brake booster

[rsorg]

hi , i am thinking of having brake boosters do my restoration on my booster has anyone here used them there address is ,san luis obispo cal. thanks roger

[Chevy Dave]

I have used Power Brake Booster Exchange, located in Lynwood, WA. They did good work for me several years ago when they were located in Portland, OR. The original owner retired and it was taken over by a new guy in Washington.

[jft69z]

8 hours ago, rsorg said:

hi , i am thinking of having brake boosters do my restoration on my booster has anyone here used them there address is ,san luis obispo cal. thanks roger

Yes,  They did mine. Every part of the deal was top notch, you won't be disappointed. 

[TheBMan]

@rsorg Is there a benefit to restoring your current booster rather than purchasing a replacement? There are restoration-correct replacements available in the aftermarket. They have the correct gold-colored finish and 'delco moraine' stamping.

[jft69z]

1 hour ago, TheBMan said:

@rsorg Is there a benefit to restoring your current booster rather than purchasing a replacement? There are restoration-correct replacements available in the aftermarket. They have the correct gold-colored finish and 'delco moraine' stamping.

There IS a difference. Most of the aftermarket boosters are made offshore, even though they have the Delco stamp.. I'll add a link here on how to ID them, but suffice to say, Mike at Brakeboosters.com will not go anywhere near those things. You can either send yours to them, or they'll provide you with a genuine Gm booster.

After reading the below info, every time you see a booster at a show, you'll immediately spot a repro booster by the sharp, triangle shaped stamping on the face of the booster. 😁

Scroll about half way down the page:

https://www.brakeboosters.com/brake-boosters-history

[Dtret]

If you are restoring you want as many “ correct parts “ as possible. Most times it’s more expensive but it is correct for the car. Some of the aftermarket parts are not as good as the original ones, so that’s always a thought too. 

[rsorg]

i have decided to go with brakeboosters ,he is going to restore my original booster thanks,roger

[Jeff Dodson]

Is there a replacement booster that will level out the master cylinder.  The angle it sits at SUCKS. You can only fill it like halfway 

[jft69z]

33 minutes ago, Jeff Dodson said:

Is there a replacement booster that will level out the master cylinder.  The angle it sits at SUCKS. You can only fill it like halfway 

I'm sure there are alternate boosters out there.

But...General Motors put that style on millions of vehicles with no issues, they apparently didn't see it as a problem. Just a thought.

[Scott S.]

2 hours ago, jft69z said:

I'm sure there are alternate boosters out there.

But...General Motors put that style on millions of vehicles with no issues, they apparently didn't see it as a problem. Just a thought.

I'm thinking the rod assembly geometry has something to do with the angle.

Mid eighties "G" bodies tanks sat more level, but the linkage is different.

[Marks71]

26 minutes ago, Scott S. said:

I'm thinking the rod assembly geometry has something to do with the angle.

Mid eighties "G" bodies tanks sat more level, but the linkage is different.

That’s what I’ve heard also. Non PB cars had the pushrod attached higher up the pedal arm (closer to the pivot point) to create a higher pedal ratio to the MC. PBs did not require such a high ratio due to the help of the booster, so the pushrod is mounted lower on the pedal arm which changes the geometry between the pushrod and the booster. Another reason had to do with bleeding air bubbles from the MC. Not totally convinced about that one though.

[Scott S.]

So would swapping in the non power brake pedal allow one to change the way a power booster is mounted ??? 

Or would you have to re angle the mounting bracket as well ?

[jft69z]

14 minutes ago, Scott S. said:

So would swapping in the non power brake pedal allow one to change the way a power booster is mounted ??? 

Or would you have to re angle the mounting bracket as well ?

It's all about the leverage.

Again, why is this even an issue?

[Scott S.]

Because Jeff doesn't like it when the brake fluid spills out the back of the master cylinder. 

[Blackhawk]

41 minutes ago, Scott S. said:

So would swapping in the non power brake pedal allow one to change the way a power booster is mounted ??? 

Or would you have to re angle the mounting bracket as well ?

Should be the same pedal, just a different hole. The bracket for the booster would need to be modified to change the angle, and you would probably want to go to a master cylinder with a slightly smaller bore (between manual and power, something like 1") to get similar pressure when compared to stock.

[Scott S.]

11 minutes ago, Blackhawk said:

Should be the same pedal, just a different hole. The bracket for the booster would need to be modified to change the angle, and you would probably want to go to a master cylinder with a slightly smaller bore (between manual and power, something like 1") to get similar pressure when compared to stock.

👍

[jft69z]

I'm still having a hard time wondering how the entire GM Engineering staff, the R&D team, the countless hours of road testing, and the millions (billions?) of miles driven in all the vehicles on the road, got it wrong.

Guessing about drilling holes in the brake pedal, and guessing at a master cylinder bore size, doesn't seem very scientific. If they thought the car could get by with manual brakes, they would have offered it. Just a thought...

[Jeff Dodson]

1 hour ago, Scott S. said:

Because Jeff doesn't like it when the brake fluid spills out the back of the master cylinder. 

Or maybe because Jeff doesn't like the way it looks at such an angle 

[jft69z]

15 minutes ago, Jeff Dodson said:

Or maybe because Jeff doesn't like the way it looks at such an angle 

Might be worth looking into that electric brake booster system we were talking about a week or two ago here. It would be interesting to have real world experience to see if it worked good.

 

https://www.firstgenmc.com/forums/index.php?/topic/33565-electric-power-brake-booster-w-master-cylinder/#comment-286125

 

[Jeff Dodson]

3 hours ago, jft69z said:

Might be worth looking into that electric brake booster system we were talking about a week or two ago here. It would be interesting to have real world experience to see if it worked good.

 

https://www.firstgenmc.com/forums/index.php?/topic/33565-electric-power-brake-booster-w-master-cylinder/#comment-286125

 

1500.00 .... 😳, I'm starting to like the slanted master cylinder 🤣

[Scott S.]

20 hours ago, jft69z said:

Might be worth looking into that electric brake booster system we were talking about a week or two ago here. It would be interesting to have real world experience to see if it worked good.

 

https://www.firstgenmc.com/forums/index.php?/topic/33565-electric-power-brake-booster-w-master-cylinder/#comment-286125

 

My '86 T-Type had the electric brake system... (turbo engines don't produce enough vacuum) and for a factory set up it worked great.

As long as it was working. The pump impellers were notorious for wearing out and there wasn't a rebuild kit available for it back then, so it had to be replaced as a complete unit.

Any trip to the wreckers meant keeping a look out for parts, but I finally took one apart and built my own impeller. Should have patented that idea.  

Now a days, the tech has improved quite a bit, and if one is using a fairly tall cam, they would probably be a good idea for low vacuum idling.