Front brake upgrade

Started by gtv6sv, August 12, 2015, 08:45:24 PM

Previous topic - Next topic

gtv6sv

What does everyone recommend for the rears? I know there isnt much room back there! I do want to keep it inboard if possible
1970 1750 Berlina
1983 GTV 2.0
1985 GTV6 2.5
1991 164 Q 12V
1992 33 16V S
1999 GTV Twin Spark

Duk

Quote from: Stephen Aarons on August 16, 2015, 09:14:43 PMFor a track day car they are amazing brakes. I am also about to change the rears to outboards. Will use standard GTV6 fronts on the rears.
Also I managed to fit 235 45 17s on my GTV6.

Much easier to get decent rubber on the GTV6's, then. I'd love to have 225 wide tyres on my 75.
Your overall wheel is considerably larger than a standard Alfa wheel.

Quote from: gtv6sv on August 16, 2015, 10:26:33 PM
What does everyone recommend for the rears? I know there isnt much room back there! I do want to keep it inboard if possible

Unless you wonder down the path of spaced original calipers and vented rotor, which doesn't add any more pad area or leverage, then anything else is entirely custom built.
Legal outboards would be a big achievement. That's the path I'd like to go down, but.......................  :o

Anyways, here's what I started to do years ago when I had enthusiasm.
Series 4/5 RX7 Turbo rear calipers on 275mm vented Wilwood rotors with custom rotor hubs. Hand brake mechanism needed to be modified, the caliper had to have 1 of its 2 (for some reason they have 2) bleed nipple bosses ground down and the hole needs to be welded closed. And of course custom caliper mounts. It will require custom made brake hoses.
The Daily: Jumped Up Taxi (BF F6 Typhoon). Oh the torque! ;)
The Slightly More Imediate Project: Supercharged Toyota MR2.
The Long Standing Conundrum: 1990 75 V6 (Potenziata)............. What to do, what to do???

NSharpley

Quote from: Stephen Aarons on August 12, 2015, 10:12:47 PM
305mm rotor and caliper from a GTA. Works extremely well ;D

Very old post, I know ... but I would love to see how you've mounted that caliper to the upright?

I'm looking to do something similar and its obviously not a bolt-on solution.

Cheers

Nick
Current Alfa:
1975 Alfetta GT 2.0 Race car
1979 Alfetta GTV (Resto)
1972 105 2000 GTV (Resto)
1987 Alfa 75 2.5

Past Alfas:
1982 Alfetta Sportiva (briefly in my possession. Restored and sold)
1989 Alfa 75 2.5
1982 Alfetta Sedan 2.0
1976 Alfetta GT

giulia_veloce

Fitting bigger front brakes will usually require larger diameter wheels.
Makes me wonder why people need bigger brakes when the original 75 front ventilated discs + calipers with good pads work really well in a long distance race .


rowan_bris

#19
There is a good looking kit on Facebook at the moment which is reasonably priced and fits under some 15 wheels. 

Here is the link - https://www.facebook.com/groups/867666823289359/permalink/5909075422481782/?mibextid=S66gvF

I think whether better brakes are required or desirable can be a function of how much the performance of the car has otherwise been increased from standard. 

Mick A

Quote from: giulia_veloce on November 28, 2022, 07:55:24 AM
Fitting bigger front brakes will usually require larger diameter wheels.
Makes me wonder why people need bigger brakes when the original 75 front ventilated discs + calipers with good pads work really well in a long distance race .

No need to wonder, yes standard brakes work fine, but a fast car with a fast driver will get brake fade every time.

The reason to move up to the 305mm rotors and GTA calipers is for the consistency in the braking. Also, they fit under 15 inch wheels. 👍