Master cylinder

[jbcollier]

That will work just fine.

[Grumblebuns]

You may find that the 7/16-20 female fitting for 3/16" brake lines extremely difficult to find here in the US. If you find a source, let us know.

[califkid_66]

The original brake lines going into the master is 3/8 24 and the other is 7/16 20
The new master is m10 so I’m keeping the same brake lines I’m putting the new fittings on the mc to give it the same output as the original so I just have to lengthen the lines
The fittings are available 3/8 female to m10 male and 7/16 female to m 10 male


I will post the parts I will use and the steps needed for this modification as soon as it’s done

[jbcollier]

BrakeQuip sells all the fittings, tools, pipe you might require.  Lots of suppliers carry them.

[califkid_66]

Thanks I’m getting the mc at a garage that sell and services British cars
I’m going to ask him how he install them now that they are metric I figure if he services spitfires he must know how to install them properly and should have what I need to install the metric one
Just hope he doesn’t give me same answer I saw on a post
From a retailer “ the threads are the same only the wrench is different “
I hope that’s not the case doesn’t sound safe to me
And the other thing I saw check attachment

[EuropaTC]

I think your idea of using an adaptor piece is the way to go regardless of what the supplier says.

When I fitted on I made up new lines with a metric fitting on one end, imperial fitting on the other to match the rest of the car.  I've made my own lines up before and have all the gear plus a box of fittings so that's my easy option.  I suspect that will be the case for the supplier as well, they'll be used to making custom lines and the customer sees the car looking the same as before, whereas with an adaptor they may ask  "is that a bodge job ?"

I'd not seen adaptors like the ones you found and suspect that if I had seen one I'd have gone that route instead, even though it's an extra joint (to leak    )

Brian

[califkid_66]

Finally got my new master cylinder and also recieved
A rebuild kit I had ordered I didn’t get the fittings yet
So I decided to try to rebuild the old mc
I slightly honed the mc cleaned it up and reassembled
I measured the seals and there was a .014 difference in
Diameter between old and new I think it was leaking because the seals were worn out
You can see the difference in shape old one on the left