Vacuum pump vs hydroboost for power brakes

I’m in the process of upgrading the 350 in 72 GS. I’ll mostly likely have 10” possibly 12” of vacuum at idle. My machinist recommends a pump. Anyone with experience with either? I thinking of using the rotary pump from Leed Brakes.

 

This looks like a premium setup. I fabbed up a similar setup using a Hella UP28 pump.
https://www.ebay.com/itm/12V-Vacuum...-/193072466670?_trksid=p2349624.m46890.l49292

*The Leeds pump to me looks like a China copy of my Germany made Hella UP28.
Those sell rather cheap on ebay, less than $75.
Hella are twice that, German made, quiet, & efficient.

 

All the vacuum pump setups Jegs, Summit, Comp cams, SSBC, etc. sell are on the noisy side for my liking. They all use that same pump.

 

For regular driving a vac can is all you need

 

He might be able to with 10-12, I sure can't with only 6".

 

This setup is similar to mine, but it looks like the china UP28 version pump to me instead of a real Hella....
https://www.ebay.com/itm/Electric-V...-/224033849682?_trksid=p2349624.m46890.l49292

 

Yes on the big cam TA roller .597 in and ex with .289/.284 duration 113 lobe separation. Guess I’ll see what my actual vacuum and brake function is once the motor finished. Then make a decision on what to do. Thanks all for the input

 

Since your cam is the same as Mike Jr's, is he having low vacuum issues?

 

Correct me if i'm wrong here, but wouldn't a can "fill" more on a deceleration than at idle? Manifold vacuum has to skyrocket when the throttle blades are closed and the engine is at speed.. I would think the idle vacuum wouldn't matter much with a can.

 

If there is only 6" and you stop and use your stored vacuum, then need to stop again quickly, how does the can get up to 15" with only 6" feeding it?
I have my pump kick on every time brake is touched, just to keep booster topped off.

 

The booster should not be completely out of vacuum with only one stop, even with the engine off. It should be good for 2-3 stops

 

They are great for repeated quick braking but in normal use,.. you'll never have a problem

 

It’s similar, my cam has longer duration as Mike suggested so I wouldn’t need the extensive head porting his heads have.

 

My brakes work fine with 7 to 9"s hg

 

Take a look at this pump - inexpensive, auto shut-off at 14 lbs. I have one on an 84 bird - works well and quieter than most other pumps. This is from a 6.0 Ford F-350 but it is also used for many other applications.


https://www.partsgeek.com/catalog/2005/ford/f250_super_duty/brake/vacuum_pump.html

 

Aren't those type pumps only designed for heat & a/c duct doors?
I had one and sold it. It didn't seem to have fast recovery or move volume like the Hella UP28 or larger models.