Hydroboost Brake Upgrades

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POWERBRAKEBOB

New member
HI GUYS! I am new here, but not new to this field. I performed many brake modifications for GMC TRUCK AND COACH for their utility and fleet customers in the 80's, and early 90's. They offered me Syclones and Typhoons when they were new, but I had too many projects then. I have focused on high performance brake systems, and have a special contract with Bosch for their HYDROBOOST brake systems. These brake boosters run off of power steering pump pressure, instead of vacuum. They are perfect for turbo charged applications. They allow for "spooling up" the turbo, and offer up to 1800 psi to the calipers, regardless of vacuum conditions. We have been installing them on the Grand Nationals with great success. Those guys can build up to 10 psi of boost on the line, for a tremendous launch. The brakes will stop faster than the truck will go.We are building one for JEG'S Typhoon research vehicle. With the 7/8" wheel cyls (a modication we performed on the S10's and GN'S in the 80's) and a HYDROBOOST, you will not need the rear discs unless you really want to spend that money. Actually, 4 discs need double the volume, and double the pressure just to make them work. Many people have spent the money for rear discs, only to have the truck stop worse. We recently installed one on the TV show "OVERHAULIN' "to fit a 67 HEMI Charger. This car had 4 Baer disc brakes, and an automatic with Gear Vendors overdrive. This car would flat out over run the brakes with just a manual master cyl. The HYDROBOOST stops this huge car with the touch of a toe. I would be happy to answer any questions you may have. 800 504 1060 Bob
 
93 TY 2185

93 TY 2185

Donating Member
Re: Hydroboost Brake Upgrades

Cool Bob a few of us have used the Hydroboost systems in our SYTY's.

I would like to hear more about the JEG'S Typhoon research vehicle.
icon_cool.gif
 
QUICK STORM

QUICK STORM

B.A.M.F. BMW Tech
Re: Hydroboost Brake Upgrades

POWERBRAKEBOB said:
The brakes will stop faster than the truck will go.We are building one for JEG'S Typhoon research vehicle. With the 7/8" wheel cyls (a modication we performed on the S10's and GN'S in the 80's) and a HYDROBOOST, you will not need the rear discs unless you really want to spend that money. Actually, 4 discs need double the volume, and double the pressure just to make them work. Many people have spent the money for rear discs, only to have the truck stop worse.
Click to expand...

why would it stop worse with rear disc brakes?
 
C

Captain Morgan

Moderated User
Re: Hydroboost Brake Upgrades

QUICK STORM said:
why would it stop worse with rear disc brakes?
Click to expand...
disc brakes can never really compare to drum brakes in terms of brakeing power. Drum brakes cover A LOT more surface area then disc brakes do, the problem with drum brakes and why they "suck" is because they get hot and there is no good way cooling them, hence they fade, get spongy, cook the fluid and fail a lot more than disc brakes do.

But if this was a perfect world and you could manage to keep a drum brake as cool as a comparable disc brake, drum brakes would out perform disc brakes every time I think.
 
QUICK STORM

QUICK STORM

B.A.M.F. BMW Tech
Re: Hydroboost Brake Upgrades

well drum brakes look ugly anyway.

i know about the braking power between the 2, i was just trying to understand what he is getting at with the statement about pressure
 
J

'JustDreamin'

Dream: 6LV8 Turbo Bravada
Re: Hydroboost Brake Upgrades

Another thing working in drum brake's favor is they are somewhat self-energizing. Meaning that once you get the linings in contact with the drum, the linings themselves help hold the brakes on (by way of the linkage designs and such). Some industrial brake designs are in fact completely self-energizing (typically in emergency brake applications where you want it to stop regardless of whether the power is still on or whatever)

'JustDreamin'
 
Don W.

Don W.

Stab it and steer it
Re: Hydroboost Brake Upgrades

:rant: Very interesting. One reason, IMHO, is that 80% or more of the braking in most vech including our trucks is done by the fronts. Just look at a 4 wheel disk Corvette comparing the fronts to the rears. Weight transfer and all that. The volume pressure question is a good one. We have divided (front rear in most cars) systems. Other than that hyd pressure is equal throughout the system (assuming equal sized master cyl pistons.) As disk brakes wear additional fluid is required but no additional pressure. (Look at your brake reservoir, the half supplying the front is larger than the rear.) As drum brakes wear no additional fluid is required due to their entirely different method of operation and method of self adjustment. Non self adjusting drum brakes (some of us old timers remember them) do require additional fluid at each application, if out of adjustment, to get the shoes out to the drums. This happens at -every- application and is the source of the old "pump the brakes" jargon. Adding disks to the rear of a SyTy prolly helps launches but does little to improve braking distance. I would assume Hydroboost would allow for increased system pressure on our trucks and, in turn, better launches. :rant: I could go on about air brakes on big trucks but I'd prolly put you to sleep.:D
 
