Hydroboost Brake Systems

[Elliott]

Hydroboost Pages

The Astro hydroboost is only $125 shipped if you don't need the master cylinder (1980 down to about '74 or so FSJ), add $25 for the MC if you do need it and another $53 for the mount (depending on the type mount you'd like, $98 for stainless). I have this worked up for the M715 and Commando also. Then I have a setup for the CJ7, Jeep Wrangler YJ, TJ, ZJ and find these work in Chevy S10 applications.

**I've recently verified these can be used for a direct bolt in (after threading the rod for the clevis) '68-'82 C3 Corvettes.

Also added a new set up for the CJ5 utillizing a one piece mounting bracket so there is no additional charge for a second spacer.
These hydroboosts will work for every year FSJ by tweaking a few things. If you have done brake upgrades, have a good solid system that is set up and bled correctly but just don't think it's performing like you think it should... this system will knock your socks off.

For current Ebay listings go to:

http://www.ifsja.org/forums/vb/showthread.php?t=106056


I also have other $200 one ton units with the longer accumulator from '03+ GM rigs. Email me if interested.

This is a NEW hydroboost I am selling on a limited basis, this is show with the adustable rod end, a stainless mount and the P30 iron MC:
Pricing on the new units here are $275 for the HB without the MC, shipped, make that $328 shipped with a painted mount or $398 shipped with a stainless mount (while the small supply of stainless mounts lasts, the next run might be double...) the stainless plates are cut a little oversize and are blank for the bolt pattern to keep them more universal, the fit and drill is up to you but it is a pretty close match to the aluminum firewall block.... too narrow for a CJ, but will fit a TJ and many other vehicles at 5x5".





The new (one ton) HB with a long accumulator (add $50 for the accumulator upgrade):



This is one type of '74+ FSJ stainless spacer available for $54. Purchased/shipped separately from a buddy:



This is the new mounting assembly that replaces the aluminum firewall block which requires a spacer, $46 Has a 6* angle built in for improved pedal rod angle. Length varies with specific application:





Installation tips:

1) Under no circumstances do you bleed this system with the engine running.
2) Under no circumstances should you EVER manually pull the brake pedal up from the floor or you will render the Hydroboost inoperable.
3) If you replace your master cylinder you must first bench bleed it and then bleed your brake system prior to bleeding the hydroboost system.



Running all discs? These are reported to work just fine with the Astro MC (in all cases excepting with the addition of very large bore calipers from one ton trucks, as in the F450 with big pistons) but you want to add a larger reservoir. Alternatively, you can use '77-'82 Corvette master cylinders for most applications but may want to use a one ton truck MC depending on which calipers you are running.


***If you are interested in buying one of these from me, either buy the one on ebay or click on my name and send me an email (don't PM me please).



Hydratech's (these guys are pros and sell new systems as well as hose fittings/lines) info on brake bleeding and PS system flushing:
http://hydratechbraking.com/forums/viewtopic.php?t=282
http://hydratechbraking.com/forums/viewtopic.php?t=129

[Elliott]

Just a heads up, if you locate a ~'98/'99 or so F250/350/450 with hydroboost you can look right in front of the the radiator at the lower, driver's side and there you'll find a PS cooler with slip on hose fittings. The units for the F450 are larger, at least on the later trucks. I'll put a pic up of the '90s model when I get it loaded. Hydrboosts do add temp to your PS system and here in TX, if you offroad, you'll probably want to add something like this. I have no idea what the dealer gets for these, but you won't find them listed on Autozone or RockAuto.

[Elliott]

Cooler:

[Elliott]

Here are some different setups available:

This is an Astro van HB setup using a stainless mount that will bolt straight to the face of the aluminum firewall block on a '74+ FSJ:



This is an Astro van HB setup using a full steel mount that replaces the aluminum firewall block on a '74+ FSJ and uses the existing firwall bolt holes. The rotation is the Std rotation:



Same as above only with an inverted rotation for the HB which gives greater clearance at the valve cover (nice for big blocks):



This is a comparison of the '74+ FSJ aluminum booster block and the steel single flange HB mount that replaces it:



This is another pic of the single flange '74+ replacement mount:



Here is a Scrambler single flange mount for the Dodge HB:



The Scrambler/Dodge HB assembly:

[Elliott]

This is for a '84 FS Bronco....




Here's one of the '67-'73 firewall plates. Still basically a prototype, it's kind of a bugger to get exactly how I want it. This will have the tube welded on at 6*+ to match the angle that was on the booster.



Also have a tri five Chevy mount coming out in a single flange....

[Elliott]

Those '67-'73 FSJ position 2 mounts are now in production. Have some goodies coming back from the machine shop this week I'll be posting up on...

[Elliott]

Here's a pic of the position 2 FSJ mount/setup:




These are the new MC rotator plates that allow you to 1) clock your HB differently to a Dodge angle, 2) to adapt a 3.2 bolt center MC to a 3.4 bolt center HB and visa versa:



Now you can rotate the HB to put the accumulator in one of these two positions:

[Elliott]

I have different hydroboosts listed all the time so check them out over at:
http://www.ifsja.org/forums/vb/showthread.php?t=106056

Jeep ZJ Hydroboost mounts now available.

[Elliott]

I have hydroboost mounts for your Jeep TJ.