[Healeys] Rear wheel cylinders on a BJ8

[i erbs]

Replacing the hydraulic system on the 65 Sprite and found 7/8th cyl on back
brakes. 3/4 is required for disk brake cars. Have replaced with 3/4" units.
Did not drive before, so no i fo on how changing will influence stopping,
but it should now be correct. Plus front disc where cut thin from spec. So
new turned drums and discs and calipers should improve everything. I need
to pull the fuel pump and see if it just needs adjusting. Nearly 100
degrees yesterdy and today, so not working on the car. Long weekend ahead.
Hoping to gave it ready for the car sale area at next weekend's abfm
Portland.

Ira Erbs
Portland, OR
typos and artifacts are the fault of my phone

On Wed, Aug 28, 2019, 1:07 PM Henry A. Morrison <dos_gusanos at msn.com> wrote:

> If you increase the diameter of your rear cylinders, you increase the
> amount of fluid required to move the shoes the same distance, so your
> master cylinder must travel further, more pedal travel, and would probably
> make the problem worse.  Increase the size of your master cylinder and
> reduce pedal travel and probably the pressure in the system given the same
> pedal force application.  I like minimal pedal travel, and like feeling
> like pressing against the wall to get the vehicle to stop.
>
> Sincerely
>
> Henry Morrison
>
> Sent from Outlook <http://aka.ms/weboutlook>
>
> ------------------------------
> *From:* Healeys <healeys-bounces at autox.team.net> on behalf of Chris
> Dimmock <austin.healey at gmail.com>
> *Sent:* Wednesday, August 28, 2019 5:23 AM
> *To:* Michael Salter <michaelsalter at gmail.com>
> *Cc:* healeys at autox.team.net <healeys at autox.team.net>
> *Subject:* Re: [Healeys] Rear wheel cylinders on a BJ8
>
> Seriously,
> So all you men who have fitted rear disc brakes to your Healey, have only
> ever done this in order to "reduce" your rear braking effort?
> To make your rear brakes "less efficient" than they already are?
> And you've fitted Discs to "increase" your unsprung weight, and upset the
> balance of your car?
> Seriously?
> Sincerely, this group used to share ideas.
> Now, instead of people saying "nah, tried that, but I locked rear wheels"
> it's a bunch of hypothetical Wikipedia answers.
> So I will ask again.
> Has anyone else changed their rear wheel cylinders on a 3000 from 3/4 inch
> to 7/8 inch?
> If yes - I'd love to hear your feedback.
> If you've fitted disk brakes on your Jensen Healey, or what ever - I'm not
> interested in your comments. Im not interested in the theory - I'm
> interested in the practice and real results from on the road.
> Too much bullshit internet "searching" is infiltrating this list. I've
> always only answered when I've actually done something.
> Armchair experts who google answers and Have now experience in the
> question I've asked need to pull their head in - that's you Kees.
>
> Has anyone else ever changed their rear wheel cylinders from 3/4 inch to
> 7/8 inch?
>
> If you have? I'd love to hear from you.
> If you haven't, well, I don't really care!
> Yes. I'm pissed off.
> People who have the answer - from experience- don't answer when 4 others
> respond.
> I'm just pissed off
> A lot going on.
> Chris
>
> On 28 Aug 2019, at 2:29 am, Michael Salter <michaelsalter at gmail.com>
> wrote:
>
> Have to agree with Kees on this one.
> We have a brake bias control on AHX12 and I can certainly attest to the
> fact that when the conditions change to "wet" removing a lot of rear
> braking is absolutely essential to prevent the car from swapping ends.
> As most road cars don't have adjustable brake bias I would be very careful
> in trying to increase the rear braking.
> When braking into a corner the last thing you want is the rear end coming
> around, particularly in the wet.
>
> M
>
> On Tue, Aug 27, 2019 at 12:09 PM Kees Oudesluijs <coudesluijs at chello.nl>
> wrote:
>
> Whatch out driving in the rain as the rear brakes will lock the rear
> wheels much quicker than with the smaller pistons.Rear brakes are only
> providing a small portion of the total brake force.
>
> Kees Oudesluijs
>
> Op 27-8-2019 om 18:04 schreef Chris Dimmock:
> > Hi Men
> >
> > I just did. Sick of the rear brakes doing nothing. Freeloaders!!
> > Yes, no problem with seized wheel cylinders, no problem with the
> flexible hose - just bugger all wear on the rear linings.
> > I'll let you know how it goes on my BJ8
> > Best
> > Chris
> >
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