vacuum change over?

[GNguy198687]

Hello guys/gals, Dan in Scranton Pa, new here. If I wanted to change over to vacuum booster brakes, what do I need and or need to do? Get booster and master and vac canister first? Do I have to drill firewall or get new brake pedal? Vacuum filters and check valves? Any info will help, thanks

 

[1pdqV6]

Great write up here. http://www.gnttype.org/techarea/brakes/Powermaster_to_vacuum.html

I did it a couple of weeks ago. it was not too difficult at all. & this article had some great tips.

 

[cruzn57]

HINT..............
remove the drivers seat,, lay a blanket on the studs.
so much easier!

 

[GNguy198687]

Excellent, thank you

 

[MRW487]

I had mine converted a few weeks ago. Stops a lot better than the PowerBastard....The only thing is my pedal feel is quite different from any other car I have driven. My mechanic modified my old pedal per the instructions. Im sure it could be fine-tuned but its ok for now. I might pick up a manual pedal from a salvage yard sometime and have it swapped out. As far as the rest of the kit its top shelf. You will be happy with the results. Check Kirbans out. They have several kits.

 

[Knux65]

Here's the write-up I used when I did he conversion. The pictures are very helpful.

http://www.tomsttype.com/html/vacuum_brake_install.html

 

[MRW487]

Thanks Knux.....Is the filter in the new vacuum line between the block and the booster needed? I don't have one installed. Part number?

 

[1pdqV6]

Here's the write-up I used when I did he conversion. The pictures are very helpful.

http://www.tomsttype.com/html/vacuum_brake_install.html

I used that as a reference also, very well done write up. And its def worth the 10 min it takes to remove the seat, I dont know how anyone could do it with the seat there. You would have to be Houdini lol.

Sent from my C6616 using Tapatalk

 

[turbofrank]

If you are skinny like me seat can stay.

 

[RmvBfrFlght]

Thanks Knux.....Is the filter in the new vacuum line between the block and the booster needed? I don't have one installed. Part number?

You can do it one of two ways, either use the inline filter or use a different check valve. See this picture:

http://www.tomsttype.com/assets/images/brakeinstall22.jpg

Note the check valve and that it is skinny with an X molded into the front piece. There is another GM check valve that is more bulge shaped, I've gotten some off of late '80s - into '90s Astro vans. These have a cleaner look then using the inline filter.

RemoveBeforeFlight

 

[MRW487]

What is the filter for?

 

[scot w.]

I might pick up a manual pedal from a salvage yard sometime and have it swapped out.

This will / Should solve your peddle problem. I got mine from a junk yard (removed for me) for only $20 and it worked great!

 

[DAILYFLOGGER]

What is the filter for?

It contains charcoal to deal with gas fumes. Mine blew apart on the third boost blast----which left me with no power assist...

 

[MRW487]

ok.... I wasn't aware of any fumes in the vacuum line. Now I know. Also I am having steel braided lines installed later this week. These might help the pedal feel a little also.