I have a dual cylinder corvette style master cylinder on my 49 fleetline. It is mounted with a booster under the floor. Anyone know the fitting sizes for the front and rear ports? I need to buy a couple of fittings. I know they are both bigger than 1/4 inch... Thanks
The easier way is to take the master to the auto supply. Go to the br*** fitting section and look at the master cylinder fittings. Here most have weather head brand
That would be the easy way to do it... but it is a major pita to remove the master cylinder... disconnect all the lines, and remove the remote fill too... it is way easier for me to ask lol I have a free port with a plug on it where I need to plumb up a brake switch, and another port to ...
In that case, pick up a couple flare nuts (for 5/16 and 3/8 tubing) and give them a try. Than you can go back to the parts store and get the proper size flare nuts that will fit a 3/16 inch. Hope this helps.
if you know the exact year and application of the master cylinder , looking it up on Napa online will usually tell you the port size
My book shows 9/16-18 and 1/2-20 for the stock master On 67-76 vette Those are the thread sizes, you would need the appropriate nut or adapter for your line
I just checked the M/C on my 69 with manual brakes. Both tubes are 1/4" OD. The wrench size on both nuts is 9/16". Can't tell for sure the thread size on the nuts, but from what I can see of the exposed area it looks like both are 1/2-20.
Read 54fierro's post. One other thing, make sure the fittings are for your tube size, 3/16 or 1/4 most likely. Check this: http://www.speedwaymotors.com/GM-Corvette-Cast-Iron-Master-Cylinder-1-Inch-Bore,51673.html
Wehen i don't know, i make a good guess. Than i buy a bag full, do the job, take the rest back. My parts man would call it fitting wars...mlmlml
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