power/no power brakes??

On the LT1 powered TVR I am working on, space is at a premium..........

On the driver's side I have clutch MC, brakes, headers, and steering all competing for space. One of the things I am thinking of to free up space around the motor is to mount the clutch and brake giblets under the dash. Thinking of possibly using the Wilwood assembly with the dual brake MC's.

Question I have is regarding pedal force. Any experience? Is pedal force with a dual brake MC arrangement going to be much much harder than a conventional power brake setup?

TIA,

-jeff d

Yes, the dual masters don't lower pedal pressure at all when compared to a single master. So you're basically comparing assisted to non-assisted.

but it's even worse than that, because now you're dividing your pedal force between two master cylinders, as well as no longer having boost. half the pedal travel to achieve the same fluid volume displacement, but twice the force.

the saving grace with these setups is that the MC bores can be a lot smaller than the stock MC, since the pistons are parallel instead of series. so you go with a pair of small-bore MCs, and you wind up with similar pedal travel to a stock setup.

and keith, please, it's pedal force, not pedal pressure. you don't hear me talking about manifold force from flyin miata turbo kits, do you?

There you go, orphan. The brake systems engineer has spoken.

Check these out:

http://www.hotrodders.com/forum/electric-power-brake-booster-73131.html

http://forums.off-road.com/jeep-short-wheelbase/192471-remote-mounted-brake-booster.html

http://www.stu-offroad.com/suspension/vanco/hydroboost-1.htm

Pressure is what you get in the lines - but I get your point.

I would disagree about the doubling of required force, though. Most "single" master cylinders in production cars are really in-line double cylinders. Anything with a dual line system (ie, anything made after, what, 1964 or so?) is going to behave, from a pressure/force standpoint, like a pair of masters.

Thanks to all for the help!! Big thanks to GameboyRMH for the hotrodders link -- actually a couple of things mentioned in there sound like something I can use to keep power boosted brakes. Car should only weigh 1900#, would like to keep the power brakes if possible....

thx!

-jeff d