#1  
Old 06-11-2020, 10:10 AM
twov8sandat4's Avatar
twov8sandat4 twov8sandat4 is offline
Senior Member
 
Join Date: Aug 2006
Location: Massachusets
Posts: 204
Default What booster/MC combo for disc/disc for 1974 T/A

Hello everyone,

I have not posted for a while. I am finally getting around to giving my T/A some needed attention. One of the things I want to address/upgrade is the brakes. The rear drums needed to be addressed, so did the booster/master. I always wanted to upgrade to rear discs and eventually go the C5/C6 fronts, so this was my chance to start.

I was set on the Right Stuff booster/master cylinder for disc/disc, but they are out until August. So my search led me to two other options: GM Restoration Parts unit for $255:
https://www.firebirdcentral.com/70_8..._p/brc-371.htm

and the Detroit Speed unit for over double the price at $525:
https://www.detroitspeed.com/braking...irebird-050106

I do not want the chrome units flooding the market, nor am I building a pro touring car to convert to an aftermarket manual system. Will the GM Resto unit do the job of working with the future C5/C6 setup? I would rather install that both for price and closer look to original than DSE.

Are there other units out there I am missing? Like factory units from later cars? I have been looking online for a few days, and can't seem to find much more.

The car is a 1974 Trans Am. I've owned it for 30 years in mostly stock form. It's time to upgrade the performance a bit.

Thanks for any and all help.

__________________
Panos
Little Miss G Racing
  #2  
Old 06-11-2020, 01:24 PM
JC455 JC455 is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Fresno,Ca USA
Posts: 2,005
Default

The DSE unit would be my choice. While I agree it's overpriced, there's some good stuff in their kit- notice the molded gasket to seal the firewall? This is something new to me- I've struggled with how to get a proper seal-- here's the answer.
Also notice the machined adapter for the brake clevis? That's a whole other level vs. the cheap, universal stuff with a coupling nut.
The M/C they use is a quick take-up design. The rear port is the front brakes, and vice-versa. I don't know what part number they are using, so there's that advantage too.

Now, there are options- I used a Tuff Stuff 2229NC. It's a 9" dual diaphragm booster. https://www.summitracing.com/parts/tff-2224nc

Then use the reduced angle brackets from DSE- Looks like Summit isn't carrying them anymore...
https://www.detroitspeed.com/brake-b...irebird-050302

Brake pedal clevis kit- https://www.amazon.com/Tuff-Stuff-47.../dp/B003N8OQFQ

Then you'll need an aluminum late model GM M/C- I used one from an S10, but it looks like it's been D/C'd. Probably somewhere around $100...

This is their old kit's recipe, but DSE upgrades stuff a lot, so some of this has changed... still, it'll get you where you wanna be for a home-brewed setup.

__________________
John
IG: @crawdaddycustoms
YouTube: https://www.youtube.com/channel/UCK9...Nc_lk1Q/videos
  #3  
Old 06-11-2020, 03:27 PM
twov8sandat4's Avatar
twov8sandat4 twov8sandat4 is offline
Senior Member
 
Join Date: Aug 2006
Location: Massachusets
Posts: 204
Default

Thanks for the information John.

I'll look closer at the DSE and the other setup you mentioned.

__________________
Panos
Little Miss G Racing
  #4  
Old 06-11-2020, 04:08 PM
FrankieT/A's Avatar
FrankieT/A FrankieT/A is offline
Ultimate Warrior
 
Join Date: Jun 2011
Location: USA
Posts: 2,556
Default

I use the aluminum M/C off a 1981 Trans Am. Last one I bought was from O'reilly's. It was new.
The front discs (12 inch) I use is off a third gen T/A. I use the S10 for the rear discs (11.5 inch).

__________________
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
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:06 AM.

 

About Us

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.

 




Copyright © 2017