Hydraboost Question....
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Hydraboost Question....
Hey folks
I did a search and I think I found my answer so this might just be looking for some assurance before I lower the back end of my kwicklift and take the car down for a test drive.
I started the car up and completed the bleeding procedure, verified my lines routed and attached correctly. The pedal travel seems way less and much, much more stiff, etc. It seems like this is the "touchy" issue etc I have heard described before but I would like to be sure. I am going to jack up the rear of the car tonight and then tomorrow. Start the car, put it in gear and test the brakes that way as well.
Btw, this is in combo with the steeroids and kit and chrome PS pump they sell online.
Is the "norm" that I am experiencing? Or do I need to check something else? I called the VB&P tech line (where I purchased the kit) and he was not sure so he just suggested I call Hyddratech but based on the forums I doubt I am going to hear from them anytime soon.
Thanks
Shane
I did a search and I think I found my answer so this might just be looking for some assurance before I lower the back end of my kwicklift and take the car down for a test drive.
I started the car up and completed the bleeding procedure, verified my lines routed and attached correctly. The pedal travel seems way less and much, much more stiff, etc. It seems like this is the "touchy" issue etc I have heard described before but I would like to be sure. I am going to jack up the rear of the car tonight and then tomorrow. Start the car, put it in gear and test the brakes that way as well.
Btw, this is in combo with the steeroids and kit and chrome PS pump they sell online.
Is the "norm" that I am experiencing? Or do I need to check something else? I called the VB&P tech line (where I purchased the kit) and he was not sure so he just suggested I call Hyddratech but based on the forums I doubt I am going to hear from them anytime soon.
Thanks
Shane
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
The pedal distance travelled is MUCH less and the pedal feel is MUCH harder.
Pedal travel is about an inch or so and then the pedal stops moving. From there, it is a matter of how much pressure you apply to determine the rate of clamping force on the rotors. That being said, you will still be able to modulate your brakes to suite how rapid you wish to decelerate. The feel is fantastic.
Start out with low speed stops to get a feel for the pedal and then get out on some back roads and try out the brakes to feel how they respond at higher speeds.
Enjoy!
Pedal travel is about an inch or so and then the pedal stops moving. From there, it is a matter of how much pressure you apply to determine the rate of clamping force on the rotors. That being said, you will still be able to modulate your brakes to suite how rapid you wish to decelerate. The feel is fantastic.
Start out with low speed stops to get a feel for the pedal and then get out on some back roads and try out the brakes to feel how they respond at higher speeds.
Enjoy!
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
The pedal distance travelled is MUCH less and the pedal feel is MUCH harder.
Pedal travel is about an inch or so and then the pedal stops moving. From there, it is a matter of how much pressure you apply to determine the rate of clamping force on the rotors. That being said, you will still be able to modulate your brakes to suite how rapid you wish to decelerate. The feel is fantastic.
Start out with low speed stops to get a feel for the pedal and then get out on some back roads and try out the brakes to feel how they respond at higher speeds.
Enjoy!
Pedal travel is about an inch or so and then the pedal stops moving. From there, it is a matter of how much pressure you apply to determine the rate of clamping force on the rotors. That being said, you will still be able to modulate your brakes to suite how rapid you wish to decelerate. The feel is fantastic.
Start out with low speed stops to get a feel for the pedal and then get out on some back roads and try out the brakes to feel how they respond at higher speeds.
Enjoy!
My only other worry was I saw a post mentioning problems and they stated the PS pump they had had too high of a flow rate of between 2 and no more than 3.5GPM.
I can not find any stats on the speeddirect pump #85305): http://cmc.speeddirect.com/items.asp...atus=0&Tp=&Bc=
And Speeddirect is not answering their phones right now.
Shane
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
I have read that early C3 pumps have a ~1.6GPM flow rate and later, maybe just the 82s, have a`~1.9GPM flow rate. If anything, your on the lower side of the coin.
The pressure relief is also lower on C3 pumps, something like 900PSI ,whereas non corvette PS pumps are much higher, like 1400PSI. So if you are using your C3 pump, you should be OK from a pressure perspective what I can tell.
I'm using the set-up with both hydroboost and rack and pinion and get a little bit of pump noise at higher RPMs. I'm not sure if this is air related or pump related. I slightly overfilled the pump, trying to compensate for possible fluid starvation, but that didn't solve it. If it continues, I'll look into it further, but it seemed to be less this year as from last year from my shakedown cruises made so far.
The pressure relief is also lower on C3 pumps, something like 900PSI ,whereas non corvette PS pumps are much higher, like 1400PSI. So if you are using your C3 pump, you should be OK from a pressure perspective what I can tell.
I'm using the set-up with both hydroboost and rack and pinion and get a little bit of pump noise at higher RPMs. I'm not sure if this is air related or pump related. I slightly overfilled the pump, trying to compensate for possible fluid starvation, but that didn't solve it. If it continues, I'll look into it further, but it seemed to be less this year as from last year from my shakedown cruises made so far.
Burning Brakes
Joined: Aug 2007
Posts: 1,173
Likes: 1
From: Liberty Missouri
Hey folks
I did a search and I think I found my answer so this might just be looking for some assurance before I lower the back end of my kwicklift and take the car down for a test drive.
I started the car up and completed the bleeding procedure, verified my lines routed and attached correctly. The pedal travel seems way less and much, much more stiff, etc. It seems like this is the "touchy" issue etc I have heard described before but I would like to be sure. I am going to jack up the rear of the car tonight and then tomorrow. Start the car, put it in gear and test the brakes that way as well.
Btw, this is in combo with the steeroids and kit and chrome PS pump they sell online.
Is the "norm" that I am experiencing? Or do I need to check something else? I called the VB&P tech line (where I purchased the kit) and he was not sure so he just suggested I call Hyddratech but based on the forums I doubt I am going to hear from them anytime soon.
Thanks
Shane
I did a search and I think I found my answer so this might just be looking for some assurance before I lower the back end of my kwicklift and take the car down for a test drive.
I started the car up and completed the bleeding procedure, verified my lines routed and attached correctly. The pedal travel seems way less and much, much more stiff, etc. It seems like this is the "touchy" issue etc I have heard described before but I would like to be sure. I am going to jack up the rear of the car tonight and then tomorrow. Start the car, put it in gear and test the brakes that way as well.
Btw, this is in combo with the steeroids and kit and chrome PS pump they sell online.
Is the "norm" that I am experiencing? Or do I need to check something else? I called the VB&P tech line (where I purchased the kit) and he was not sure so he just suggested I call Hyddratech but based on the forums I doubt I am going to hear from them anytime soon.
Thanks
Shane
Burning Brakes
Joined: Aug 2007
Posts: 1,173
Likes: 1
From: Liberty Missouri
I'm using the set-up with both hydroboost and rack and pinion and get a little bit of pump noise at higher RPMs. I'm not sure if this is air related or pump related. I slightly overfilled the pump, trying to compensate for possible fluid starvation, but that didn't solve it. If it continues, I'll look into it further, but it seemed to be less this year as from last year from my shakedown cruises made so far.
Drifting
Joined: Jan 2001
Posts: 1,841
Likes: 3
From: Halifax, NS, Canada
Brent and Theiskell are right on the money. I have the identical setup with Steeroids. The brake pedal is very hard and like Theiskell says, you will get a slight rebound of the pedal especially at slow speeds. It sounds like you are good to go. It is an awesome system and you are going to love it 
