Dual Diaphragm Brake Booster 

The camshaft currently in the 433 only ends up with about 10.5-11 inches of vacuum. Just barely enough to run power brakes in my view and results in poor braking performance and feel. Part of improving the car's driveability is a move to a factory 80-81 Trans Am dual diaphragm brake booster as another Covid quarantine project. These are getting very hard to come by but I was able to find it on Rock Auto with a reasonable core charge.

On paper this should increase the pressure available at any given level of vacuum. It's questionable if it is going to be enough but there are some side benefits here. First, the diameter is smaller. The old 11" single diaphragm booster actually would contact the valve cover. This one is only 9" or so in diameter so there's that. Second, my old one had a few leaky master cylinders on it and needed to be replaced. Third, I am converting over to a C3 Corvette master cylinder to work with my rear disc so most of this stuff needed to come apart and custom lines made anyway as this booster positions the master in a slightly different location.

I am under no illusion this will completely solve the brake feel issues and may need a vacuum reservoir or pump to do that with the current cam but I am considering going back to my old cam which didn't create these problems and will likely work well with this booster.

Interesting for you

433 Build

433 Build

Restomod
I hope to now have the engine my car finally deserves. To make a long story short, I have had terrible luck with the current 455 based motor in...
Closer to Bare Metal

Closer to Bare Metal

Restomod
So the car is down to just body now. Dash & front-end are out. Once blasted, the body work can begin & then it's re-construction! Check out the...
Back from Engine Upgrades

Back from Engine Upgrades

Restomod
Well, I got Silverback home last Thursday night at 10pm and spent the entire day Friday getting him ready for Corvette Invasion in Austin on...
Day one!

Day one!

Restomod
First photo of this project! 73 Dodge Charger
Building My 2000 XJ

Building My 2000 XJ

Restomod
I bought my Jeep XJ in 2013 from a private seller. It was bone stock, and was just a commuter for his wife. I immediately started building it...
'55 Chevy 210 resto-mod

'55 Chevy 210 resto-mod

Restomod
My wife and I bought this '55 in 2007 from her parents who had purchased it in 1968 when they got married just after graduating high school. We...