John these guys are right. Quick example, if 100lbs of leg input on a brake pedal, like a Tilton floor mount for instance with a 5.5 ratio = 550lbs of force being applied on the balance bar pivot bearing. That balance bar is in turn supported by 2 MC rods and if the bar is at 50/50 split then each MC rods are going to see an input force of 275lbs. That in turn depending on the size of the masters 5/8's for example will equate to a hydraulic line pressure of ~890lbs per master.

john vanlandingham Wrote:

> >
>
>
> I have to push a dead POS Nissan. It weighs 2450
> lbs, I weigh 200.
> I push X hard using one hand.
> Or I push X hard using two hands spaced about
> shoulder width apart....
>
> It weighs what it weighs and I weigh what I weigh
> and can only exert X force even if I pushed with
> my rawk hahd cawk and balls*
>
> Posing made up examples which shift substantially
> the whole notion being examined rarely elucidates
> the problem.
>
>
>
>
take your own example....put a scale between your hand and the car....you weigh 200lbs and lets say you push (with one hand) and exert 200lbs (measured by the scale).

Now you push the same amount, but w/2 hands. put a scale underneath each hand....your body is pushing 200lbs....distributed equally, 100lbs at each hand. The car still gets pushed the same amount and the sum of the scales = 200lbs.

You can push harder with one hand than the other, but the other hand must then have less force.....50lbs on your left, 150 on your right...still 200 total felt by the car.




OR....if I'm using my bathroom scale....I weight 200lbs whether i stand on one foot (200lbs on 1 foot), or stand normal on 2 feet (100lbs per foot).



Or 20 lbs per toe. either way I'm still fat.

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Jon Burke - KI6LSW
Blog: http://psgrallywrx.blogspot.com/



Edited 1 time(s). Last edit at 07/23/2009 02:51PM by Jon Burke.

Jon Burke Wrote:
-------------------------------------------------------
> Or 20 lbs per toe. either way I'm still fat.

No doubt tons of fun!

I think Salta Motorsports in Denver was going to start making Prodrive style brake booster eliminators for STIs. I know they made one for their car anyhow...

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Grant Hughes