Vacuum for brake booster? Where on a supercharged mini?
Turbo Mini Forums

Where are people getting vacuum from for the brake boster on supercharged minis considering the charger is pushing air into inlet manifold instead of the manifold sucking air.

Is anyone tapping into the inlet pipe before the charger? If so where?
Or are people retro fitting a seperate vacuum pump?

The SC12 kit has a take off in the inlet track, in between carb/injection and charger.

Edited by apbellamy on 12th Jul, 2013.

Thanks. so the intake pipe will work? I'll be running the eaton M45 from the R53 mini with a custom inlet pipe and manifold.
I am happy to modify the inlet pipe to take the vacuum hose if that works but need some examples or photos from someone on this forum.

you would need a one way valve to stop fuel getting in.

Fuel won't be an issue. I am injecting it into the inlet manifold after the supercharger.

Example.

Edited by Dutchy1978 on 12th Jul, 2013.

Anywhere between the intake valve and throttle plate will have vacuum at part and closed throttle. You would also need a non return valve so you dont blow boost into the servo.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

To assist with evaporation I will be ceramic coating the LCB exhaust manifold, using braided fuel hoses and adding a bonnet scoop to assist with cooling the engine bay.

As you know most of the manufacturers of the kit like Minispeed and vmax have the injection going into the top on the charger. Correct me if I am wrong but wouldnt this also cause evaporation as it is then spread all over the moving parts of the charger? Most modern cars have direct injection for fuel efficiency. I figure this will be as close to direct injection as I can get.

Very few cars have direct injection. Port injection yes, but direct injection is a very different thing.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Apologies. Yes I am aiming for port injection built into the manifold.