rdmypny

my buddy has pulled his stock 5.0 out and installed a blue printed and balanced 347. he also installed a super charger (powerdyne). well now he has no brakes because they run off vaccum. any sujestions?

.boB

There are two choices.

1. Install a vacuum pump. They sues to be standard equipemtn on vehicles like diesel GM cars. You can buy them aftermarket from companies like SSBC. Also check with the street rod catalogs, you often find them there.

2. Manual brakes. This is a little more involved, and maybe more expensive. Start by changing the MC. I like the CMC dual cylinders. They seem to give much better braking power than a stock type manual MC. If you want stock type, look for a Jeep 7/8" bore. Use the combination valve to match the MC.

If you go this route, you MUST modify the brake pedal, or find a stock manual pedal. Stock PB pedals have a ratio around 5:1. Manuals have a ratio around 7:1. If you don't make the change, you won't be able to make enough force to actuate the brakes well.

The hole is already in the pedal box for the manual pedal. All you need to do is cut and weld the brake pedal the same distance you move the upper mounting point. As long as you're at it, might as well use an adjustable push rod.

projectresto83

Does he have a single plane or dual plane intake? Dual's run a little better vac. But like said above a vac pump is expensive but they work. How much vac is he pulling at idle????

rdmypny

i am not sure i know the intake is the trick flow race series but don't know how much vac he is pulling. on the vac pump were do you install it?

projectresto83

you can mount it anywhere but hook it up how the instructions say.

.boB

Since he has a blower, ther is no manifold vacuum. Hence, the question.

A vacuum pump is just an electric air pump. Just like an air compressor, except you hook up to the intake, not the exhaust. It can be mounted anywhere. The trunk is probably the best place for the pump, but it might be a little noisy there. Place a 2 qt vacuum resevoir between the pump and the booster, and you'll always have a steady and stable supply of vacuum.

rdmypny

ok i was wondering about the mount location cause i was under the impression it was belt driven. but that sounds good ill get with him and let him know! thanx