Quote:
Originally Posted by grantmax
Ah, ok. So moving to the 22.2 unit isn't outside the realm of reason then. And, based on your preference, the 22.2 is close to ideal. Good news: the ATE 22.2 MC was easy to find.
I have seen a number of posts suggesting the 23.8 unit requires too much effort and should be avoided. I wonder if that was the MC in the 84 targa I had years ago. The brake pedal was quite firm on that car.
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The discussion here is only relevant to non boosted brake 911, ie '76 and earlier( and a few rare '77 versions)
The vacuum boosted cars from '77 on use either 20.64(stock 911) or 23.8(930)
w/ boost you can go below 30 comfortably,
the issue w/ non boosted 23.8mm m/c is it's physical length, It just barely fits w/ a bit of effort, into the allotted space. These all need a longer pushrod so it's best to buy a kit which includes the m/c the matching rod, the plastic port adaptors and hose.
the 22.2 and smaller all use the same push rod and it's smaller and it has 2 sets of ports for, the stock 19 and 23.3 are left facing ports.
for boosted brake cars the 23,8 mm 930 m/c is a straight swap w/ no issues.