Now Theres Help For Rear Disk Or Drum Brake Lockup!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crazy4chevs · 02-07-2003, 05:56 PM

Look here. Cool

http://www.73-87.com/garage/lbs.htm

GMC Jim · 02-07-2003, 06:03 PM

can't seem to get the Yahoo link to work?????/

**Yukon Jack** · 02-07-2003, 06:05 PM

I think the link is actually

http://www.73-87.com/garage/lbs.htm

nate68 · 02-08-2003, 01:42 AM

get an adjustable proportioning valve from summit or wilwood for the rear and adjust it so that the back doesnt lock up before the front

crazy4chevs · 02-08-2003, 03:22 AM

What do you guys think? sounds good if you can keep more brake pressure to the rear and not lock the tires,loaded or not. Read how it says that the prop valve dosnt really work. it would be cool if it worked, just install inline and forget about it no adjustments to mess with. any body else like the sound of this?

with a prop valve you would need differnt pressure adjustments for a unloaded and loaded vehicle because of the weight differnce. not so with this acting like mechanical ABS, am i correct?

dmec · 02-08-2003, 04:20 AM

sounds good to me. sent for a catalog, want to know how much it cost.

jay6891 · 02-08-2003, 11:53 AM

Man I'm glad you put that on here. I have a disc rear end and have been worried that I was gonna have problems when I installed it. All this rear lock up talk. Thanks, I too have ordered the cat.

Locutus · 02-08-2003, 01:00 PM

You never want the front brakes to lock, under any condition. When your front brakes lock you lose the ability to steer. In order for your vehicle to turn your tires must have traction. If you don't have traction it doesn't matter what way you turn your wheels you will continue in the same direction you were headed. I race cars on dirt and asphalt and ask any racer they will tell you oversteer is far more favorable than understeer. With understeer it makes no difference how hard you try to turn in the corners you still hit the wall, with oversteer you can at least have a controlled slide thru the corner.

Mike

crazy4chevs · 02-08-2003, 05:20 PM

This dosnt cause the front to lock up it just takes the spike from the rears that causes them to lock up when weight transfer occures. the front stays stock and gives you more rear stopping power and takes some of the abuse off the front and makes the rear help out more without lockup.

nate68 · 02-09-2003, 10:59 PM

someone with 4whl discs buy it and see if there is a difference or not

Locutus · 02-09-2003, 11:50 PM

Here is a quote from thier web page: "It is preferable to have the front tires slip first (called understeer) when braking because the driver has more control." This is what I was refering to. As long as the rear wheels will still lock first you are ok but according to thier website this is not the case. Locked front wheels are very dangerous, and I know this from personal experience. At the tender age of 18 I was an inexperienced driver and I was not paying attention to the road ahead. There was a vehicle stopped ahead of me. My gut reaction was to steer to the left to the center turn lane and to slam on the brakes to keep from going into an intersection. I actually made it into the turn lane but my brakes locked from the excessive force I was applying to the pedal. When my front wheels locked I started to slide back to the right even though my wheels were turned to the left. I still hit the car because I could not steer with my front wheels locked. This is where ABS comes in it does not changes the proportioning it only prevents the wheels from locking so you maintain maximum control while achieving maximum stopping potentional. Be very wary of any product that affects that balance. I would consider an aftermarket ABS system first if it worries you that much.

Mixup · 02-11-2003, 12:04 PM

I have the Stewart LBS. It was about $80 when Stewart was selling it. It helped the rear locking up just a little but not enough. I'm going to an adjustable proportioning valve. I have disc front and drum rear. I got the kit from Master Power and have had trouble with the rear locking up since I put it in. The truck is apart now but when it goes back on the road I will try the adjustable valve.

02-07-2003, 05:56 PM	#1
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	Now Theres Help For Rear Disk Or Drum Brake Lockup!!!! Look here. Cool http://www.73-87.com/garage/lbs.htm __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington . Last edited by crazy4chevs; 02-07-2003 at 10:44 PM.

