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#176 | |
Registered User
Join Date: Jan 2006
Location: Smithfield, VA
Posts: 1,501
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Why do you have to do it?
Quote:
Why can't you just take your vehicle to a small local garage to get it done? The procedure says to bleed like normal, do an automatic bleed then bleed like normal one last time. A small time shop should not charge more than $50+- to do it. |
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#177 |
Registered User
Join Date: Feb 2009
Location: Surrey B.C. Canada
Posts: 255
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Re: First hand experience with changing to the NBS master cylinder WOW!
Has gotten considerably as well as noticeably better.
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Life is too short to drive a boring vehicle. |
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#178 |
Registered User
Join Date: Nov 2015
Location: Cailfornia
Posts: 284
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Re: First hand experience with changing to the NBS master cylinder WOW!
Has anyone actually done empirically accurate 60-0 and 100-0 testing before/after the NBS master cylinder swap? Because when I did the swap on my '99 Tahoe, extensive testing with my G-Force meter showed that braking distances actually got WORSE. Needless to say, I went back to the original master.
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77 C10 Silverado SWB - LS Swap, mechanical resto-mod 05 Z71 Silverado RCSB - 5.3L LM7, 76mm turbo, 4L80e |
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#179 | |
Registered User
Join Date: Feb 2009
Location: Surrey B.C. Canada
Posts: 255
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Re: First hand experience with changing to the NBS master cylinder WOW!
Quote:
__________________
Life is too short to drive a boring vehicle. |
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#180 |
Registered User
Join Date: Nov 2015
Location: Cailfornia
Posts: 284
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Re: First hand experience with changing to the NBS master cylinder WOW!
The fact that it improves the braking FEEL especially when you first push the pedal is indisputable. However, where is the discussion regarding the fact that a disc/ disc master is being installed on disc/ drum cars with different weight distribution and no one thought to actually measure pressures at each individual wheel as well as do apples to apples brake testing?
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77 C10 Silverado SWB - LS Swap, mechanical resto-mod 05 Z71 Silverado RCSB - 5.3L LM7, 76mm turbo, 4L80e |
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#181 | |
Registered User
Join Date: Jan 2006
Location: Smithfield, VA
Posts: 1,501
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Yeah right............
Quote:
Did you ever do the "automatic bleed" procedure? A drum system uses significantly less pressure then a disc system. Not sure if I even believe that changing the rear drum system to the pressure of a disc system would have a negative effect. Maybe the front system pressure goes down after the swap. Doesn't concern me. Be that as it may, I rebuked this post a long time ago stating many people would gain the better feel/quality of the system by simply getting the automatic bleed done. I didn't think the ABS would have an effect on the normal feel of the brakes since under normal use, the ABS is not engaged. However after reading dozens of stories concerning the results of the automatic bleed, and after having it done it myself. I know it does have an effect. Incidentally after having thought about this for years I have come to the conclusion that the ABS, although passive, is a restriction on the normal system. Allow me to elaborate. My son has a 1984 Sierra that obviously has NO ABS. His master cylinder is the same one that came on my GMT400 from the factory. He has tremendous pedal feel and incredible stopping power that I can't even get used to after having driven mine. And yet ours is always less than great. Even in the best of situations. Even after the automatic bleed, it's not as hard at braking as other vehicles including the Sierra. There were 2 things I was going to do to prove this is the case (don't really give a crap currently). One thing was to measure the fluid pressure at all 4 corners of both mine and the Sierra. The second thing was to make a set of jumper tubing to go around the ABS unit in my vehicle to copy his system so to speak without ABS interfering with the hydraulic lines. If I ever G A C in the future, I might try it. In the mean time, before anyone does any hardware changes, get an automatic bleed. Can we now let this post die a dignified death? |
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#182 |
Registered User
![]() Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 1,100
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Re: First hand experience with changing to the NBS master cylinder WOW!
Oh, my gosh..... I now own a BEAUTIFUL 2005 Yukon XL SLT....
My wonderful '88 Sierra C2500 is now owned by a collector in Germany. Rumor has it, it will be running propane by now..... But, Oh, my gosh..... This thread is grown into a monster. The brake system isn't THAT complicated...... I did the MC up-grade and no issues,,,, That was over a year ago! Kudos to the thread starter!!! ( and all the help with answers )
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'70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018) |
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#183 |
Registered User
Join Date: Nov 2009
Location: Tampa Fl.
Posts: 103
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Re: First hand experience with changing to the NBS master cylinder WOW!
Digging up this old thread,hoping someone can help me with brake line orientation on a 99 master cylinder. I am putting the hydroboost unit from a 99 silverado in my 62, but I am unsure if the master is front port to front brake, rear to rear.
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#184 | |
Registered User
![]() Join Date: Jun 2011
Location: Bradenton, Fla.
Posts: 1,100
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Re: First hand experience with changing to the NBS master cylinder WOW!
Quote:
( But we are talking about GM).... My suggestion is to just stop by a repair shop.... Good luck
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'70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018) |
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#185 | |
Moderator
![]() Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,951
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Re: First hand experience with changing to the NBS master cylinder WOW!
Quote:
The 99 abs metering module took care of biasing. Not sure how the old fashioned combination valve will react.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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#186 |
Registered User
Join Date: Jun 2018
Location: Austin
Posts: 5
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Re: First hand experience with changing to the NBS master cylinder WOW!
Speedy. What booster did you use to mount the nbs mc in the older c10. The mc have a bigger hub that won't fit in the older master cylinder. I want the newer mc because I have all 4 rear brakes and the old mc is feels to soft. Thanks
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1988-1999, brakes, mushy, obs |
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