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Username Post: Brakes upgrade        (Topic#358919)
CowboyTrukr 
"10th Year" Silver Supporting Member
Posts: 4482
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
11-23-19 10:54 PM - Post#2780845    

Put this on last weekend. What a difference. Totally new feel and solid pedal.

RAYBESTOS MC390541
2002 Tahoe Master Cylinder with BLF-26C 9/16” - 1/2” adapter.






Attachment: A2576506-2B2E-4412-975C-2AB43935D600.jpeg (2.16 MB) 27 View(s)




Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
scrambldcj8 
"2nd Year" Silver Supporting Member
Posts: 2592
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
11-24-19 06:37 AM - Post#2780855    
    In response to CowboyTrukr

Good info! (I'll assume this was put on your '95 K1500?).

I am planning to "upgrade" my '94 K Blazer's brake this summer. I have a SF rear w/larger drum brakes already but want to do the 1T front calipers. This might be a nice MC for that combo?

Any issues with the reach of the lines, or do they line right up and just need the adapter fitting? It appears to line right up in the pic....



 
CowboyTrukr 
"10th Year" Silver Supporting Member
Posts: 4482
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
11-24-19 08:58 AM - Post#2780860    
    In response to scrambldcj8

Sorry, Cj, yes. My 95.

Easy bolt up. The only small challenge, and it really wasn’t bad, was to uncoil the lines just a bit to make sure they were square with the casting. Otherwise, very easy. I would think that this will make your rig very safe once you get it all set up. It’s such a difference. Zero fade, solid feel. It’s gonna take a little getting used to because it did shorten the stopping distance a bit.

For the novice wrench heads reading this, you must bench bleed the master cylinder before you install it. You will drop a little brake fluid just trying to do the swap. Be careful. Brake fluid is very caustic to painted surfaces. Finally, make sure to bleed your lines to each wheel to make sure there is no trapped air. Start at passenger rear, then driver rear, then passenger front, and finally driver front.

Also, the unused socket between the reservoirs is for a sensor that the ‘99 and up trucks have that the GMT400’s don’t.

Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


Edited by CowboyTrukr on 11-24-19 09:13 AM. Reason for edit: No reason given.

 
johnboy1022 
Newbie
Posts: 47
johnboy1022
Reg: 08-14-15
12-18-19 03:51 PM - Post#2782424    
    In response to CowboyTrukr

Do you have more solid braking with this? I have a 1990 c1500 and the brakes seem to take forever to stop the truck.



 
CowboyTrukr 
"10th Year" Silver Supporting Member
Posts: 4482
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
12-18-19 03:57 PM - Post#2782426    
    In response to johnboy1022

OMG, yes!

It’s worth the ~$100. So easy to do. Takes a while to get the MC bench bled, but installing it is so easy. That Benjamin covers the MC, adapter and a quart of DOT3.

Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
johnboy1022 
Newbie
Posts: 47
johnboy1022
Reg: 08-14-15
12-18-19 05:41 PM - Post#2782437    
    In response to CowboyTrukr

Thank you for posting this. I was actually coming here today to look for some advice on the braking because I almost rear ended someone that slammed on their brakes.



 
baswm 
"2nd Year" Silver Supporting Member
Posts: 113
baswm
Loc: maryland
Reg: 12-22-03
01-14-20 04:52 AM - Post#2784367    
    In response to johnboy1022

I thank you for posting this as well. My pedal on the 97 GMC suburban has always been soft and takes longer that I want to stop. I will look at swapping out my master cylinder with this one. I always thought it was something bad with the ABS system for the spongy feel.

Bill
1966 Chevrolet Impala convertible
1997 GMC Suburban K1500 4x4
2001 Chrysler Town and Country
2007 Dodge Charger R/T


 
scrambldcj8 
"2nd Year" Silver Supporting Member
Posts: 2592
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
01-14-20 05:21 AM - Post#2784369    
    In response to johnboy1022

  • johnboy1022 Said:
look for some advice on the braking because I almost rear ended someone that slammed on their brakes.




