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Here are some good tips and insight to clutch bleeding with a pressure bleeder.
-The area in the brake fluid reservoir, for the clutch, is small and partitioned. ie, the fluid for the clutch circuit is small and will empty quickly during flushing, unless a head of FLUID pressure is used via the power bleeder.
-depressing the clutch pedal to the floor will open the curcuit and fluid will flow FAST. ...(yet the reservoir will still show 3/4 full because you are looking at the level markings for the brakes partition)
.....So fast that the curcuit will empty and pull air, if you are being cute and using your power bleeder for just air pressure (not filling it with fluid, as some people do for brake bleeding).
If you follow the Porsche service manual procedure and open the bleeder for the slave cylinder and gently push the clutch pedal to the floor, 32oz. of fluid will flow in just over a minute.
This could be why people are have trouble with proceed, its using more fluid than they expect.
unless you are bleeding a new install, just bleed the clutch without depressing the pedal. It still flows fast and you need Fluid pressure from your power bleeder and plenty of fluid.
If you ever get into a bind and vacuum the clutch pedal to the floor and it wont come back up,
you can actually backfill the clutch curcuit from a brake caliper. Attach a length of bleed hose from your left rear brake caliper bleeder to the clutch slave bleeder. Open slave bleeder then the caliper bleeder and start gently pumping the brake pedal. This will backfill the system and raise the clutch pedal. you can do this as long as you want, its a closed cucuit sending air and fuild right back to the reservoir. So should have the reservoir cap off. Its genius and it works.
For a front wheel drive car with clutch bleeder up front, use the front left brake caliper.
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