astro hydroboost question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**slepysal** · 12-18-2012, 02:31 AM

I was thinking of using the stock master cylinder that came with the hydrobooster I got off of a 1999 Astro.
My question is are the brake ports reversed on the Astro master cylinder?
I know on the stock cast iron vette mastercylinder the rear port feeds the rear drum brakes, and the front port feeds th front disk.
Any help would be great thanks

blazins10 · 12-19-2012, 01:21 AM

usaully the bigger resorvor spot in the master is the front , doesnt matter about the master cylinder , u can run any master on it , and the astros had two different hydro setups on them , one with a staight mounting plate and one with an angled one i got mine out of early 90s astros
Posted via Mobile Device

blazins10 · 12-19-2012, 01:25 AM

and there a valve in the newer masters ( i cant remember its name ) but i want to stay away from them , its in gm masters from like 85 and up , makes them hard to bleed
Posted via Mobile Device

**slepysal** · 12-19-2012, 11:37 AM

Right on thanks .I got mine off of a 99 with the slanted plate. I took it to a local shop
(Power Brake exchange in San Jose ) and had them take the bracket unt off. He charged me a whole 5 bucks. I got a mounting plate off boardmember CaptinFab.
I wanted to use the Astro master becuse it is so light, but thanks to your info I'll most likley get an old school corvette aluminum one.Oh and I totaly dig your avatar !
Thanks again

12-18-2012, 02:31 AM	#1
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	astro hydroboost question I was thinking of using the stock master cylinder that came with the hydrobooster I got off of a 1999 Astro. My question is are the brake ports reversed on the Astro master cylinder? I know on the stock cast iron vette mastercylinder the rear port feeds the rear drum brakes, and the front port feeds th front disk. Any help would be great thanks __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

12-19-2012, 01:21 AM	#2
blazins10 Registered User Join Date: Apr 2010 Location: vancouver wa Posts: 181	Re: astro hydroboost question usaully the bigger resorvor spot in the master is the front , doesnt matter about the master cylinder , u can run any master on it , and the astros had two different hydro setups on them , one with a staight mounting plate and one with an angled one i got mine out of early 90s astros Posted via Mobile Device __________________ ///Relaxed Atmosphere

12-19-2012, 01:25 AM	#3
blazins10 Registered User Join Date: Apr 2010 Location: vancouver wa Posts: 181	Re: astro hydroboost question and there a valve in the newer masters ( i cant remember its name ) but i want to stay away from them , its in gm masters from like 85 and up , makes them hard to bleed Posted via Mobile Device __________________ ///Relaxed Atmosphere

12-19-2012, 11:37 AM	#4
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: astro hydroboost question Right on thanks .I got mine off of a 99 with the slanted plate. I took it to a local shop (Power Brake exchange in San Jose ) and had them take the bracket unt off. He charged me a whole 5 bucks. I got a mounting plate off boardmember CaptinFab. I wanted to use the Astro master becuse it is so light, but thanks to your info I'll most likley get an old school corvette aluminum one.Oh and I totaly dig your avatar ! Thanks again __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.