brake vacuum low
Thread Starter
3rd Gear
Joined: Aug 2019
Posts: 3
Likes: 0
brake vacuum low
hi, an oversized cam has made my brake vacuum low so the car does not stop quickly. dangerous. the power brake booster is new. anything else that I can do? a hydro booster? not sure I want to do that. A larger booster? there's no room in that area of the engine. its a 1975 stingray.
Last edited by pav; Aug 15, 2019 at 06:53 PM.
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
hi, an oversized cam has made my brake vacuum low so the car does not stop quickly. dangerous. the power brake booster is new. anything else that I can do? a hydro booster? not sure I want to do that. A larger booster? there's no room in that area of the engine. its a 1975 stingray.
I went through a LOT of headache with mine. I had all Wilwood components and still felt like ****.
The way I see it there are 3 options, 2 of which I tried:
1. Add a vacuum pump. Pros - You still get power brakes. Con - Big, heavy, and loud as hell and still not consistent. Pump ~$200
2. Switch to manual brakes. I chose that route. I am fairly happy with them. Pros - Consistent and more room in engine bay. Cons - a bit more pressure required from your foot. Will require a probable change in master cyl and new brake lines going into the MC.
3. Hydroboost. Pros (that I know of) works really well from the reviews and still power assisted brakes. Cons - cost and complexity. Not sure about the cost.
There is a lot of info on here about the brakes and dealing with low vacuum but those are the 3 choices I have seen.
Your choice.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,221
Likes: 9,357
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
They make quiet pumps but they may be a bit more expensive but they are smaller too.
Heres one with good reviews
https://www.summitracing.com/parts/leb-vp001c/overview/
Theres a few in the car magazines like hotrod, etc,....
Heres one with good reviews
https://www.summitracing.com/parts/leb-vp001c/overview/
Theres a few in the car magazines like hotrod, etc,....
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
They make quiet pumps but they may be a bit more expensive but they are smaller too.
Heres one with good reviews
https://www.summitracing.com/parts/leb-vp001c/overview/
Theres a few in the car magazines like hotrod, etc,....
Heres one with good reviews
https://www.summitracing.com/parts/leb-vp001c/overview/
Theres a few in the car magazines like hotrod, etc,....
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,221
Likes: 9,357
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
They sell it without the chrome cover to make it smaller as well, or you can just remove the cover
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You can now buy ELECTRIC power brake kit...it requires NO VACUUM!! I don't know the cost, but this may be a more viable option.
http://www.abspowerbrake.com/ehpm.html
http://www.abspowerbrake.com/ehpm.html
