disc brake issues ?

[madcarson]

I converted to disc/disc from drum/drum on my 69 camaro;I have SSBC up front and CPP in rear(caddy like) with 11" booster and aux.can Intake feeds to can then to booster and pedal is like a rock to push and brakes suck (UNSAFE) Master cyl. is 1-1/8" I only have about 10" vac.@ idle but I thought with can it would work ?

[JRouche]

10" of vacuum is too low, specially with a 1-1/8" bore MC. Its like you were running that MC on a non-powered system. Must be one hella cam. I am running an RPM performer and Im into the 14-16" of vacuum. I also have a nice big cadillac booster. JR

[Apogee]

Accumulators do nothing to increase your vacuum levels as that's a function of your engine's camshaft. The purpose of an accumulator is to increase the volume of vaccum "reserve" within the system to aid in repeated applications and to capture vacuum when it's available from the engine. Because your engine makes 10" vac at idle, that's the best case scenario as it's typically only going to make less at more open throttle positions.

It may not make any real difference, but you do have a vacuum check valve on your accumulator, right? Short of an electric vacuum pump, your system should be either manual or hydro IMO.

Tobin
KORE3

[NOGO]

I converted to disc/disc from drum/drum on my 69 camaro;I have SSBC up front and CPP in rear(caddy like) with 11" booster and aux.can Intake feeds to can then to booster and pedal is like a rock to push and brakes suck (UNSAFE) Master cyl. is 1-1/8" I only have about 10" vac.@ idle but I thought with can it would work ?

The SSBC front "drop in" calipers have less piston area on both pistons than the stock single piston. This combined with your 1 1/8" MC bore and low vacuum assist will increse your pedal effort beyond what you need to brake safely. I ran the SSBC calipers and was never happy with the brake performance. The aluminum caliper decreased the unsprung weight a bit, but the braking was worse than stock replacement parts. I would return them...