Want to use a smaller power brake booster

[lenguini]

Greetings all,wanting to use a smaller diameter brake booster/master combo in my 65 c10build.
Using an 81 half ton disc front end with its matching calipers, 10" brake booster,master cylinder and proportioning valve. At the back using a 1972 307 rearend with drums.

What do I need to get there ?


All help with a solution will be much appreciated.

Thankyou in advance.

[markeb01]

If it’s in your budget, Master Power Brakes offers both a 9” booster and an 8” dual diaphragm booster. I’m running the 9” and it works fine, but the 8” would generate even more power if you prefer a softer pedal. While the 8” is smaller around, it also takes up a lot more space lengthwise.

http://www.mpbrakes.com/products/pro...product_id=194

http://www.mpbrakes.com/products/pro...product_id=631

[gimmy 64]

i used the stock booster that came with my 64 gmc. you can still get them from autozone or else where.

[lenguini]

Today I have Been looking at a 7"dual diaphram booster from speedway,whats your thought ?

[64shortbox]

Personally I like Speedway, good prices. You also might be able to use a dual diaphragm booster from a Chevy mini van I think thay are 9" but the mounting studs are metric and you would need to run a 3/8" - 24 die down the pushrod of the booster. The Speedway unit would be a direct bolt in.

Don't forget about these:
They would make your life a LOT easier:

http://www.speedwaymotors.com/Univer...Heim,9329.html

http://www.speedwaymotors.com/Remova...ose,45896.html

http://www.speedwaymotors.com/GM-Cor...ore,51673.html

What can I say - I'm cheap and lazy.

[samuellg1977]

Lenguini,
I hope you don't mind, but i think this crew may be able to help me also. My Q: Why does my brake booster make a loud "sucking" sound until I press the brake pedal? Thanks. Sorry, I didn't mean to hijack the thread.

[Captainfab]

Member towersddg9 just posted a couple pics of his CPP booster and master combo, mounted with my booster bracket here......

http://www.67-72chevytrucks.com/vboa...80#post4971880

I don't know what diameter the booster is though....looks pretty small.

[lenguini]

Thanks for the pics Cap,appreciate it.

Ed.

[summerj]

What is the pupose of the booster Bracket that goes between the firewall and the booster? Is it a neccessity?

[HEI451]

That bracket bolts to the firewall, and the booster bolts to it, as the stock firewall doesn't have a hole/bolt pattern to mount the booster directly to the firewall. Also makes it so you can mount the booster without hacking/cutting/drilling the firewall.

[64shortbox]

Yes that bracket is necessary. All of Captainfab's items are top notch. I bought his power brake booster bracket and it is a perfect fit, it comes notched to clear the steering column bracket. It actually looks even nicer in person than it does in his pictures. I spent the extra and bought his powder coated upgrade. An absolute beautiful piece.

I used Captainfab's Power Brake Booster bracket

Booster is from a 92 Full size Chevy truck (I threaded the push rod 3/8 - 24)

Vacuum check valve & molded hose came from a mid 70's Dodge full size truck

Manifold vacuum T came from an 80's Ford Ranger 4 cyl (I needed multi ports)

Master is from a 67 Caddy (I split the system front to back but still haven't done the Disc brake up grade but I'm working on it)

[Captainfab]

Thanks for the compliment and the pics 64shortbox, and also to HEI451 for the explination

[Harley1650]

I use a 7" dual diapraphm booster with a big block. Works great

[66farmer]

Harley what buster did you use and do you have a cam in that BBC I'm asking because I have a big block with low vacume cam.
Thanks

[mbgmike]

We have the 8Inch dual diaphrams on closeout for 45.00 each plus shipping. first come first serve

[RoyL]

Originally Posted by mbgmike

We have the 8Inch dual diaphrams on closeout for 45.00 each plus shipping. first come first serve

don't see these on your website, all gone?

[mbgmike]

Originally Posted by RoyL

don't see these on your website, all gone?

nope. we have over 30 in stock. thanks I checked the website and your right they aren't there. I will add them. here is pic. Can't beat the price.

[Harley1650]

Farmer, My 454 has a little cam but not much so vaccum isnt an issue. When I was checking into the brakes I figured out 8" would work fine with the tall valve covers. I bought a booster, master cylinder, bracket and proportioning valve in a "kit" for @ $225. MbgMike sounds like a great deal if thats all you need

[RustyDan]

Hey Dudes.
I may be out of step here...but I need a little help.
My '72 developed a vac leak at the rear of the brake booster, has the big hose from the back of my carb feeding only that. I Was getting decent(?) mileage untill this happened.
My Question is likely moot, But I'm gotta try anyway...
"Are the Brake Boosters rebuildable"? or am I chokin on hydocarbo's and it's "replacement only". I have rebuilt just about everything else already so what the hey? Thats why we love em so much ... Right? let me know what you think

[mbgmike]

Originally Posted by RustyDan

Hey Dudes.
I may be out of step here...but I need a little help.
My '72 developed a vac leak at the rear of the brake booster, has the big hose from the back of my carb feeding only that. I Was getting decent(?) mileage untill this happened.
My Question is likely moot, But I'm gotta try anyway...
"Are the Brake Boosters rebuildable"? or am I chokin on hydocarbo's and it's "replacement only". I have rebuilt just about everything else already so what the hey? Thats why we love em so much ... Right? let me know what you think

While the booster are rebuildable you need to have the correct tools to dismantle them. Cheaper just to replace unless you want to invest the money for tools