1970 olds cutlass brake booster
#1
1970 olds cutlass brake booster
Hi
The brake booster in my cutlass is leaking, and I am planning on replacing it. I am wondering, is there a better alternative to the original 1970 design, such as later model brake boosters from the 80s that are longer and have a smaller diameter? Would they bolt in or is the setup completely different? I don't mind if it doesn't look original. Are there other aftermarket boosters that work better? I am pulling about 18 in of vacuum at idle if I remember correctly. Before the brake booster began leaking it worked adequately but I feel there is room for improvement.
Thanks for the input!
The brake booster in my cutlass is leaking, and I am planning on replacing it. I am wondering, is there a better alternative to the original 1970 design, such as later model brake boosters from the 80s that are longer and have a smaller diameter? Would they bolt in or is the setup completely different? I don't mind if it doesn't look original. Are there other aftermarket boosters that work better? I am pulling about 18 in of vacuum at idle if I remember correctly. Before the brake booster began leaking it worked adequately but I feel there is room for improvement.
Thanks for the input!
#2
The original booster might have been marginal for a long time. If you have it properly serviced and brought back to its original specifications, you will be quite surprised how well it will work. Do a search for Booster Dewey on these forums, and you will find the address. I have had a number of boosters repaired by him, and they are a great improvement over the old worn out booster. If you are having braking problems, it isn't the booster, but more likely the brake pads / shoes themselves. Personally, I hate the new lining material, since it increases the stopping distance, and it doesn't perform as well as the old lining material.
#4
Think about your booster choice by diaphragm surface area.
9" single booster surface area is (½·9)²·pi or, 4.5²·3.14 = 63.585 sq.in.
Dual 8" booster is (½·8)²·pi + (½·8)²·pi or 4²·3.14 x2 = 101.12 sq. in.
10" single booster would be 78.5sq. in.
11" single would be 94.985 sq. in.
http://www.chevelles.com/forums/show...80&postcount=2
9" single booster surface area is (½·9)²·pi or, 4.5²·3.14 = 63.585 sq.in.
Dual 8" booster is (½·8)²·pi + (½·8)²·pi or 4²·3.14 x2 = 101.12 sq. in.
10" single booster would be 78.5sq. in.
11" single would be 94.985 sq. in.
http://www.chevelles.com/forums/show...80&postcount=2
More surface area then an 11" for vacuum.
I put one in my 78 Camaro as well. IIRC I paid ~$90 for a new one from Rock Auto.
Last edited by Aceshigh; September 29th, 2011 at 08:10 AM.
#5
I found this thread:
https://classicoldsmobile.com/forums...-cylinder.html
I called that phone number during their business hours but it says its "unavailable"
I also found their website:
http://boosterdeweyexchange.com/
...Any Ideas?
https://classicoldsmobile.com/forums...-cylinder.html
I called that phone number during their business hours but it says its "unavailable"
I also found their website:
http://boosterdeweyexchange.com/
...Any Ideas?
#7
I was able to get ahold of them today. I had called a few times yesterday afternoon, I don't know why I couldn't get through.
I'm going to have the booster rebuilt - $115 plus $15 return shipping. They said it would take 3-4 days. It sounds great, I'll let you guys know how it goes. Thanks for the help!
I'm going to have the booster rebuilt - $115 plus $15 return shipping. They said it would take 3-4 days. It sounds great, I'll let you guys know how it goes. Thanks for the help!
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