Hydroboost Installation Q?

[Bigdav160]

Has anyone mounted a hydroboost unit to the factory vacuum booster bracket?

I have seen CaptainFabs brackets that eliminate that feature and mount the hydroboost unit to the firewall.

I've also heard concerns that the pedal is touchy after conversion (mounted to firewall). Sometimes attributed to incorrect pedal ratio(?) and nothing to do with CaptainFab's brackets.

I noticed the factory power booster bracket has a small amount of lever ratio built into it.

It also looks like mounting the hydroboost would be a snap as it is almost the same length as my 3/4ton vacuum booster and the mounting holes are nearly the same.

[Custom 68]

I made a mount for mine and mounted it close to the firewall. It is not touchy it is very controlled seems even more so than the old vacuum booster setup.

[cleszkie]

My hydro-boost is mounted that way with the bracket. It doesn't look as clean as mounting directly to the firewall, and the master cylinder comes pretty close to the alternator. However, the pedal ratio adjustment that you get with the bracket makes for a very user friendly pedal action (not touchy).

[jeffahart]

I know you're asking about using the vacuum bracket, but why not use the firewall mount that came with the booster? I'm pretty sure the rod on the vacuum was longer. I even had to build up the pedal arm so the rod could reach. Here's the thing with me on the hydroboost conversion. I figured if I mod the rod once, then if I ever needed a new booster, then I'v be in for another rod mod. Now I can just grab off he shelf and stuff into the heap! So I added some metal to the pedal!

But, yea, once you get the pedal/rod settled it's an easy upgrade. I would just get a booster that matches the master!

[argonaut]

cleszkie,
Are you saying that you mounted the hydroboost directly to the original bracket with the lever setup? Any pics?
I converted mine a couple months ago and mounted the hydroboost using the original bracket. It feels like I'm not getting as much boost as I'm used to with the conversions I did on my 64 and 66 pickups. I was thinking that it is because the lever on the blazer system effectively cuts the pedal pressure in half. Or maybe my pump isn't putting out enough pressure? Regardless I'm wondering why GM used this funky lever setup on the 72 blazer.