hydroboost....confused?
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
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From: Wyoming
hydroboost....confused?
Been reading and the more I read the more confused I get.
I have a 2000 Ex V10 4X4 with cruise control.
Will a hydroboost system for a 2000 7.3 diesel Ex bolt on without changing out the brake peddle?
I had a 99 power stroke and steering and braking was an issue. Will using a high pressure hose with a larger orifice cure that issue?
Is a new pump with a return port really needed?
Thanks
I have a 2000 Ex V10 4X4 with cruise control.
Will a hydroboost system for a 2000 7.3 diesel Ex bolt on without changing out the brake peddle?
I had a 99 power stroke and steering and braking was an issue. Will using a high pressure hose with a larger orifice cure that issue?
Is a new pump with a return port really needed?
Thanks
Senior User
Joined: May 2014
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From: SoMD
I've spent time reading about hydroboost because my brakes sucked when I got the truck. I personally think hydroboost is a PITA. Maybe off roaders get something out of it? The connection between the PS and brakes kind of annoys me. Plus, a blown line means no brakes AND no steering. Even after reading some of the threads, I just don't get it. Hydroboost conversion seems to be a way to change the way the pedal feels, and that's it.
At the race track, I teach high performance driving. People show up with street cars and their brakes fade. First thing they start talking about is vented cryo treated rotors, brembo/wildwood, etc. Uhhh, how about performance pads and a good bleed with high quality brake fluid. If that doesn't fully work, braided hoses. Call me crazy, but I think most brake problems are fixed by maintenance and pad compound choice. Which, BTW, was the fix for my sucky Ex brakes. Only, I had to bleed two fluids.
At the race track, I teach high performance driving. People show up with street cars and their brakes fade. First thing they start talking about is vented cryo treated rotors, brembo/wildwood, etc. Uhhh, how about performance pads and a good bleed with high quality brake fluid. If that doesn't fully work, braided hoses. Call me crazy, but I think most brake problems are fixed by maintenance and pad compound choice. Which, BTW, was the fix for my sucky Ex brakes. Only, I had to bleed two fluids.
Thread Starter
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Fleet Mechanic
Joined: Mar 2013
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From: Wyoming
I understand the issues, but my vacuum reading is only 12 to 14 in of hg, due to my elevation.
Hydroboost is not sensitive to elevation like the vacuum boosters are.
The difference between 20 in hg and 14 in hg is about 300 to 400 psi. Which is huge for a Ex.
Hydroboost is not sensitive to elevation like the vacuum boosters are.
The difference between 20 in hg and 14 in hg is about 300 to 400 psi. Which is huge for a Ex.
Logistics Pro
Joined: Jan 2007
Posts: 3,826
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From: Martinsburg, WV
I think the biggest issue would be that miniature PS pump that the v10 runs barely has enough juice to run the box. You would need to work around that.
I would start with a set of braided brake lines and good pads, and regular flat rotors, like centric. See where you go from there. Even with the atmospheric difference you would be surprised at how much braking force you lose through the OE hoses.
I would start with a set of braided brake lines and good pads, and regular flat rotors, like centric. See where you go from there. Even with the atmospheric difference you would be surprised at how much braking force you lose through the OE hoses.
New User
Joined: Nov 2014
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I am not sure how the conversions to hydroboost work in a Ford......I am new to Fords
That said, The guys over at IFSJA.ORG ( full size Jeep) have it down pat and I have installed it on a 1988 Grand Wagoneer. It is absolutely great. I was towing a 23 foot boat before AND after the change over. Truly, a night and day stopping power difference.
That said, The guys over at IFSJA.ORG ( full size Jeep) have it down pat and I have installed it on a 1988 Grand Wagoneer. It is absolutely great. I was towing a 23 foot boat before AND after the change over. Truly, a night and day stopping power difference.
Senior User
Joined: May 2014
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From: SoMD
I see, never dealt with altitude.
This is the thread I was thinking about and a quote from it. Good luck.
https://www.ford-trucks.com/forums/1...dro-boost.html
This is the thread I was thinking about and a quote from it. Good luck.
https://www.ford-trucks.com/forums/1...dro-boost.html
I know the thread is old but, for anyone wondering if you can hydroboost these trucks with oem parts the answer is yes. I just finished a 2003 X 2 weeks ago using all stock parts.
