Dual 7" Servo

[Mike]

Originally Posted by GreatOldOne

Wow - seeing the metro and the dual side by side really reinforces how much more assistance you'll get.

My calculations, based on the surface area of the diaphrams, assuming there is one at say 6", and one at 5", suggest around 55% more boost.
However, I read in one of the adverts the gain is only 25% more?

I'll eagerly await your proper road test!
Mike

[Mike]

Originally Posted by Mike

My calculations, based on the surface area of the diaphrams, assuming there is one at say 6", and one at 5", suggest around 55% more boost.
However, I read in one of the adverts the gain is only 25% more?

I'll eagerly await your proper road test!
Mike

Jason

Just a thought..... could the Sportster take an " 8" " booster on the basis the 7" is exactly the same maximum diameter as the Metro?
It would be very tight in the Cabrio, but might have been possible?

You are welcome to try mine before I alter it, as I'll be several months before I am ready to put it in for the dreaded test.

[GreatOldOne]

Originally Posted by Mike

However, I read in one of the adverts the gain is only 25% more?

Yes, but 25% more compared to what? I'd assume that's against a stock yank wagon booster - which when you look at their engine bays (Not small), and the size of the cars (enormous), it wouldn't be a tiny metro-ish servo.

[Mike]

I've just found this whilst googling:

How much pressure should I be getting to the wheels with a power booster?
Typically you should expect about 1000 psi. to the wheels for a disc brake system. A disc brake system requires this amount of pressure so be careful when using a smaller 7" booster that puts out only 900 psi pressure. Use our AC2004K Pressure Tester Kit to get a pressure reading at any point in the braking system.

What size booster do I need?
For lighter weight vehicles like street rods a 7" booster will work fine for disc/drum set ups. For a 4 wheel disc system a 7" booster will not give enough assist. An 8" dual diaphragm booster is the ticket for 4 wheel disc.