Almost died today!
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
I thought brakes were designed to function independently....specifically, that the front and rear "circuits" were different pathways. The origin of the design was to provide partial braking to front or rear if/when the opposite section went bad.
IOW, I didn't think this scenario was likely to happen!
IOW, I didn't think this scenario was likely to happen!
How's the build goin' Gregg? I'm curious as to how much the mega porting will get you. I cut mine (SLPs) back ~ 2" and haven't felt any drastic SOTP differences as of yet.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Within the master cylinder there is a pressure differential valve between the 2 "independant" front and rear "circuits" for the different pathways. Basically this valve has seals on each end between these pathways. When the seals give out or cylinder walls are imperfect fluid can move between the two F & R pathways.
How's the build goin' Gregg? I'm curious as to how much the mega porting will get you. I cut mine (SLPs) back ~ 2" and haven't felt any drastic SOTP differences as of yet.
How's the build goin' Gregg? I'm curious as to how much the mega porting will get you. I cut mine (SLPs) back ~ 2" and haven't felt any drastic SOTP differences as of yet.
The build is taking a last-minute detour. I'll update you via PM if you like. (Basically, I'm looking more at the HSR/383 combo now.)
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Heel & Toe
Joined: Aug 2009
Posts: 18
Likes: 0
From: Fort Hood TX
I had a similar issue with my 1990, although not as exciting. I turned her on after getting gas and my pedal sank to the floor. If I pumped the pedal a few times, it was fine for a few seconds before sinking right back down. I rolled through the parking lot (slowly) and even though the pedal was going to the floor I was still getting a decent amount of stopping power.
After pumping the pedal back up a few times, suddenly the problem disappeared. Both brake fluid reservoirs were full and I couldnt spot any leaks so I took some back roads home and there wasnt any noticeable change in brake power. However after I made it home I could hear a nasty creaking noise coming from the rear left brake if I pushed the pedal in. Two days later after a wash I noticed brake dust was not accumulating on the rear left or front right wheel. She has sat very still since then. Any suggestions?
After pumping the pedal back up a few times, suddenly the problem disappeared. Both brake fluid reservoirs were full and I couldnt spot any leaks so I took some back roads home and there wasnt any noticeable change in brake power. However after I made it home I could hear a nasty creaking noise coming from the rear left brake if I pushed the pedal in. Two days later after a wash I noticed brake dust was not accumulating on the rear left or front right wheel. She has sat very still since then. Any suggestions?
Pro
Joined: Jun 2001
Posts: 520
Likes: 6
From: Elverson PA
That happened to me in my '79 Monza when I was really young. Thank God the e-brake worked, or I would have been dead or very hurt. I was coming up on a red light at a four lane highway, and no brakes at all. I pulled the e-brake and slid to a stop right only feet from being t-boned at 60 mph.
I was delivering pizza at the time. When I got back to the pizza place using the e-brake (only 2 blocks away), I told them I wouldn't be able to work the next day as I needed to fix my master cylinder. They fired me! Thanks Ice House Deli, Pottstown, PA. Oh well, I was better off anyway.
I was delivering pizza at the time. When I got back to the pizza place using the e-brake (only 2 blocks away), I told them I wouldn't be able to work the next day as I needed to fix my master cylinder. They fired me! Thanks Ice House Deli, Pottstown, PA. Oh well, I was better off anyway.
Drifting
Joined: Feb 2006
Posts: 1,263
Likes: 0
From: CV ca
St. Jude Donor '11-'12-'13
FYI....If you ever need to use the E-brake again, try and hold the button in so you can try and maintain some sort of control over the braking, just in case this unexpected emergency lands you in a spot where you need to get back off the brakes and get back on the gas to avoid another oncoming problem that's bearing down on you. Sure, there's not much time to think/react, but even less time for the other drivers, who unlike corvette "pilots", aren't even thinking about driving as they're blowing down the road without a clue. By the time some of these idiots even notice there is a situation going down(if they even do) it's over, one way or another. 
Pro
Joined: May 2007
Posts: 638
Likes: 1
From: Robesonia Pa
I thought brakes were designed to function independently....specifically, that the front and rear "circuits" were different pathways. The origin of the design was to provide partial braking to front or rear if/when the opposite section went bad.
IOW, I didn't think this scenario was likely to happen!
IOW, I didn't think this scenario was likely to happen!
I also could build up a softer pedal - I limped home that way.
