[dcbusman]

My eBeetle ( 65 T1 ) has a delay in the brakes from when the pedal is depressed from what seems like the booster cutting in, my electric vac pump is putting out 25 hg so plenty of suck. It has a dual circuit m/c from a latter bus ( 24mm bore ) T3 drums on the rear and vented GM rotors on the front with floating calipers. Ive done all the math on hydraulic ratios and pedal leverage and ive got a 30: 1 overall pedal leverage ratio. The booster is the remote type that is mounted up front and the vac pump in the rear to keep the noise down.
The delay is only a split second but annoying.

 

[dcbusman]

No they're not spongy, the pedal feels good, its just the slight delay. I've bleed them multiple times, the booster doesn't have a bleed nipple so I've been cracking the line fittings while the system is under pressure. The rear drums are single leading shoe, Type 3 VW which have wider shoes than the Bug.
Yeah I might try moving the vac pump to the front or the booster to the rear so they're closer together and still keep the reserve reservoir. Something I didn't mention is because its a dual circuit system and my booster is designed for a single circuit system, i only have the booster plumbed into the front circuit, drums don't really need a booster as they're self energizing.

 

[dcbusman]

Its quite heavy now with the lead acid batteries, with the booster the brakes were only average, Im thinking of going to a smaller m/c to give a better hydraulic ratio and try it without the booster.

 

[dcbusman]

Its quite heavy now with the lead acid batteries, without the booster the brakes were only average, Im thinking of going to a smaller m/c to give a better hydraulic ratio and try it without the booster.

 

[dcbusman]

No they're not spongy, the pedal feels good, its just the slight delay. I've bleed them multiple times, the booster doesn't have a bleed nipple so I've been cracking the line fittings while the system is under pressure. The rear drums are single leading shoe, Type 3 VW which have wider shoes than the Bug.
Yeah I might try moving the vac pump to the front or the booster to the rear so they're closer together and still keep the reserve reservoir. Something I didn't mention is because its a dual circuit system and my booster is designed for a single circuit system, i only have the booster plumbed into the front circuit, drums don't really need a booster as they're self energizing.

I did mention here about the reserve reservoir, and yes i have a non return valve close to the booster