hydroboost conversion
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On The Tree
Joined: Mar 2009
Posts: 100
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hydroboost conversion I am putting an lq4 out of an 07 chevy 2500hd in my 88 suburban. What would i need to make my suburban hydroboost? I already have the pump for it, its on the motor factory. Any help would be appreciated. Also how would i need to route the hoses? If i didn't want to convert it could i still use the same power steering pump?
get the HB brake booster unit and brake pedal (the pedal has a different diameter connection for the booster) out of a similar year suburban. Run the 1st pressure line from the pump to the booster, then a 2nd pressure line from the other port on the booster to the pressure side of the steering box. lastly, the two low pressure nipples (one on the booster and one on the steering box) are plumbed back to the return side of the pump.
Staging Lane
Joined: Jul 2006
Posts: 67
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I'm just wrapping up my own hydroboost setup.
There is a good hydroboost discussion here:
http://www.thirdgen.org/techboard/br...ydraboost.html
The examples I've seen have the HB getting a high pressure line from the PS pump. Another high pressure line goes from the HB to the steering box. The third line from the HB returns to the reservoir. The PS box also returns to the reservior, usually via a cooler. Ideally, the two return lines should return to the reservoir individually. Some people will "T" these and if you do, you may get a hitch in your steering during high demand periods.
There is a good hydroboost discussion here:
http://www.thirdgen.org/techboard/br...ydraboost.html
The examples I've seen have the HB getting a high pressure line from the PS pump. Another high pressure line goes from the HB to the steering box. The third line from the HB returns to the reservoir. The PS box also returns to the reservior, usually via a cooler. Ideally, the two return lines should return to the reservoir individually. Some people will "T" these and if you do, you may get a hitch in your steering during high demand periods.
I used one from an Astro van with a master cyl. from a G30 van and my stock S10 reservoir. It works fine other than I have a hard pedal all the time. Almost no travel in the pedal, but it will put you through the windshield.
Alvis, is that a proportioning valve going to the rear? I've heard the same thing from multiple people about the pressure coming from the HB MC's to 1/2 ton brakes. Fine with me, I like a firm pedal, and the akebono ceramic pads on the Blazer/Tahoes can use all the help they can get.
anyhow, I ran across this site today. some HB stuff on it, might be a help to someone in the future. http://www.classicperform.com/TechBook/PowerSteeringTechTips.htm
and here http://www.classicperform.com/tech.htm
anyhow, I ran across this site today. some HB stuff on it, might be a help to someone in the future. http://www.classicperform.com/TechBook/PowerSteeringTechTips.htm
and here http://www.classicperform.com/tech.htm
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Alvis, is that a proportioning valve going to the rear? I've heard the same thing from multiple people about the pressure coming from the HB MC's to 1/2 ton brakes. Fine with me, I like a firm pedal, and the akebono ceramic pads on the Blazer/Tahoes can use all the help they can get.
anyhow, I ran across this site today. some HB stuff on it, might be a help to someone in the future. http://www.classicperform.com/TechBook/PowerSteeringTechTips.htm
and here http://www.classicperform.com/tech.htm
anyhow, I ran across this site today. some HB stuff on it, might be a help to someone in the future. http://www.classicperform.com/TechBook/PowerSteeringTechTips.htm
and here http://www.classicperform.com/tech.htm
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. I am thinking since the m/c is for a disc/drum application is causing my problems and another reason I am wanting an aftermarket one. Just can not find a good part # for one. 
Sorry to hijack your thread 
None of the brakes are locking up, just seems the rears do not have enough pressure to them. Truck stops fine, I just would like a little softer pedal and the ability to dial in my rear brakes. I can see they are working by the wear on the rotors, plus I had it on jack stands testing everything before putting it back on the road. The valve is a SSBC not saying it cannot be bad, but not a cheap aftermarket knock off part either. I had this same issue with the rear brakes before switching to the h/b and hoped by changing m/c when I added the h/b would solve the issue. Really my biggest concern is to have softer pedal, but would like to get both issue's resolved. Thanks
It could be you are running just the right combo of brakes front/rear that it is balanced without a valve. about the only thing you can do is try it without the valve, even all the way turned out they still restrict flow a little bit.
and yea, ssbc prop valves are good stuff, probably no issue there. Good luck.
and yea, ssbc prop valves are good stuff, probably no issue there. Good luck.
