Is there a replacement diaphragm for the Bonaldi brake booster?

There are outfits here in the US that rebuild brake boosters, try contacting these guys https://harmonclassicbrakes.com/ They may be familiar with or know a cross reference, it looks very much like same era Ferrari, maybe Dino booster.

try contacting these guys in france http://www.etient-freins.com/

www.casafreno.com in Modena Italy have them.

Thanks for the responses.
i am going to inquire who can supply the parts, i will let you know immediately if any of these firms can supply the diaphragms

Martijn,

Martin Hi

where are you lokated. I have a booster avaialble as I did buy a new one due "incompetency" on my side. As booster failed the rubber sealing was missing

if you are in europe ..send me a PM

matthias

Hello everyone

unfortunately, I have been told by the suggested suppliers that the diaphragms are not available for this particular brake booster.

the only option is to look for a comparable one with the same dimensions.
does anyone have experience with this?

regards Martijn

did send you a PM

Hi Martin

some pictures. As said this is from a 73 Euro GTS Pantera. What you see on the surface is Wax, as all parts I did replace in my car where "soaked" with special WAX. Why I replaced it..well see above .."stupidity"

I assume the Mangusta folks to make a judgement for Fit

Matthias

You are retro-fitting power brakes? Mangusta's had non-powered breaks. Much easier to locate the Girling (non-power) booster. I don't have the info handy but I recall the unit was easy to find and not terribly expensive. Also, some of the brake lines are soft rubber, which I would imagine must to be converted to hardline if you go with power brakes. I would be a little surprised if that booster fit under the hood. I'll try to measure for you next time I'm in the garage.

Good luck!

Hate to be the bearer of true news......but the Mangusta very much DID come with power brakes!   Likely every last one of them did!

Booster is in the interior of the car, behind the instrument panel!   So much fun to get at..........!

If this was a Benditalia (Bendix Italy????)  piece, it could share parts with a similar Bendix boosters we see here?

Try a local booster rebuilder......but I presume you already have......they are rare fish to find these days!    There is one left here in San Jose........

POWER BRAKE EXCHANGE - 2870 Aiello Dr, San Jose, CA

Cheers!
Steve

Oops! Sorry for the confusion, yes I do have that barrel of hate under the dash.

Should there be vacuum lines running to it from the engine? Where does the power in power brakes come from?

Potentially that's why my brakes seem to require so much foot pressure to bring the car to a complete stop?

Thx

SCIFI,

YES! That could indeed be a BIG source of your requirement for a BIGFOOT!!!

There should be a 13mm pipe of sorts in the front boot area (under the covers?) which connects to the under dash booster via rubber hose. From there the pipe runs into and along the inside wall of the center spine, exits with the water tubes and continues down the LH side of the rear lower frame structure, turning upwards at the rear of the engine aprox at the engine/bellhousing joining line.

It continues upwards perhaps a foot or so, which is where it is supposed to connect to a 3/8" -13mm ID rubber vacuum line which travels up and connects to the rear of the intake fitting (that should be there!).

There should be a check valve on the booster itself, and these are known to go bad.....effecting a vacuum leak to the engine......but these can be checked easy enuf......  Ping me back if you need more on that....

Note in pic below, black tube at bottom left frame member, curves upwards, thru red shop towel and is capped with a green cap just peeking out over the frame reinforcement on the shock tower.   You can also see where it snakes around to the front and into the spine tunnel.  At this point I believe there is a rubber hose joint of sorts there.   I had removed the pipe to paint it......so it is NOT one continual piece to the front of the car.

Cheers!
Steve

(here are pics of the takeoff from the manifold, the bent hard line to the left of the engine (original next to my replacement). The second hardline runs in parallel with the radiator cooling tubes in the spine, with a hose from the center to the booster).

Hello everyone,

Finally managed to test fit another brake booster.
I was able to get an 8 inch bonaldi model from our supplier.
Due to its 1inch larger size, it only just fits.
The wiring harness and heater have less room, but it just works!

Now that it has been fitted it can go back to the supplier to be reconditioned.

Thank you all very much for your input!

I recall seeing "Benditalia" on a component......which was allegedly a deal between Bendix and Italy something or other......?????    It wouldn't surprise me at all if a Bendix diaphragm and internal parts are or could be sourced from a Bendix booster of the days???    Case is different of course, as it has the small bolt pattern for the brake M/C.  But you're looking for the innards!

I also recall seeing some new assemblies not that long ago, booster and M/C from some Euro parts source for Ferraris and Aston Martins???????  I thought Lee may have posted........   Someone must have posted it here....?????

Great progress pic's!!!! Keep 'em comin!!

Steve

Martin, your 8" booster may be the Gr-3 Pantera brake booster. I installed one in a CA street-racer Pantera back in the '80s that also barely fit. i was told (maybe by Wilkinson) that thanks to someone exceeding his personal skill-set, then running his home-repaired Pantera under a semi-trailer and his heirs suing the distributor, Bendix-Italia immediately stopped selling repair parts. After that, only complete assemblies were available. All 308-series Ferraris and maybe a few Maseratis also use the 8" booster. Never checked the Deauville/Longchamp booster sizes.