4 wheel disc sep up
- Thread starter JRC86GN
- Start date
POWERBRAKEBOB
Banned
- Joined
- Mar 28, 2005
Hydroboost Vs Vacuum Vs Powermaster
None Of The "racing Brake" Companies Make The Rear Kit, As It Is Felt That Small Of A Ring Gear Is Not A Racing Axle. I Believe The Later S10's With Rear Discs Will Fit In There. A Vacuum Booster Will Defintely Not Work, As They Normally Use A 24mm Master, Which Is Too Small To Work 2.5" Pistons, And The Pressure Is Too Low. A Hydroboost Will Absolutly Work Rear Disc. A Powermaster Uses A 1.250" Piston, Which Has The Volume, But The Pressure Is Marginal. The Proportioning Must Be Changed To A 4 Disc Valve, As The 2 Disc Limits Rear Pressure To 600psi.
None Of The "racing Brake" Companies Make The Rear Kit, As It Is Felt That Small Of A Ring Gear Is Not A Racing Axle. I Believe The Later S10's With Rear Discs Will Fit In There. A Vacuum Booster Will Defintely Not Work, As They Normally Use A 24mm Master, Which Is Too Small To Work 2.5" Pistons, And The Pressure Is Too Low. A Hydroboost Will Absolutly Work Rear Disc. A Powermaster Uses A 1.250" Piston, Which Has The Volume, But The Pressure Is Marginal. The Proportioning Must Be Changed To A 4 Disc Valve, As The 2 Disc Limits Rear Pressure To 600psi.
Adam Connell
Monster Truckin since 87'
- Joined
- Oct 1, 2006
I too have seen a Baer setup for the rear... my brake SUCK so I got them on the brain and I have been investigating a lot... I think Im going with the alum drums and a full brake job.
salvageV6
Daily Driver
- Joined
- May 25, 2001
12" sport setup on the front and the disks in the back make a huge difference.
Start with the front setup first, you may not need the backs, next car I would do the front setup and try the upgraded S10 rear cylinders and keep the drums out back, just might be perfectly balanced at that point.
Mine also fit under the 15" AR rims I am using.
Here's the back setup, complete with Emerg. cabling a good kit.
Here's a front one.
Start with the front setup first, you may not need the backs, next car I would do the front setup and try the upgraded S10 rear cylinders and keep the drums out back, just might be perfectly balanced at that point.
Mine also fit under the 15" AR rims I am using.
Here's the back setup, complete with Emerg. cabling a good kit.
Here's a front one.
salvageV6
Daily Driver
- Joined
- May 25, 2001
Yes they make a big difference and don't fade, they actually stop better if you build up some heat in them.
Best part of driving the GN now, my WE4 still has the stock stuff and is always an adventure when you have to brake hard.
But the GN has less oil pressure than my WE4 so there's always some tradeoff....... :frown:
Best part of driving the GN now, my WE4 still has the stock stuff and is always an adventure when you have to brake hard.
But the GN has less oil pressure than my WE4 so there's always some tradeoff....... :frown:
Adam Connell
Monster Truckin since 87'
- Joined
- Oct 1, 2006
12" sport setup on the front and the disks in the back make a huge difference.
Start with the front setup first, you may not need the backs, next car I would do the front setup and try the upgraded S10 rear cylinders and keep the drums out back, just might be perfectly balanced at that point.
Mine also fit under the 15" AR rims I am using.
Here's the back setup, complete with Emerg. cabling a good kit.
Here's a front one.
Hey, are those M&H Drag radials? If so how do you like them... they make a 275/55/16 for my gnx knockoffs and I was wondering how they hooked and ran.
Ahhh..yes and no. You are correct in that AP, Alcon, and Brembo don't make a kit. However, I've been using Baer's 4 wheel disc brakes since 1996 with no issues whatsoever. I also converted to vacuum brakes using a 86 Cutlass booster and a 79 J56 TransAm master cylinder. The factory prop valve is gutted and I installed a Wilwood stand alone prop valve.
Mark
I have Baer rear disks and B-Body 12" front disk on my GN. I ran vacuum setup (booster, M/C, brake pedal, check valve) from 87 carb Regal. I had stock cam so good vacuum. Car stopped great. Only problem was could not hold car on the line under boost. Have recently changed over to 84 GN hydraboost setup but am having FAST/engine issues so no trip to strip.
Conrad Carter
North Carolina
Conrad Carter
North Carolina
steve hughes
Well-Known Member
- Joined
- Jul 5, 2002
Aerospace does make a kit for the stock 8.5 GN rear. I have had them on my GN with the powermaster for 2 years now. Stops alot better now. It is a race kit that does not have a parking brake.
I have this on 15'' wheels.
Evaddave 87gn
Always learning...
- Joined
- Dec 16, 2005
Crazy,,,,
Is the Willwood rotor the .810 thickness? Are you concerned with overheating?
Evaddave
Is the Willwood rotor the .810 thickness? Are you concerned with overheating?
Evaddave
Yes they are .810 thick. No, not worried about overheating.
