Installing VBP Rack Attack & Have Hydoboost Line Question
Thread Starter
Instructor
Joined: May 2007
Posts: 114
Likes: 16
From: Parrish Florida
Installing VBP Rack Attack & Have Hydoboost Line Question
I have a Hydroboost brake system installed on my 70 Vette and I'm in the process of installing the VBP Rack Attack. I was wondering if there are any special connections of the P/S lines. I figured the high side coming from the Hydroboost would connect to the racks high side and the return line would go from the rack to the P/S pump. If this isn't correct, pleas steer me right.
Thanks,
C.J.
Thanks,
C.J.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Yeah that's basically it. There is a high pressure line from the power steering pump to the Hydro. Then a high pressure line from the Hydro to the stock assist unit, or in your case, to the Rack. Then the return line from your rack, will meet the return line of the Hydro in a 'T' and re-enter the pump reservoir.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
Thread Starter
Instructor
Joined: May 2007
Posts: 114
Likes: 16
From: Parrish Florida
Thanks for the info and the inline P/S fluid cooler tip. Your guys knowledge on this forum is priceless.
V/R
C.J.
V/R
C.J.
Yeah that's basically it. There is a high pressure line from the power steering pump to the Hydro. Then a high pressure line from the Hydro to the stock assist unit, or in your case, to the Rack. Then the return line from your rack, will meet the return line of the Hydro in a 'T' and re-enter the pump reservoir.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
Yeah that's basically it. There is a high pressure line from the power steering pump to the Hydro. Then a high pressure line from the Hydro to the stock assist unit, or in your case, to the Rack. Then the return line from your rack, will meet the return line of the Hydro in a 'T' and re-enter the pump reservoir.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
I might suggest that you install an inline fluid cooler in the return line to the pump. This will help with fluid temperatures and hot fluid is one of the worst things for a power steering pump.
Is it the hydro unit or the rack that produces the heat? I understand the hydro unit does not produce as much return flow volume, so your effects might be real limited in the cooling dept if it is put in that return line.
B..
Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 113
From: Saginaw Michigan
Heat is generated inside the pump as it works against entire system backpressure.
Return flow from the gear and from the hydroboost unit usually are tee'd together someplace close to the return spout on the pump reservoir.
The highest flow is from the return port in the gear to the pump. So if you are going to install a cooler that is the line that you want to use.
Also you want the return flow from the gear to be the most direct route back to the pump. Return flow from the hydroboost unit only occurs when you step on the brakes. So bring the hydroboost flow into the T at right angles. Make the return flow from the gear to be as "straight through" the Tee as possible.
Jim
Return flow from the gear and from the hydroboost unit usually are tee'd together someplace close to the return spout on the pump reservoir.
The highest flow is from the return port in the gear to the pump. So if you are going to install a cooler that is the line that you want to use.
Also you want the return flow from the gear to be the most direct route back to the pump. Return flow from the hydroboost unit only occurs when you step on the brakes. So bring the hydroboost flow into the T at right angles. Make the return flow from the gear to be as "straight through" the Tee as possible.
Jim
Thread Starter
Instructor
Joined: May 2007
Posts: 114
Likes: 16
From: Parrish Florida
