing arms.
Remove rear dust shields and their mounting bosses
Factory 930 rotors

23mm Master cylinder kit

Turbo brakes should ONLY be done at all 4 corners due to brake bias issues.

Enjoy,

I believe you also need the appropriate 23mm master cylinder, assuming you are asking about the complete system, rather than just the calipers / rotors.

Doug

you don't need the 23 mm ; the 19mm gives you a longer pedal as the pads wear, but the modulation (pedal feel) is excellent with the 19.
also you need to make sure you have 3.5" bolt spacing on the caliper mounting area on the front struts. 74 911 came with 3 inch (M caliper), 74 911S and Carrera had 3.5" (S alloy calipers as stock)

VCI can help you with the rest

Take a look, VCI kit.


http://forums.pelicanparts.com/porsche-911-technical-forum/263991-turbo-brakes-vci-oh-yeah.html?highlight=NY6591


Cheers

so I can't just do the front end with a turbo brake upgrade I have to do all four corners.

I was hoping to start with I could put turbo on the front and leave the rear stock until I have enough coin to do the rear.

No

Yes, and the master cylinder

where can I get the rotors the veichlecarft ones are a bit out of my budget being its for street use what is a more cost effective option?

Carrera brakes are the more cost effective option. You will experience bling reduction however.

I want to go cross drilled for cooling I have 15" fuchs so they won't be visible anyway.

I don't want to spend uber dosh but I don't want cheap ass crap niether, and maybe a little bling.

mentally prepare yourself for that lower rear caliper fastener. it gets way harder to access. on the kit i worked on, it was a 10mm allen you needed to get into there.

How wide are your tires? 15" fuchs will show the cross drilled turbo rotors fine, but you are not really expecting cooling issues on the street, are you? Are you going to install the booster assembly? Nothing wrong with wanting bigger brakes just to have them, but this mod is 100% the equivalent of bling on a narrow tired street car.

They are a lot of 'gee whiz' things that can be done to these cars. I have suspension bits on my car that are there because I want them, not because they have any advantage over anything else. I wanted the big brakes for my car for a while, but I never could justify this mod in the end. I went with the Carerra setup with the slotted rotors and it was/is over kill for my car on the street. If I had to do it over again, I would probably step down slightly to an SC setup just to save some more money.

So I can put on carrera brakes? do I have to do it all round or can I get away with just the front? What Year carrera brakes can I put one.

Also my engine (2.7l) will be putting out around 240 bhp (webers, ge 60, ssi, je 10:1 pistons) so will the carrera braking be enough?

x-drilling and slots are not for cooling

Use Carrera fronts only, both rotors and calipers. Leave the rear stock. There will be a small increase in thermal capacity. For street use it won't make a bit of difference. But neither would the 930 brakes in that milieu

What Bill said. I used the Carrera fronts only with a new stock 19mm master cylinder. Its a bolt on deal. Easy. If I could do it over again I would go with the SC calipers & rotors to save some money. Either is more than adequate for the street. FWIW, you don't want to use the Carrera rear calipers because you wont have the proportioning valve. Just use your stock calipers on the rear, or maybe a set from anything up to an SC. If you are going to be doing track work, the Carrera fronts would be considered an upgrade.

Cool, many thanks fellas you proberbly saved me a few bucks, the Carrera option it is.

If the drilling and slots are not for cooling whats if for?

gas and fluid evacuation

Can I put Boxster Calipers on a 74 911?