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> Power assist brakes, Has anyone done it?
theer
post Mar 23 2025, 11:28 AM
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I Race an LS2 powered 914 and an LS1 powered 944 with a bunch of other guys. The 944 has a Ford hydro-boost system in place of the stock vacuum booster (no room with the v8). Works great, if maybe a little touchy for my taste.

The 914 has upgraded Boxster brakes, but no power assist. I like it better, but everyone else prefers the assist.

Has anyone figured out a way to get power assist for 914 brakes? We are pursuing an idea to use a Tesla brake module in the front trunk, with a stock MC (cap off all but one brake line) driving a slave cylinder which activates Tesla master. Even Better would be a electro brake module that’s hydraulically activated directly from the master…

We are still brainstorming, so any ideas are welcome!

Thanks!
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gnomefabtech
post Mar 27 2025, 10:17 AM
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https://powerbrakes.com/pb900-universal/

https://mpbrakes.com/product/bs1011k-dual-d...-brake-booster/

https://www.amazon.com/Remote-Electric-Boos...r/dp/B07B8V7H34

https://thejeepsterman.com/products/remote-...willys-and-jeep

These are a few options for hydraulically activated remote boosters. These things are used in vans and things like that where the engine compartment is tight. For the "single system" ones like the Jeep unit, you'd use two, one for the front and one for the rear. Mount anywhere the hoses can go.

The double system could still be used in conjunction with a balance bar style master if you want perfect bias adjustment. Or just use a rear proportioning valve.

As for the vacuum source, I used to have a motorcycle powered race car and I used the little GM vacuum pump for a vacuum source and it was totally good. But honestly, you could just use engine vacuum with a check valve (like all factory setups). Even on a race track, you'll add plenty of vacuum when engine braking and it's stored for the next time you brake. Unless you "never lift" of course, then yeah, get the pump lol.

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Posts in this topic
theer   Power assist brakes   Mar 23 2025, 11:28 AM
technicalninja   I'd look into a dedicated "race" typ...   Mar 23 2025, 12:37 PM
JeffBowlsby   Maybe Ken Brock will respond to this thread? Mayb...   Mar 23 2025, 05:59 PM
Chris914n6   What he said ^^ Way easier to do the 'race...   Mar 23 2025, 08:09 PM
theer   Thanks guys- the objective is to reduce the pedal ...   Mar 24 2025, 07:27 AM
Superhawk996   Thanks guys- the objective is to reduce the pedal...   Mar 24 2025, 07:39 AM
Chris914n6   Does a dual pedal system make the brake pedal “...   Mar 24 2025, 08:39 PM
Superhawk996   The proposal to use the stock master cylinder, the...   Mar 24 2025, 07:38 AM
Larry.Hubby   I did add vacuum assisted brakes to my 914-6 conve...   Mar 26 2025, 09:05 PM
Vicious   I did add vacuum assisted brakes to my 914-6 conv...   Mar 26 2025, 09:58 PM
Artfrombama   I did add vacuum assisted brakes to my 914-6 conv...   Mar 27 2025, 04:54 AM
technicalninja   Impressive fitting of a vacuum booster! Make ...   Mar 27 2025, 08:32 AM
technicalninja   Two more thoughts... I too, prefer Tilton over Wi...   Mar 27 2025, 08:46 AM
Superhawk996   And this is the more telling, I've seen boo...   Mar 27 2025, 09:03 AM
gnomefabtech   https://powerbrakes.com/pb900-universal/ https://...   Mar 27 2025, 10:17 AM
Chris914n6   It actually wasn't said but they are referring...   Mar 27 2025, 01:54 PM
Ron914   It actually wasn't said but they are referrin...   Mar 27 2025, 03:32 PM
Root_Werks   Larry's adaption is truly impressive! I t...   Mar 27 2025, 03:28 PM


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