I have always wondered why a vacuum pump on a booster would not do the exact same thing as manifold vacuum. It would not even need to be that big a pump as the master vac is relatively small. Only need to maintain about 45 mmhg.

This guy was using an undefined Honda Accord booster. We need to figure it out. It bolted right up!

On 11/18/2025 at 11:13 PM, conedodger said:

This guy was using an undefined Honda Accord booster. We need to figure it out. It bolted right up!

Do you have any more info for this? Where did you see it?

Found it. So, this guy on Facebook posted these pictures. Apparently, he used a Bosch Gen 2 iBooster. The housing, I get the impression he found an open source file and 3D printed it.

Here is what I have, he says it works better than his GTR brakes!

Looks like a bunch more room in there doesn’t it?

I found some good pics, etc. of that booster here >> https://irate4x4.com/threads/ibooster-electric-brake-booster.394316/

Mounting: The mounting bolt pattern is 2.375" x 3.1875" square with a 2.5" center bore pass through:

Good find Cap. I snatched the Gen 2 wiring pic.

Apologies to Zedyone. We’ve either hijacked his thread or added a schmit-load of complexity. 😎

We’d need the @Yarb inator to help us with the electrons.

Lol!! The Yarbinator.

Love it! ☺️

Ok, cancel the Yarbinator. I found a video on YouTube and it only takes three wires.

Frankly, the video is one of the best produced car vids I’ve ever seen on YT. If I knew how to link it…

Oops! Hurt some feelings. So, the @Yarbinator will tell us where the three wires go. One is battery +, one is battery -. But I just can’t figure out what to do with the third wire??? John? Can you help? 🤓

This thing apparently boosts effort by 500#! Which makes sense. It’s made to stop 5000# cars and trucks. You’ll hear it referred to as a Tesla booster. It’s not. Tesla buys it from Bosch. Other ICE cars were using it two years before Tesla.

It would be interesting to see what this booster could do with stock calipers… physics tells us not to put too much weight close to the dancing shoes.