G Body Manual brake problem

Jeff Goss · 09-06-2011, 09:08 PM

I used a master cylinder for an 80-81 Trans Am for my 81 Malibu.

I can't remember exactly the reasoning, but the brakes held to well over 4500 on the footbrake, with a converter that stalled to 6100.

Hope this helps.

dahkahuna · 09-06-2011, 09:32 PM

Recently I did a conversion on a 66 chevy truck using a power brake booster, proportioning valve and dual master in a kit form based on a 69 camaro type unit. I spent hours trying to bleed the air out of the system using the old pump-it-up and hold the pedal pressure, then open the bleeder,without any sucess! Then I read the instructions on how to bleed that type system disc& drum and it said to open the closest bleeder and slowly push the pedal down to the floor and hold it , then close the bleeder. this centers the proportioning valve and lets the air move freely from the system. repeat the above directions paying attention to any air bubbles leaving each wheel, always check the fluid level to keep it full after each wheel is bled. Don'ty release the pedal till the bleeder is closed each time( remember no pumpin the brakes!

dahkahuna · 09-06-2011, 10:05 PM

By the way the front disc b leeder should be at the top of the caliper and you should be able to gravity bleed the front disc brakes with just pushing the pedal to start the flow they way I described. Hope this helps

Jody Lang · 09-06-2011, 11:12 PM

A big problem on these is when you remove the power brake can. The angle that the rod goes into the back of the master is off. Try to find an adapter plate that helps correct this angle.

I went with a Lamb unit. One great part of his is that the rod can't fall out of the back of the master.

Tommy Gaynor · 09-07-2011, 12:39 AM

Call Bruce Compton 208.362.3570. He has a few adapter plates and proper master cylinder kits ready to go.

greg fulk · 09-07-2011, 02:44 AM

Jody I have the same Lamb set-up but mine still feel "funky" staging? Do you run a 2-step? If so did it help? Mine feels like it wants to "slide in" when turning on the 2nd bulb.

NWDragracing · 09-07-2011, 09:14 AM

Check out these links for the manual brake conversion.

http://www.maliburacing.com/manualbrake_jim.htm

http://www.maliburacing.com/manual_brake_conversion.htm

http://www.maliburacing.com/manualbrake_pete.htm

http://www.hotrodders.com/forum/g-bo...ics-67017.html

09-06-2011, 09:08 PM	#1
Jeff Goss Member Join Date: Nov 2001 Location: Burlington, WA Posts: 361 Likes: 1 Liked 0 Times in 0 Posts	Re: G Body Manual brake problem I used a master cylinder for an 80-81 Trans Am for my 81 Malibu. I can't remember exactly the reasoning, but the brakes held to well over 4500 on the footbrake, with a converter that stalled to 6100. Hope this helps.

09-06-2011, 09:32 PM	#2
dahkahuna Member Join Date: Jul 2006 Location: san dimas , calif Posts: 128 Likes: 0 Liked 5 Times in 3 Posts	Re: G Body Manual brake problem Recently I did a conversion on a 66 chevy truck using a power brake booster, proportioning valve and dual master in a kit form based on a 69 camaro type unit. I spent hours trying to bleed the air out of the system using the old pump-it-up and hold the pedal pressure, then open the bleeder,without any sucess! Then I read the instructions on how to bleed that type system disc& drum and it said to open the closest bleeder and slowly push the pedal down to the floor and hold it , then close the bleeder. this centers the proportioning valve and lets the air move freely from the system. repeat the above directions paying attention to any air bubbles leaving each wheel, always check the fluid level to keep it full after each wheel is bled. Don'ty release the pedal till the bleeder is closed each time( remember no pumpin the brakes!

09-06-2011, 10:05 PM	#3
dahkahuna Member Join Date: Jul 2006 Location: san dimas , calif Posts: 128 Likes: 0 Liked 5 Times in 3 Posts	Re: G Body Manual brake problem By the way the front disc b leeder should be at the top of the caliper and you should be able to gravity bleed the front disc brakes with just pushing the pedal to start the flow they way I described. Hope this helps

09-06-2011, 11:12 PM	#4
Jody Lang Member Join Date: Mar 2002 Posts: 307 Likes: 28 Liked 92 Times in 29 Posts	Re: G Body Manual brake problem A big problem on these is when you remove the power brake can. The angle that the rod goes into the back of the master is off. Try to find an adapter plate that helps correct this angle. I went with a Lamb unit. One great part of his is that the rod can't fall out of the back of the master.

09-07-2011, 12:39 AM	#5
Tommy Gaynor Member Join Date: Aug 2002 Location: Vancouver WA Posts: 253 Likes: 2 Liked 5 Times in 3 Posts	Re: G Body Manual brake problem Call Bruce Compton 208.362.3570. He has a few adapter plates and proper master cylinder kits ready to go. __________________ "Go With Confidence"

09-07-2011, 02:44 AM	#6
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: G Body Manual brake problem Jody I have the same Lamb set-up but mine still feel "funky" staging? Do you run a 2-step? If so did it help? Mine feels like it wants to "slide in" when turning on the 2nd bulb. __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

09-07-2011, 09:14 AM	#7
NWDragracing Junior Member Join Date: Jan 2010 Posts: 40 Likes: 0 Liked 0 Times in 0 Posts	Re: G Body Manual brake problem Check out these links for the manual brake conversion. http://www.maliburacing.com/manualbrake_jim.htm http://www.maliburacing.com/manual_brake_conversion.htm http://www.maliburacing.com/manualbrake_pete.htm http://www.hotrodders.com/forum/g-bo...ics-67017.html