Hydroboost Help

[Motohead]

Does anyone have experience with hydroboost on a 69 Camaro? I have P/S with KRC Type 2 HP pump and Concept One dual return reservoir, new steering box, Wilwood at all 4 corners including MC with new P/S and brake lines. SS lines running from box to HB to pump.The brakes have been bled. I am going through the P/S and HB bleeding process. When I push on the brake pedal, it pulses and pushes back on the first push. Then is feels pretty steady except I can see the pedal has a slight slow return. If you hold the pedal down at idle you can hear a slight whine. When you turn the steering wheel to lock you can hear the slight whine and see the HP line from pump to HB jump a little. The fluid is no longer going down in the reservoir and is steady. I've never had HB and don't know what's normal and what's not. I don't want to drop car off of stands to realize I don't have brakes. I have yet to set prop valve on MC. All tests were at engine idle.

[Mkelcy]

I recall some weirditude when I was first driving my '68 Camaro with the HB - including feedback through the brake. That all cleared up pretty quickly. Maybe call Hydratech and ask them what's normal?

[Hotwire]

For grins and giggles, crack the cap or leave it open and try operating your brakes. Wondering if the small vent hole in the reservoir cap is causing isses?

[Motohead]

Will do. I did a test drive yesterday. I have brakes. They are really really touchy. The only concern is that it is noisy when on brakes or turning.

[Mkelcy]

If you've got brakes, I'd drive it. I was very concerned initially, then everything got happy and the brakes and steering are better than fine.

[Motohead]

Spoke with Hydratech today and they said to keep bleeding and driving. Depending of several factors, it may take a minute to get all the air out. I have brakes, it's just noisy when steering and braking. HT said it was air still trapped. Most likely micro-bubbles.

[jimco84x]

Spoke with Hydratech today and they said to keep bleeding and driving. Depending of several factors, it may take a minute to get all the air out. I have brakes, it's just noisy when steering and braking. HT said it was air still trapped. Most likely micro-bubbles.

Hydratech also if usually very adamant about the type of PS fluid used. Lubeguard, Redline or Royal Purple. Give it some miles to work through. Also, you'll have much more line pressure at the same pedal pressure so you might end up playing around with different pads to the stopping power vs pedal feel you want. A pad with a high initial grip, might be too much with Hydraboost.

[Motohead]

Hydratech also if usually very adamant about the type of PS fluid used. Lubeguard, Redline or Royal Purple. Give it some miles to work through. Also, you'll have much more line pressure at the same pedal pressure so you might end up playing around with different pads to the stopping power vs pedal feel you want. A pad with a high initial grip, might be too much with Hydraboost.

They did recommend the fluids you stated. But I don't see anything wrong with Lucas Oil products. Plus, I really don't want to drain the entire system and start the bleeding all over again if I don't have too.
KCR did not have a preference. I am running Wilwood pads and 6 pistons up front, so it may be too much. I still have to set the prop valve too.

[CarlC]

I tried them all but the GM Power Steering Fluid was by far the best. Old Man Lee at Lee's Power Steering turned me on that many years ago after having similar problems.

[toddz69]

I tried them all but the GM Power Steering Fluid was by far the best. Old Man Lee at Lee's Power Steering turned me on that many years ago after having similar problems.

Same. Tommy Lee was the guy who told me 30 years ago to use that. Paul at Hydratech used to say that was OK too but maybe he likes other stuff more now.

Todd Z.