Good morning everyone.
I have a 1983 ford flareside that I will be doing a hydroboost conversion on. I grabbed a hydroboost and mc off of a 1990 f350. When I pulled it from the wrecker is was stupid and decided to cut the pressure lines. I'm trying to figure out what size fittings are the pressure lines. Measured the threads and they are sitting at 18. But I can't seem to find any definite answers about the sizes.

 

I have no idea but when I couldn't figure out the fitting size, I look on rock auto for the parts and sometimes, not always they will list the thread size on the part.
You might get lucky that way or with someone who knows here.

 

Did you look into metric lines for the master?
As Dusty said look up the parts you are talking about and see how they are listed.
You may need to check on a few sites before you get the answer.
Dave ----

 

It's been a long time but I was finally able to get around to doing research into the hyd lines. From what I could tell they are 11/16 and 5/8 fittings and I would need to buy some russell adapters to switch them to an.

 

Why are you reinventing the wheel on an F100?

Vacuum assist for a truck that size is simple, light, proven and plenty.

 

The factory lines are not that expensive from rockauto. You will need to change the reservoir on the pump also to work with the hydroboost system. Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart

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Add to Cart FVP 71416 Info
Hydroboost To Gear; Hydroboost System; Exc. F53/F59 Stripped Chassis
$8.04

FVP 71852 Info
Pump To Hydroboost; Hydroboost System; F53 Stripped Chassis (Only 1 Remaining)
$8.23

EDELMANN 71852 Info
Pump To Hydroboost; Hydroboost System; F53 Stripped Chassis
$8.64

FVP 71442 Info
Pump To Hydroboost; Hydroboost System; Exc. F53/F59 Stripped Chassis
$8.86

FVP 71853 Info
Hydroboost To Gear; Hydroboost System; F53 Stripped Chassis
$9.15

EDELMANN 71416 Info
Hydroboost To Gear; Hydroboost System; Exc. F53/F59 Stripped Chassis
$9.47

EDELMANN 71442 Info
Pump To Hydroboost; Hydroboost System; Exc. F53/F59 Stripped Chassis
$10.18

EDELMANN 71443 Info
EXC. HYDROBOOST
$10.94

EDELMANN 71853 Info
Hydroboost To Gear; Hydroboost System; F53 Stripped Chassis
$11.21

SUNSONG 3401511 Info
$14.10

GATES 362600 Info
Pump To Hydroboost; Hydroboost System; F53 Stripped Chassis
$17.22

GATES 365930 Info
Hydroboost To Gear; Hydroboost System; Excludes F53/F59 Stripped Chassis
$18.97

GATES 366200 Info
Pump To Hydroboost; Hydroboost System; Excludes F53/F59 Stripped Chassis
$20.79

GATES 359720 Info
Conventional System
$22.79






Power Steering Pressure Sensor

 

 

Thing is our boxes don't use rubber o rings they use flare IIRC.
True the vacuum setup works fine if you have it on the truck.
My truck did not have power brakes so took everything from the parts truck to make it power brakes.
Dave ----

 

What I snapshotted is the adapters necessary at the hydroboost the OP is using. At the box it should be 7/16-24 and 1/2-20 inverted flare.

 

I changed my rear brakes to disc and have the crown vic front cros member. I never liked the look of the factory lines. I have sourced the adapters for the hydro boost( thank you). I also have a bad habit of " oh let's try this now" lol

 

I hope you grabbed the brake pedal out of the same truck as well. Hydraboost trucks had the pin located in a different position. You can use a vacuum brake booster pedal with hydraboost it just will be touchy as hell.

 

Unfortunatly I did not grab it. And I have yet to see one at the wreckers lately. But I did look into it since I have had a couple days to do research, seen a lot of people just remove the pin and relocate it. I'll be digging into it more if I can't get a brake pedal.

 

You think manual pedal would be the same as the hydro?
I can tell you power & manual pedals are different. The pin is different height from the pivot.
Dave ----

 

Pin is part of the pedal on Fords. GM used a bolt and you could just simply drill a new hole ive done that before.

What I planned on doing was putting some feelers out on Ebay for a pedal using the OE part number if I decide to go Hydraboost on my '82. Thats where I got the updated gas pedal from that has more throw than the one I currently have.

You might be able to cut the pin off and get some round stock in the same diameter drill a hole slightly under size then hammer the pin in the new position then on the back side weld it up.

 

Manual brakes had the pin situated closer to the top of the brake pedal to give you a longer length of pedal after the pin for more leverage with less effort. In vacuum power brakes they lowered the pin to take some of that leverage away as you didnt need it. In hydraboost they lowered the pin even further as the power brakes using hydraulic assist is so much stronger you need even less effort to apply it. Now I do not know if Ford did this with their hydraboost thats why I would get the pedal from the same vehicle you are robbing the hydraboost from to be safe.

It is why at work switching a truck from vacuum brakes to hydraboost we had to relocate the pin as the pedal was so touchy every time you barely touched the pedal it felt like you were mashing on it as you were thrown forward through the windshield if you werent wearing your seatbelts.

CPP and Hydratech who sells hydraboost conversion kits cite in their instructions to lower the mounting point of the hydraboost rod.