Get the pressure lines from a 99-04 (order them new) F-450 with the V10 cost is $43.00 for both and are a direct fit.
Get the booster from a 99-04 Diesel F250 F350 F450 F550 or X it bolts right in place of the vacuum booster. Ebay has them for 60-80.00 shipped
Reuse the master cylinder as its the correct one already
Then simply place a brass T in the return line of the reservoir and thats it.
Total time start to finish is about 2.5 hours as the hardest part is pulling the PS pump off to change the hose. Super simple and great upgrade, I am now starting on converting my F150 to hydroboost also using the above parts and so far its all a direct fit.
Get the pressure lines from a 99-04 (order them new) F-450 with the V10 cost is $43.00 for both and are a direct fit.
Get the booster from a 99-04 Diesel F250 F350 F450 F550 or X it bolts right in place of the vacuum booster. Ebay has them for 60-80.00 shipped
Reuse the master cylinder as its the correct one already
Then simply place a brass T in the return line of the reservoir and thats it.
Total time start to finish is about 2.5 hours as the hardest part is pulling the PS pump off to change the hose. Super simple and great upgrade, I am now starting on converting my F150 to hydroboost also using the above parts and so far its all a direct fit.
Thread Starter
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Fleet Mechanic
Joined: Mar 2013
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From: Wyoming
I have read that thread. It mentioned issues with brake pedal alignment.
Ford part number for brake pedal assembly diesel is f81z2455ba discontinued. The gas versions have different brake pedal assembly part numbers. So there must be a difference.
I was able to get a used 2000 7.3 diesel master cylinder, hydroboost, and brake pedal assembly, for $100 shipped. I will see how it fits.
I will get OEM hoses and drill out 1/8" orifice so pump can flow more, and tee into power steering return line.
Ford part number for brake pedal assembly diesel is f81z2455ba discontinued. The gas versions have different brake pedal assembly part numbers. So there must be a difference.
I was able to get a used 2000 7.3 diesel master cylinder, hydroboost, and brake pedal assembly, for $100 shipped. I will see how it fits.
I will get OEM hoses and drill out 1/8" orifice so pump can flow more, and tee into power steering return line.
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Fleet Mechanic
Joined: Mar 2013
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From: Wyoming
Just so everyone knows, there is no need to cut and splice.the return line in this conversion.
The F450 that came with a V10 and hydroboost, has the same power steering pump configuration as all V10s. What they did different is added a port onto the power steering resivor on the fender. That resivor has 3 nipples.....one is the return for HB pump.
two part numbers needed; f81z3a697bb is the special resivor.
f81z3a713aa is the hose from booster to resivor.
The F450 that came with a V10 and hydroboost, has the same power steering pump configuration as all V10s. What they did different is added a port onto the power steering resivor on the fender. That resivor has 3 nipples.....one is the return for HB pump.
two part numbers needed; f81z3a697bb is the special resivor.
f81z3a713aa is the hose from booster to resivor.
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Thread Starter
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
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From: Wyoming
Well my hydro booster is installed.
A diesel or V10 hydro boost break peddle is required. I got one from a salvage yard for $10.
Everything snapped into place like the unit came with my excursion.
I ordered a new 2000 ford hydrobooster, had to go to salvage yard for the metal hose extensions. They do not come with booster.
PS lines for a 2000 f450 V10 with HB fit like a glove.
OEM plastic spacer behind vacuum booster not needed.
HB unit bolted right up to the diesel peddle assembly.
Electronic switch on original peddle hooked up to diesel peddle perfect.
Bleeding system was simple and everything works great.....brakes are LOTS better.
I highly recommend this convsrsion.
A diesel or V10 hydro boost break peddle is required. I got one from a salvage yard for $10.
Everything snapped into place like the unit came with my excursion.
I ordered a new 2000 ford hydrobooster, had to go to salvage yard for the metal hose extensions. They do not come with booster.
PS lines for a 2000 f450 V10 with HB fit like a glove.
OEM plastic spacer behind vacuum booster not needed.
HB unit bolted right up to the diesel peddle assembly.
Electronic switch on original peddle hooked up to diesel peddle perfect.
Bleeding system was simple and everything works great.....brakes are LOTS better.
I highly recommend this convsrsion.
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