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

dwcsr · 06-11-2006, 05:40 PM

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,

BigDan3131 · 06-12-2006, 10:17 PM

Try www.abspowerbrake.com they do alot of one off setups like yours.

**special-K** · 06-14-2006, 06:52 PM

You can have custom hydraulic hoses made all over.

dwcsr · 06-14-2006, 07:28 PM

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.

*Shane* · 06-14-2006, 10:43 PM

May be showing my ignorance here, but what is a hydroboost and how does it work?

dwcsr · 06-14-2006, 11:08 PM

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.

**N2TRUX** · 06-15-2006, 11:02 AM

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.

*Shane* · 06-15-2006, 01:50 PM

Gotcha ... thanks guys!

dwcsr · 06-21-2006, 11:45 PM

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

Inthuwind · 10-12-2006, 02:28 PM

TTT ~just to be clear, what year and size trucks can I get from the yard to do this swap into my '68 stepper???

Bad Karma · 10-12-2006, 04:07 PM

Summit is selling hydroboost conversions now, not sure how much more expensive they are compared to the salvage yard...

qksilver · 10-12-2006, 04:56 PM

quite a few different GM models had them. Astro vans, anything diesel, and of course trucks.
Mike, I will call you this week end.
Steve

Inthuwind · 10-12-2006, 10:42 PM

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.

06-11-2006, 05:40 PM	#1
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	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, Attached Images Last edited by dwcsr; 06-11-2006 at 05:44 PM.

06-12-2006, 10:17 PM	#2
BigDan3131 Registered User Join Date: Jun 2006 Location: Maple Valley, WA Posts: 1,913	Re: hydroboost Try www.abspowerbrake.com they do alot of one off setups like yours.

06-14-2006, 06:52 PM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: hydroboost You can have custom hydraulic hoses made all over. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-14-2006, 07:28 PM	#4
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	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.

06-14-2006, 10:43 PM	#5
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: hydroboost May be showing my ignorance here, but what is a hydroboost and how does it work?

06-14-2006, 11:08 PM	#6
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	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.

06-15-2006, 01:50 PM	#8
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: hydroboost Gotcha ... thanks guys!

06-21-2006, 11:45 PM	#9
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	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

10-12-2006, 02:28 PM	#10
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	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??? __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

10-12-2006, 04:07 PM	#11
Bad Karma Magnificent bastard Join Date: Oct 2004 Location: Glendale, AZ Posts: 196	Re: hydroboost Summit is selling hydroboost conversions now, not sure how much more expensive they are compared to the salvage yard... __________________ 1977 Big Block Burb

10-12-2006, 04:56 PM	#12
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: hydroboost quite a few different GM models had them. Astro vans, anything diesel, and of course trucks. Mike, I will call you this week end. Steve

10-12-2006, 10:42 PM	#13
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	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. __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

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