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Elliott
04-29-2009, 07:46 PM
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. I have this worked up for the M715 and Commando also. Then I have a setup for the CJ7, Jeep Wrangler YJ 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. :D

This is a current listing: I have more Astro units at the moment:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=290313703190QQssPageNameZMERC_VIC_RCRX_Pr4_Pc Y_BIN_IT&refitem=290308927540&itemcount=4&refwidgetloc=closed_view_item&usedrule1=CrossSell_LogicX&refwidgettype=cross_promot_widget&_trksid=p284.m183&_trkparms=algo%3DCRX%26its%3DS%252BI%26itu%3DUCI%2 52BSI%26otn%3D4


Here is a link to one of the newer units and you can check my other listings for the other HB options I have right now:

http://cgi.ebay.com/ebaymotors/05-Dodge-Hydroboost-Master-Cylinder-disc-disc_W0QQitemZ290313279524QQcmdZViewItemQQptZMotor s_Car_Truck_Parts_Accessories?hash=item29031327952 4&_trksid=p3911.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318

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


This is the stainless spacer available for $54. Purchased/shipped separately from a buddy:

http://i361.photobucket.com/albums/oo53/65Gladiator/HB/StainlessHB-Spacer.jpg

This is the new mounting assembly that replaces the aluminum firewall block which requires a spacer, $35 + shipping. Purchased/shipped separately from another buddy, length varies with specific application:

http://i361.photobucket.com/albums/oo53/65Gladiator/HB/HBMount1.jpg


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

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