Brake booster upgrade
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Joined: Jun 2003
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From: Santo Domingo DR
Brake booster upgrade
Hi Guys,
I'm in the middle of the restoration of my 68 427 convertible.
Originally the car didn't have any power brakes, but since a frame off restoration was in process, I decided to upgrade the whole brake system.
New stainless steel brake lines for Power brakes were installed, ferro carbon pads, power slot rotors, etc.
Anyway, I ordered a 9 inch power booster, which fits leaving a gap of less than half an inch between the aluminium valve cover and the booster.
I have to drill 4 new holes in order to hold the new booster to the firewall, which is no problem, but I'm wondering now, did I receive a booster for a newer model and not the 68; what do you think?
Now, the next questions:
Originally with out Power Brakes, there is a shaft connected from the brake pedal guided directly and only pushing the brake pump.
On the new booster, there is a shaft with a thread comming out of the booster. Does anyone know what part number the new connecting shaft between booster and pedal has, or where I can order this part?
I couldn't find it neither at Ecklers nor Corvette Central.
Thanks
Dan
I'm in the middle of the restoration of my 68 427 convertible.
Originally the car didn't have any power brakes, but since a frame off restoration was in process, I decided to upgrade the whole brake system.
New stainless steel brake lines for Power brakes were installed, ferro carbon pads, power slot rotors, etc.
Anyway, I ordered a 9 inch power booster, which fits leaving a gap of less than half an inch between the aluminium valve cover and the booster.
I have to drill 4 new holes in order to hold the new booster to the firewall, which is no problem, but I'm wondering now, did I receive a booster for a newer model and not the 68; what do you think?
Now, the next questions:
Originally with out Power Brakes, there is a shaft connected from the brake pedal guided directly and only pushing the brake pump.
On the new booster, there is a shaft with a thread comming out of the booster. Does anyone know what part number the new connecting shaft between booster and pedal has, or where I can order this part?
I couldn't find it neither at Ecklers nor Corvette Central.
Thanks
Dan
Melting Slicks
Joined: May 2001
Posts: 2,812
Likes: 4
From: Gig Harbor Wa
You should not have to drill any mounting holes. You will have to drill the hole for the pushrod. The top two holes for the power booster are the same as the ones for the manual master. The bottom holes are in your firewall and have bolts in them now.
The threaded rod coming out of the booster has a clevis that threads onto it that attaches to the pedal lower than your manual rod connects. This hole in the pedal is already there as well.
The threaded rod coming out of the booster has a clevis that threads onto it that attaches to the pedal lower than your manual rod connects. This hole in the pedal is already there as well.
Thread Starter
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Joined: Jun 2003
Posts: 74
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From: Santo Domingo DR
Thanks for the fast reply. I'll check on to that tomorrow. I remember only on sunday looking at the two bolts comming out of the firewall and thinking, damn, this doesn't fit! I'm fealing better now!
Regards,
Dan
Regards,
Dan
Race Director
Joined: Jun 2000
Posts: 10,042
Likes: 673
From: FL
There is very little clearance between BB valve covers and a vacuum power brake booster.
A nice option is the Hydroboost setup. Hydraulic boost using PS pump pressure. http://www.hydroboost.com/ Saw on installed on '70 with a 454. Very nice, plenty of clearance.
A nice option is the Hydroboost setup. Hydraulic boost using PS pump pressure. http://www.hydroboost.com/ Saw on installed on '70 with a 454. Very nice, plenty of clearance.