02-07-2003, 06:03 PM	#2
GMC Jim Senior Member Join Date: Dec 2002 Location: Portland, Oregon Posts: 901	can't seem to get the Yahoo link to work?????/ __________________ '71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal).

02-07-2003, 06:05 PM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	I think the link is actually http://www.73-87.com/garage/lbs.htm __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

02-08-2003, 01:42 AM	#4
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	get an adjustable proportioning valve from summit or wilwood for the rear and adjust it so that the back doesnt lock up before the front __________________ 68 short step, 406/700r4, 9" w/discs.

02-08-2003, 03:22 AM	#5
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	What do you guys think? sounds good if you can keep more brake pressure to the rear and not lock the tires,loaded or not. Read how it says that the prop valve dosnt really work. it would be cool if it worked, just install inline and forget about it no adjustments to mess with. any body else like the sound of this? with a prop valve you would need differnt pressure adjustments for a unloaded and loaded vehicle because of the weight differnce. not so with this acting like mechanical ABS, am i correct? __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington . Last edited by crazy4chevs; 02-08-2003 at 03:29 AM.

02-08-2003, 04:20 AM	#6
dmec Senior Member Join Date: Jun 2000 Location: yucaipa ca Posts: 580	sounds good to me. sent for a catalog, want to know how much it cost.

02-08-2003, 11:53 AM	#7
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Man I'm glad you put that on here. I have a disc rear end and have been worried that I was gonna have problems when I installed it. All this rear lock up talk. Thanks, I too have ordered the cat. __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit.

02-08-2003, 01:00 PM	#8
Locutus Registered User Join Date: Jan 2003 Location: Santa Fe, Texas Posts: 249	You never want the front brakes to lock, under any condition. When your front brakes lock you lose the ability to steer. In order for your vehicle to turn your tires must have traction. If you don't have traction it doesn't matter what way you turn your wheels you will continue in the same direction you were headed. I race cars on dirt and asphalt and ask any racer they will tell you oversteer is far more favorable than understeer. With understeer it makes no difference how hard you try to turn in the corners you still hit the wall, with oversteer you can at least have a controlled slide thru the corner. Mike

02-08-2003, 05:20 PM	#9
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	This dosnt cause the front to lock up it just takes the spike from the rears that causes them to lock up when weight transfer occures. the front stays stock and gives you more rear stopping power and takes some of the abuse off the front and makes the rear help out more without lockup. __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington .

02-09-2003, 10:59 PM	#10
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	someone with 4whl discs buy it and see if there is a difference or not __________________ 68 short step, 406/700r4, 9" w/discs.

02-09-2003, 11:50 PM	#11
Locutus Registered User Join Date: Jan 2003 Location: Santa Fe, Texas Posts: 249	Here is a quote from thier web page: "It is preferable to have the front tires slip first (called understeer) when braking because the driver has more control." This is what I was refering to. As long as the rear wheels will still lock first you are ok but according to thier website this is not the case. Locked front wheels are very dangerous, and I know this from personal experience. At the tender age of 18 I was an inexperienced driver and I was not paying attention to the road ahead. There was a vehicle stopped ahead of me. My gut reaction was to steer to the left to the center turn lane and to slam on the brakes to keep from going into an intersection. I actually made it into the turn lane but my brakes locked from the excessive force I was applying to the pedal. When my front wheels locked I started to slide back to the right even though my wheels were turned to the left. I still hit the car because I could not steer with my front wheels locked. This is where ABS comes in it does not changes the proportioning it only prevents the wheels from locking so you maintain maximum control while achieving maximum stopping potentional. Be very wary of any product that affects that balance. I would consider an aftermarket ABS system first if it worries you that much.

02-11-2003, 12:04 PM	#12
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	I have the Stewart LBS. It was about $80 when Stewart was selling it. It helped the rear locking up just a little but not enough. I'm going to an adjustable proportioning valve. I have disc front and drum rear. I got the kit from Master Power and have had trouble with the rear locking up since I put it in. The truck is apart now but when it goes back on the road I will try the adjustable valve. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350



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