1972 270 hydroboost conversion
Author
Message
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
1972 270 hydroboost conversion
I instlled a hydroboost on the 270 yesterday. I used a hydro boost off of an 06 E450. I mounted the booster as low as i could on the original bracket so the resorvoir would clear the floor.\n
\nI had to add add some metal to the brake arm to move the plunger hole to a spot where it would get a full stroke and the lever throw was not to long. It took a few holes to get it right.\n \nThe entire bracket then just bolts back up. I drilled a hole in the floor for adding brake fluid and cut the carpet in a flap so it is hidden. I then removed all of the hydro vac system. I just need to have 2 power steering lines built and connect my lines. I also need to install a proportioning valve.\nYou do not have the required permissions to view the files attached to this post.
- Offline
- Moderator
- Posts: 1199
- Joined: Sat Jan 26, 2013 2:32 am
- Travco Model:
- Location: Kerrville, Texas
Re: 1972 270 hydroboost conversion
I know there are some members on this forum that would definitely be interested in this. Please be sure to post up your road test results!
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1972 270 hydroboost conversion
I got all the new hydro boost lines made along with all new braided hoses and all new 1/4" tube. I used about 35 feet of brake tube. I used a chevy proportioning valve for disc/drum with a built in residual pressure valve. It turned out pretty nice. I still need to connect the wire from the old block to the new one. I have not yet driven it do to a gas tank issue but this weekend it should be on the road.\n
You do not have the required permissions to view the files attached to this post.
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1972 270 hydroboost conversion
I just drove the travco for the first time. It brakes great. It stops very quickly and feels similar to e450s i drive at work. I can brake and turn at the same time and the stock pump does well. I did not drive it with the hydrovac brakes so i cannot really compare it to the before but i am very happy with it. Also it hasnt been driven since the 90s and it did great. Very well built rig.
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1972 270 hydroboost conversion
\nThe master faces rearward opposite of a regular vehicle but the original also faced rearward. The pedal is still the same.rjsdotorg wrote:So was this same as my '71, and the master now faces rearward instead?\nThat's what I wondered most about converting the pedal-lever.
- Offline
- Senior Contributor
- Posts: 159
- Joined: Tue Feb 05, 2013 2:28 pm
- Travco Model: 270
- Location: Newmarket, Ontario, Canada
- Contact:
Re: 1972 270 hydroboost conversion
Your 72 should have drums on the front ?
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1972 270 hydroboost conversion
my 72 had drums but i swapped the front axle to disc.
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1972 270 hydroboost conversion
I made my first trip on the highway to my house, about 25 miles. Had a few engine issues like spark plug wire fell off but the brakes worked well, even with the rear brakes unadjusted it stops with light pedal effort. I am going to make a master cylinder shield to finish it after i take care of about 15 other travco projects.
- Offline
- Senior Contributor
- Posts: 110
- Joined: Thu Jun 18, 2015 12:10 am
- Travco Model: 1972270 commerical travler
- Location: Fredericksburg VA
Re: 1972 270 hydroboost conversion
" I used a chevy proportioning valve for disc/drum with a built in residual pressure valve."
I swapped my 72 font axle to a 76' front with disc brakes. I used the 76 hydroboost MC and will be connecting it soon. Do you have the part number for the chevy proportioning valve you used?
I swapped my 72 font axle to a 76' front with disc brakes. I used the 76 hydroboost MC and will be connecting it soon. Do you have the part number for the chevy proportioning valve you used?
- Offline
- Contributing Member
- Posts: 70
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona