C2 power brake booster?
10-26-2010, 08:41 PM
#1
Le Mans Master
Thread Starter
C2 power brake booster?
Will this unit fit the C2 properly, opinions?
Last edited by MiguelsC2; 10-26-2010 at 08:44 PM.
10-26-2010, 08:54 PM
#2
Looks correct to me. I just put in a Chrome Brake Booster Kit with Dual Master Cylinder in my '66. Ecklers part number 46848. And it fit and works great! It's so nice to have the dual master cylinder instead of my stock single master cylinder. Now if something should happen to one of my calipers, I'll still have brakes!
Power brake boosters like to have about 18" Hg or more for full utilization. With my high rise intake manifold, I only had 8 at the carb, which was the only outlet. So, I killed two birds with one stone by isolating my crankcase more with 2 pcv valves, one on each valve cover. Now I actually have a slight vacuum in the crankcase instead of having a breather pcv on one. This brought the vacuum up to 12, which gave me what feels like about double the braking power over the stock manual brakes. That also stopped my minor engine oil leaks at RPM's at about 7000.
Brandt
Power brake boosters like to have about 18" Hg or more for full utilization. With my high rise intake manifold, I only had 8 at the carb, which was the only outlet. So, I killed two birds with one stone by isolating my crankcase more with 2 pcv valves, one on each valve cover. Now I actually have a slight vacuum in the crankcase instead of having a breather pcv on one. This brought the vacuum up to 12, which gave me what feels like about double the braking power over the stock manual brakes. That also stopped my minor engine oil leaks at RPM's at about 7000.
Brandt
Last edited by bdhulderman; 10-26-2010 at 09:07 PM. Reason: clarification
10-26-2010, 09:31 PM
#5
Le Mans Master
Thread Starter
I think you are correct. I read some threads a while back. I think the conclusion was to shim the booster at the firewall for angle. But there is also a modified area on the brace on the hood underside.
I only pull 10 hg of vac. I don't think a booster is for me.
10-26-2010, 09:34 PM
#6
Like I said, you can pull it up to 12 or more, in your case maybe 14. You only need brakes after you let off the gas. That's when vacuum is greatest.
Last edited by bdhulderman; 10-26-2010 at 09:36 PM.
10-26-2010, 09:58 PM
#7
Le Mans Master
Thread Starter
10-26-2010, 10:12 PM
#8
Not a problem, I just had two holes, one in each, so I had to essentially shut one off by putting a pcv valve in it over a breather which can suck in air also. The bottom line, if you have no vaccum leaks and your pcv is working correctly, and that means only allowing air to pass in ONE direction -- outward only, then you should have as a minimum 12" Hg at idle throttle, which is plenty to feed your power brake booster with, well you'll have to find out, double the braking power of a stock manual brake system. Plus, if you still have a single channel master cyliner, then you are flirting with disaster if just one caliper or wheel cylinder fails.
Last edited by bdhulderman; 10-26-2010 at 10:22 PM.
10-28-2010, 02:28 PM
#9
Team Owner
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Location: Washington Michigan
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10-28-2010, 02:37 PM
#11
Le Mans Master
How do you modefy it on the underside? I still have not put the disc brakes front and rear on my car. All of the parts is ready to go on my car including 2 new complete trailing arms. Every part on the brakes will be brand new on my car.
Last edited by TheSaint; 10-28-2010 at 02:39 PM.
There was a Florida company on e-bay selling them for $99 shipped last year. I took a chance and am very happy with the looks, the fit and operation.
10-28-2010, 08:43 PM
#13
Le Mans Master
Thread Starter
10-29-2010, 12:21 AM
#14
Le Mans Master
10-29-2010, 01:36 AM
#15
Le Mans Master
Thread Starter
With a single master cyl, it will clear. I am wondering what mods if any are required for a dual master cyl PB set up. Can't find the old threads.
10-30-2010, 07:53 PM
#17
Clearance Issues
The one problem I had with putting in a dual master cylinder power brake booster was my valve covers which were tall -- didn't fit. Had to go with standard valve covers to clear the power brake booster.
Brandt
Brandt
02-28-2017, 06:41 PM
#18
Just got a dual master from Piratejack to convert my 64 with power brakes Its supposed to fit ,It hits the hood cant close Their telling my to use shims on the power booster which I didnt get in the kit !! Your not supposed to shim the booster it will throw the push rod out of alignment, iT could bind up then your in real trouble
02-28-2017, 06:47 PM
#19
Team Owner
Just got a dual master from Piratejack to convert my 64 with power brakes Its supposed to fit ,It hits the hood cant close Their telling my to use shims on the power booster which I didnt get in the kit !! Your not supposed to shim the booster it will throw the push rod out of alignment, iT could bind up then your in real trouble
https://www.corvetteforum.com/forums...post1593438254
02-28-2017, 07:17 PM
#20
63 only
In 63 the master cylinder for the power brakes is a different part number than the non-power unit. Also the power brake master cylinder uses a hex head bolt to secure the cap while the non-power unit uses a wing-nut head bolt. Again for hood clearance...
