Brake master cylinder dimensions

msggunny

Well-known member
Aug 3, 2007
2,978
3
Holly Ridge, NC
Anyone know what the dimensions are for the SII master cylinder?

I know i have a SIII, but it has the ROW brake system, not the cool NAS dual system and i believe the SII/IIA has the same type as me.

Anyways, found this and it looks like it might work:

http://www.wilwood.com/Products/006-MasterCylinders/004-CRRMC/index.asp

Dont know if its cheaper than the ones i have found, but the type i have is getting harder to find and more expensive....

They also have an alternative for the clutch master too.

Thanks.
 

antichrist

Well-known member
Sep 7, 2004
8,208
0
68
Atlanta, GA
If I recall correctly .75" ID.
I thought it was documented in the shop manual.

Yeah, just checked. Single line non-servo and servo MC's are the same bore size.
 

Attachments

  • Brake_MC_bore.jpg
    Brake_MC_bore.jpg
    9 KB · Views: 11
Last edited:

msggunny

Well-known member
Aug 3, 2007
2,978
3
Holly Ridge, NC
antichrist said:
If I recall correctly .75" ID.
I thought it was documented in the shop manual.

Yeah, just checked. Single line non-servo and servo MC's are the same bore size.

Thanks,

If i wasnt such a lazy bitch i would have looked that up myself.
 

nrene

Well-known member
Dec 16, 2006
759
0
Lovettsville, VA
photobucket.com
That looks like it would work, but it claims a very short stroke.

I'm not sure what the stock stroke is on a II/IIa, but I'd guess it's longer than 1.4 inches.

I'd be interested to see if that works and doesn't create a rock hard feel with no stopping power for the drums... though I've got the SIII servo/vac assist/thinggy in my IIa which works very well and is (slightly) more common.

IIRC, the SIII servo and MC was a bolt on to even the IIa.