Windedv6

Windedv6

Ty n 10s
Re: Hydroboost Brake Upgrades

POWERBRAKEBOB said:
HI GUYS! I am new here, but not new to this field. I performed many brake modifications for GMC TRUCK AND COACH for their utility and fleet customers in the 80's, and early 90's. They offered me Syclones and Typhoons when they were new, but I had too many projects then. I have focused on high performance brake systems, and have a special contract with Bosch for their HYDROBOOST brake systems. These brake boosters run off of power steering pump pressure, instead of vacuum. They are perfect for turbo charged applications. They allow for "spooling up" the turbo, and offer up to 1800 psi to the calipers, regardless of vacuum conditions. We have been installing them on the Grand Nationals with great success. Those guys can build up to 10 psi of boost on the line, for a tremendous launch. The brakes will stop faster than the truck will go.We are building one for JEG'S Typhoon research vehicle. With the 7/8" wheel cyls (a modication we performed on the S10's and GN'S in the 80's) and a HYDROBOOST, you will not need the rear discs unless you really want to spend that money. Actually, 4 discs need double the volume, and double the pressure just to make them work. Many people have spent the money for rear discs, only to have the truck stop worse. We recently installed one on the TV show "OVERHAULIN' "to fit a 67 HEMI Charger. This car had 4 Baer disc brakes, and an automatic with Gear Vendors overdrive. This car would flat out over run the brakes with just a manual master cyl. The HYDROBOOST stops this huge car with the touch of a toe. I would be happy to answer any questions you may have. 800 504 1060 Bob
Click to expand...

I have had mine for a couple of years, Works great @ luanch at any boost you want and stops my 4,000 lb brick at 130+ with no sweat. :tup:


YEMBL-DSC00001.JPG


ETCIU-Hydraboost2.JPG


HLSGM-Hydraboost1.JPG



John
 
P

POWERBRAKEBOB

New member
Re: Hydroboost Brake Upgrades

HI! THANKS. Is there any way you could go to the "TURBOBUICK.COM" site? The GN's had an electric booster that has burned out on all of them, and they think that a Regal vacuum booster is the thing to use to on a turbocharged car. They are really fighting me on it. I told them that the launch is so superior when the car hold to 10lbs of boost and more, with the hydroboost. They just don't believe me. If you have time, check out my website. it is POWERBRAKESONLINE.COM and check out the gallery. Thanks, Bob
 
P

POWERBRAKEBOB

New member
Re: Hydroboost Brake Upgrades

O.K., HOW MUCH, but a quick word on drum brakes. The purpose of disc brakes is that they DON'T LOCK. Drum brake shoes "wrap up" in the drum giving them a lot of power with a small cylinder and in the old days, manual brakes. Air brake trucks are 95% drums, as discs would melt going down a mountain. Disc brakes require a large caliper piston ( 5-6 sq inches of area) and mucher higher line pressure to pinch that slippery rotor. Average pressure in disc brakes is around 1200psi, then multiplied by the sq inches of piston at the caliper. 6 times 1200psi = 7200psi against the pads, for example. Drum brakes lock at around 600psi. Discs need over 1600psi to lock. The point is that discs require a larger piston in the master to supply the volume, but a larger piston reduces line pressure. Dual diaphragm boosters brought the pressure up, but need VACUUM. Vacuum boosters don't work well with manifold pressure. We have been converting all types of vehicles to Hydroboosts for years, but in 1995, Bendix sold out to Bosch, and the Hydroboost market dried up. In 2002, we were able to sign a special contract with Bosch, for their Hydroboost units, brand new. We started promoting them as a performance item in the last 3 years. The average price for the new Hydroboost and master, (the original master will not fit) is $525.00 with iron master. Add $75.00 for alum. master. We can provide rubber type hose set for $130.00, or better stainless braided hose set for $225.00. We are building a kit for JEG's own Typhoon project now.
 
Try Me

Try Me

New member
Re: Hydroboost Brake Upgrades

I have looked before to do this to my sy and my dads 66 chevelle ss. the chevelle just got a 496 inch big block that has far too much cam etc to make the vacuum needed for our recent power disc brake conversion. I told him this would be a better route than a vacuum canister for the space savings and braking power. Make sure to let us know when the typhoon kit is done and what the group purchase rates will be :tup: :tup: :tup:
 
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