Could anyone tell me how you determine the MC bore size?

I've gone for a remote reservoir and got Wiwoods tandem cylinder, as it came with everything (1" bore)

I've no Idea what the original cylinder is off

posted before for pics :

http://locostbuilders.co.uk/viewthread.php?tid=75913

Part# on casting is 64676774. I've been told it looks like EscortCapri, (reservoir is pushed in and screwed to the casing at the push rod end)

With the new MC in place there little to no brake pedal travel before the brakes are fully on, (Not sure how I'll get on with a binary brake)

I knew the bore size would be wrong, a little out and took a flyer on it, but wasn't expecting this

Would anyone have specinfo on old ford MC and or any info how to determine its bore?

Regards

James.

can you not remove the dust cap if there is one and measure the bore?

quote:

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I've gone for a remote reservoir ............... as it came with everything (1" bore)

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I know the bore size of the new MC but not the original.

I just wanted to determine how far out I was.

Ok - now I understand.

The MkII Escort was a 19.05mm bore (3/4" ) for all models except the RS2000 and that was a 20.64mm.(13/16" )

This data taken from the Lucas (Girling) Aftermarket service parts manual

I hope that helps.

1" inch bore is far to big you would have push about 300 pounds on the pedal to get a 1g stop

Small master cylinder bore = less pedal force required.

Ideally you want a 0.7" bore this was Westfield used (originally it came from the Triumph Spitfire 1500). This is available as a Westfield part from the Westfield on line shop or from Brakes Int web site.

Most British cars of the 1970s which didn't have a servo use a 0.75" bore -- but they had much more pedal leverage than the Locost foot well allows.

Most Fords with servo use a 0.81" bore (ie 13/16"

If you look up the Brakes Int web site you will find the bores of brakes cylinders in mm.



[Edited on 12/5/08 by britishtrident]

Forgot to add it is the area of the piston that counts.

Eg 1" bore will require more than twice the pedal force of a 0.7" bore.

Cheers,

Sigh!

"Standard tandem brake master cylinder" on westfield website doesn't list bore size

I've just given them a ring and the guy has no idea and cant help.

....Anyone??

Don't wanna assume its the .7 you've referred to.

I got the wilwood as it had the remote reservoir mount kit, figured it wouldn't be far out.

As for "other" fordtriumph MC, I need a quick fix to remote mount reservoirs.

Been a few posts on here, but all seem a bit hit and miss as far as getting the hose to fit connect to the cylinder.

If someone could say, this part# from here with this part# from here that would be great (the downside of locosts = no part#)

[Edited on 12/5/08 by skidude88]