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art leong · 02-19-2011, 10:42 PM

I recently changed the brake ratio on my car It has stock 4 wheel discs. With the power booster removed. Kept the stock mastercylinder.
The original ratio was less than 4 to 1, I changed it to 6 to 1.
I now have 1000 pounds of pressure on the drive wheels (had 600 before) While applying fairly hard pedal pressure.
With the car off I have a hard pedal. But when I start it up and put it in gear. The pedal gets spongy, and slowly sinks.
I've bleed the brakes 3 times and have no air coming out. I didn't disconect the brake lines from the master. I did take out the bleeder valve to install gauge to check pressure.
I can't figure why this is only happening in gear?

BTW the car in on jack stands not on the ground.

02-19-2011, 10:42 PM	#1
art leong VIP Member Join Date: Dec 2001 Location: Richmond Hill, Georgia Posts: 2,003 Likes: 0 Liked 1 Time in 1 Post	Brake problems? I recently changed the brake ratio on my car It has stock 4 wheel discs. With the power booster removed. Kept the stock mastercylinder. The original ratio was less than 4 to 1, I changed it to 6 to 1. I now have 1000 pounds of pressure on the drive wheels (had 600 before) While applying fairly hard pedal pressure. With the car off I have a hard pedal. But when I start it up and put it in gear. The pedal gets spongy, and slowly sinks. I've bleed the brakes 3 times and have no air coming out. I didn't disconect the brake lines from the master. I did take out the bleeder valve to install gauge to check pressure. I can't figure why this is only happening in gear? BTW the car in on jack stands not on the ground. __________________ Art Leong 2095 SS