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Old 06-11-2006, 05:40 PM   #1
dwcsr
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hydroboost

Does anyone know what the fitting sizes are on a 2001 1/2 ton GM hydroboost.
And what type of fitting is used ie.. oring at end of fitting or IV flare type.
I need to make some custom hoses and it will need the fittings. I don't have the original hose to look at.

What I'm doing is putting it on my 58. I have a 2001 silverado 1500 4 wheel disc hydroboost and master cylinder. The auto parts places here say the hoses are not available.

Thanks,
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Last edited by dwcsr; 06-11-2006 at 05:44 PM.
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Old 06-12-2006, 10:17 PM   #2
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Re: hydroboost

Try www.abspowerbrake.com they do alot of one off setups like yours.
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Old 06-14-2006, 06:52 PM   #3
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Re: hydroboost

You can have custom hydraulic hoses made all over.
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Old 06-14-2006, 07:28 PM   #4
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Re: hydroboost

I know I can have them made but they all ask what size fitting do I want. I went to the junk yard and looked at one and the ends are o-ring type and those fittings are meteric only as far as I could find. One side is M18x1.5 and the other is m16x1.5 so I ordered one each and we'll see if they fit.
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Old 06-14-2006, 10:43 PM   #5
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Re: hydroboost

May be showing my ignorance here, but what is a hydroboost and how does it work?
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Old 06-14-2006, 11:08 PM   #6
dwcsr
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Re: hydroboost

its a brake booster that runs off the power steering pump. its great for low vacuum engines. At idle I have about 12 inches of vacuum so I wouldn't have much in the way of brakes in traffic or low speeds. Its that black cast iron unit behind the master cylinder.
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Old 06-15-2006, 11:02 AM   #7
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Re: hydroboost

Quote:
Originally Posted by dwcsr
its a brake booster that runs off the power steering pump.i....
Shane, these are OEM on most trucks larger than a 1/2 ton.
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Old 06-15-2006, 01:50 PM   #8
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Re: hydroboost

Gotcha ... thanks guys!
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Old 06-21-2006, 11:45 PM   #9
dwcsr
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Re: hydroboost

just for reference the fittings are M18x1.5 with an O ring at the bottom and M16x1.5 with an o ring at the bottom
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Old 10-12-2006, 02:28 PM   #10
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Re: hydroboost

TTT ~just to be clear, what year and size trucks can I get from the yard to do this swap into my '68 stepper???
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Old 10-12-2006, 04:07 PM   #11
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Re: hydroboost

Summit is selling hydroboost conversions now, not sure how much more expensive they are compared to the salvage yard...
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Old 10-12-2006, 04:56 PM   #12
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Re: hydroboost

quite a few different GM models had them. Astro vans, anything diesel, and of course trucks.
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Old 10-12-2006, 10:42 PM   #13
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Re: hydroboost

Ok Steve, give me a call. I'll be at the Toby Keith concert in Raleigh Sat. night if you can call me before 2pm, or call me Sunday. I'm really interested in the hydroboost setup. I remember you telling me about the 3/4 ton pickups and diesels, just needed some years to look for.
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