The MC swap won't prevent you from rear ending someone when you're following to close.....just had to mention that...LOL



 
mauryfrench 
“2nd Year” Gold Supporting Member
Posts: 40
mauryfrench
Loc: Wylie, TX
Reg: 12-26-19
01-18-20 07:29 PM - Post#2784615    
    In response to scrambldcj8

So, are you guys saying this RAYBESTOS MC390541 Master Cylinder style is better than replacing with an OEM Master Cylinder?

Maury French
Wylie, TX
1998 Chevy ECLB 5.7 Vortec


 
CowboyTrukr 
"10th Year" Silver Supporting Member
Posts: 4482
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
01-19-20 12:16 AM - Post#2784634    
    In response to mauryfrench

If you want to go with a Delco, great. Just go with one from an ‘02 Tahoe. Way better response.

Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
djackson210 
Poster
Posts: 87

Age: 37
Loc: San Antonio, Texas
Reg: 01-31-19
02-12-20 08:24 AM - Post#2786355    
    In response to CowboyTrukr

Can I safely ASSume that this would apply to a '00 C2500 as well?

'91 Chevy C1500 SC LWB
'00 Chevy C2500 CC SWB


 
1983G20Van 
Super Senior Member
Posts: 3827

Loc: Bedford, Texas, USA
Reg: 11-13-02
02-12-20 10:19 AM - Post#2786364    
    In response to djackson210

The NBS master cylinder has a larger piston. You will actually lose braking power over the stock master cylinder.

Want good stopping power...Use a newer hydroboost master cylinder and convert to hydroboost.

My 1997 Express van has the master cylinder and hydroboost booster from a 2003 van on it.

When I still had the 1/2 ton suspension and brakes I upgraded the front calipers and pads to the same 8800 gvw single rear wheel units used on the police package and tahoe limiteds. Express van would stop on a dime even running 85+ mph. Much stronger braking. It would kick the ABS in at 70 mph on dry pavement.

Upgrade to stainless hoses and dot 5.1 brake fluid at the same time. No pedal fade and instant brake activation.

1983 G20 Van, 350 TPI, Ported 906 Vortecs, Edelbrock 3817 Base, ASM oversize runners. Reed Custom Roller cam, 700r4, 12 bolt with 3.08 gears, Doug Thorley Tri-Y headers, true duals


Edited by 1983G20Van on 02-12-20 10:22 AM. Reason for edit: No reason given.

 
1983G20Van 
Super Senior Member
Posts: 3827

Loc: Bedford, Texas, USA
Reg: 11-13-02
02-12-20 10:31 AM - Post#2786366    
    In response to 1983G20Van

Another tip I have for the 2wd 8-lug guys. The 2001 & 2002 3500 vans had a larger caliper piston and thicker front rotor. Same caliper and rotor thickness as the dual rear wheel rotors. You can use the van rotors, calipers and pads to get better stopping and less brake fade. I have them on my Express van now that it has 1-ton suspension under it. Stops even better with that massive 10.5" 14-bolt holding the rear wheels down and those massive calipers and rotors up front.

1983 G20 Van, 350 TPI, Ported 906 Vortecs, Edelbrock 3817 Base, ASM oversize runners. Reed Custom Roller cam, 700r4, 12 bolt with 3.08 gears, Doug Thorley Tri-Y headers, true duals


 
djackson210 
Poster
Posts: 87

Age: 37
Loc: San Antonio, Texas
Reg: 01-31-19
04-26-20 06:25 AM - Post#2792116    
    In response to 1983G20Van

This is quite possibly the best $100 upgrade I've ever done. Y'all should do it ASAP. It makes a tremendous difference. Literally zero pedal fade. I feel like I'm driving a different truck. Or, stopping a different truck as it were.

'91 Chevy C1500 SC LWB
'00 Chevy C2500 CC SWB


 
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