master cylinder bore sizes? handbrakes

Most of what I'm seeing is the use of 5/8" bore. What effect will I get on the handbrake by moving up in bore size to say 3/4"? Just looking for what will work?

Thanks

What do you have for rear brakes?

You will need less motion with the 3/4" but will get less system pressure from the handbrake for a given handle length and strength. I.e., you will have to pull the handle 20% harder.

Mark B.

Thanks for the info. I currently have the stock drums. I will look in to changing out in needed.

With drums it is very probably 2WD. (And AWD's with drum rears 'cept for trucks?) So you won't need gobs of pressure to lock the rears. If RWD, just push in the clutch and yank; for FWD, skip step one.

BTW, with the 3/4" cylinder, you can get the same stroke length/pressure as for a 5/*' by reducing distance from the pushrod connection on your brake lever to the level pivot by 20%. It's all matter of leverage and stroke; you can always trade one for the other.

Regards,
Mark B.

starion887 Wrote: It's all matter
> of leverage and stroke; you can always trade one
> for the other.
>
> Regards,
> Mark B.

Mark, the two factors aren't infinately compensate-able because there is a a couple of other factors.
The hydraulic part of the equation has a wheel or slave cylinder on the other end.
The lever part of the equation is limited by how lobg or how strong the actuation is, hand- foot, etc.

There's "weight" of a brake system; its "feel", how much force you need to exert and there's power or what "this much" foot or hand on pedal or lever yields in results and getting them balanced is hard with guidelines.

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.