[Roadsters] rear brake cylinders

[Pete Peters]

I'm guessing it had to do with maintaining the correct bias between front and rear after going from the single reservoir master cylinder (pre-67.5) to two. 

Kinda haveta do all the math to see the theoretical difference.......but not tonight. <g>

Pete

 -------------- Original message ----------------------
From: "Gary and Cindy Ault" <aultgc at att.net>
> I'm not a racer, so I don't know how much effect putting the 3/4 wheel 
> cylinders may have on overall brake performance.  I.e., will it improve 
> baking overall? Nissan must have had a reason for increasing the size of the 
> rear wheel cylinders with the '67-1/2 cars.
> 
> I've never found the brakes on my '66 with 11/16 cylinders to be wanting, as 
> long as I stand on them hard enough.
> 
> Gary
> 
> ----- Original Message ----- 
> From: "Pete Peters" <ppeters914 at comcast.net>
> To: "Datsun Roadster List" <datsun-roadsters at autox.team.net>
> Sent: Thursday, October 23, 2008 9:36 PM
> Subject: Re: [Roadsters] rear brake cylinders
> 
> 
> > True, but folks have reported replacing the early 11/16 rear wheel 
> > cylinders with the later 3/4 (or 12/16) wheel cylinders without issue.
> >
> > If upgrading an early 11/16 to the later 3/4 (12/16) is okay, maybe 
> > upgrading the later 3/4 (12/16) to 13/16 might be okay. I believe 13/16 
> > were used on 510 and 520, maybe other models. Dunno if they'll fit, 
> > though.
> >
> > 15/16 are for the all-drum SPL310 and PL411.
> >
> > Pete
> >
> > -------------- Original message ----------------------
> > From: "John F Sandhoff" <sandhoff at csus.edu>
> >> > I have read that the 15/16" rears are usable on the later model cars.
> >>
> >> Changing cylinder size will change the balance between front
> >> and rear brakes, and change the brake pedal travel and force
> >> required.
> >>
> >> -- John
> >>      John F Sandhoff   sandhoff at csus.edu   Sacramento, CA
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