Formula94lt1

This seems pretty popular in other types of vehicles, offroad especially, and some large v8 cars like the mustang as well as vans, trucks etc already have them. Ive driven a jeep wagoner with an aftermarket astrovan setup and frankly they were the best brakes ive ever been behind as far as feel. Solid as hell and highly responsive. That was with stock jeep crap brakes. Given the painful location and removal of booster and other parts blocked by it Im curious what everyone else thinks about going this type of route?

AirtekHVAC

Any links for info? I have never heard of such....

svpmx83

google HydroBoost

danglerb

No connection to me, looks like they use the power steering pump to make boost for the brake system.

http://www.hydratechbraking.com/tech.html

17prospective buyer

Sorry but, on a Porsche, that still has more than acceptable brakes for todays standards? Why? Do you like less pedal feel and effort? Last i checked brake boosters are among the parts on cars with the least failure rate assuming proper operation.

danglerb

I can see how this would change the feel of the brakes, but not how it would change actual effectiveness, seems very fishy to me.

Strosek Ultra

I have to do this kind of conversion on my old BMW 635CSi in order to make room for the hotted intake system (ITB´s). Probably also for my old BMW 323i E21 for the Dellorto DHLA48 carbs. Do not like to do it on the E21 as it has no power steering pump and adding a pump will rob horsepower. Cannot see an advantage over vacuum brake boosters but more space in the engine bay. I am using genuine BMW (ATE) parts.
Åke

http://bmwe32.masscom.net/maxf_website/booster.htm

WallyP

Probably due to complications caused by making RHD cars into LHD ones, British cars of the sixties sometimes had remote vacuum brake boosters. Perhaps you could find a remote unit to just relocate a booster on your Bimmer.

KenRudd

The cranky Vacuum-for-Everything system is the spirit of the 928. Anger the gods at your peril.

Strosek Ultra

Yes, I have considered a remote vacuum booster but as I have acquired the needed parts I will go for the hydraulic booster for the 635CSi. For the E21 I am thinking of a brake booster delete with an increased pedal ratio of about 6:1. I have never used a boosterless system and I like to know how much more of pedal effort to expect.

Åke

xschop

Ive driven an LS1 powered 944 with the Ford Mustand hydroboost. Very effective way to get boosted brakes and extra cylinders in the bay (vac booster doesn't fit). I could see it as a plus for being able to get the clutch MC in/out of the 928 without having to schedule 8hrs lol. That and a larger MC to boot.

This was my design to get the 12 degrees needed when the vac booster was removed. If not the Booster plunger will wear out real quick with -12* if mounted straight to firewall. Not sure what 928 pushrod angle is set to from factory however.

Specs.....FW Plate 3/8" T6061-T6 alloy
HB angle plate 3/16" tempered steel

Formula94lt1

Thank you xschop! That was my original point, better access to the clutch parts and the amount of boost is irregardless of engine operating conditions i.e. manifold pressure. The Jeep that I drove had a large MC and a lot of boost so it took a modest amount of pedal pressure to slow that gigantic heavy truck to a stop and there was almost no pedal travel, but excellent modulation. It was interesting and I think it might be a good swap for the 928. Hydroboost has been around a long time, its tried and true.

xschop

The mustang HB reservoir is also incorporated in the unit and in the ideal spot if installed in the 928. The adapter plate would be easy to make as well. If I go with a radical cam, I'll follow suit.
http://944hybrids.forumotion.com/sea...results=topics

danglerb

Link needs a password and registration.

WallyP

"...I have never used a boosterless system and I like to know how much more of pedal effort to expect."

Just disconnect and plug the vacuum line to the booster and drive it. You will know quickly what it is like.