Join Date: Dec 2009
Location: Hobart Tasmania
My 67 Dunlop’d GTV certainly has a booster, also with Bonaldi M/cyl, as did my 65 before that.
I can’t imagine Alfa would install the vacuum valve for a non-boosted car. Why spend the $$?
The other giveaway is your 22mm M/cyl. Non- boosted cars had 20mm cylinders to lessen brake effort.
In other words, I reckon your car came with a booster, but it’s been removed, most likely due to failure. Your brake lines would likely show a ‘bridge’ fitting of some kind in this case, near where the booster was. Any evidence of that?
Lastly, without the hose, I trust the valve has been disabled or blocked off? Otherwise it’ll be drawing fresh air.
Last edited by Ranz; 06-30-2019 at 04:22 PM.