| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
07-05-2011, 01:34 PM
|
||||
|
||||
Disc/Disc M/C Options
I am contemplating the addition of rear disc brakes on the T/A. I want to retain the stock look of the M/C and booster. What is the down side to this? Are there any makers of M/Cs that look stock but function with a disc/disc combo? What would that M/C require as far as bore size and stroke travel?
__________________
Bob Woodard Brighton, MI 2012 SRT8 Charger - 12.70 @ 111mph |
|
#2
07-05-2011, 04:44 PM
|
||||
|
||||
Use a MC- Booster and distribution valve from a 79/81 TA. They have stock 4 wheel disc.
__________________
Its ok to giggle and snicker, Dont laugh and point |
|
#3
07-05-2011, 07:39 PM
|
|||
|
|||
|
and a 76 and up caddy eldorado mc with dual disc option. This is best wih disc brake systems that use alot of volume of fluid
|
|
#4
07-06-2011, 07:48 AM
|
||||
|
||||
|
Quote:
__________________
Bob Woodard Brighton, MI 2012 SRT8 Charger - 12.70 @ 111mph |
|
#5
07-09-2011, 12:20 AM
|
||||
|
||||
|
The vette master cylinders from that era (C3 = '68 up) are made for 4 wheel discs,and they're more or less identical in appearance to most any GM master cylinders from that era,and they should bolt up to the existing booster no problemo.
So that vette MC should look pretty "stock" to 99% of folks out there. All the power brake master cylinders from that era were all 1 1/8" bore,so that's NBD. That would be the route I would go for a deal like that... FWIW Bret P. |
|
#6
07-09-2011, 10:23 AM
|
||||
|
||||
|
The master out of a 79 T/A w/Rear disc looks like the traditional masters of T/A's past(cast Iron) in '80 or '81 not 100% sure which, master went to the separate plastic reservoir type.
__________________
1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. 12 Bolt 3.73, 4 wheel disc. All A/C cars |
|
#7
07-09-2011, 11:25 AM
|
||||
|
||||
|
The 79-80 4WD and the 81 4wd boosters are both dual diaphragm and have more assist and use LESS pedal leverage. They do look different but work well even with a lower vacuum at idle-mine has worked well even with only 9". The 79-80 used a 1 1/8" cast iron MC similar to the disc/drum only the disc/drumm had a residual pressure valve for the drums in the rear portion-otherwise looks similar. A 4WD '81 has a larger bore and thus needs a different booster due to being "quick take up" for the new "low drag" front calipers and is aluminum/plastic.Still a 1 1/8". The 79-80 would be one to look at also.
You can use the larger single diaphragm, just be sure and keep the correct pedal ratio. The Vette one looks more like the earlier Camaro/Firebird/Chevelle units. They are available in 1" cast iron(or aluminum from Speedway), or a 1 1/8 for the "HD" brakes. Not sure how yours looks.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
