Original Cobra Pedal Boxes

blykins · #1 (**permalink**) 08-18-2003, 10:38 AM

For those of you that know:

Did the original cars have pedals that hang from the top of the footbox, or did they pivot from the bottom?

Thanks,

Brent

KobraKarl · #2 (**permalink**) 08-18-2003, 10:41 AM

brent ,

the floor

KK

Whaler · #3 (**permalink**) 08-18-2003, 10:41 AM

I was told they pedals were on the bottom

Excaliber · #4 (**permalink**) 08-18-2003, 11:11 AM

They were on the floor, which now that I think about must have been a problem??

The two master cylinders, front and rear brakes (3 including the clutch) must have been lower than the calipers. This is considered "bad form" as air can be trapped between the caliper and the master cylinders and won't bleed properly.

Bench bleeding of the master cylinder would have been critical. Also, topping up the fluid would not have been easy (like it's "easy" with MINE under the dam fender, lol).

Ernie

Bob Putnam · #5 (**permalink**) 08-18-2003, 11:28 AM

Quote:

Originally posted by Excaliber

The two master cylinders, front and rear brakes (3 including the clutch) must have been lower than the calipers. This is considered "bad form" as air can be trapped between the caliper and the master cylinders and won't bleed properly.

Bench bleeding of the master cylinder would have been critical. Also, topping up the fluid would not have been easy (like it's "easy" with MINE under the dam fender, lol).

Ernie

It's just the opposite.

Master cylinders lower than the calipers fill the lines from the bottom, pushing the air out the top easily.

On the other hand, when the master is high, you've got to force the air out (and down) in front of the fluid - at the same time that the air is trying to rise. Probably why all those fancy bleeding systems got invented.

The possible problem unique (if you'll pardon the expression) to low-mounted cylinders is that, due to gravity, fluid may tend to back out of the calipers toward the master cylinders. but only if the fluid reservoir is also lower than the calipers. Systems with low reservoirs require a residual pressure valve to keep the caliper pistons from retracting too far.

blykins · #6 (**permalink**) 08-19-2003, 02:09 PM

So what about the gas pedal...that little pic is kinda hard to see...is it floor mounted also, or top-hung?

computerworks · #7 (**permalink**) 08-19-2003, 02:59 PM

hung from the top...

Bob Putnam · #8 (**permalink**) 08-19-2003, 03:23 PM

Here's an enhanced image. A little PSP magic.

blykins · #9 (**permalink**) 08-20-2003, 12:07 PM

Thanks for the help guys...and for the pictures.

blykins · #10 (**permalink**) 08-23-2003, 06:40 AM

Guys...I was thinking of putting the Wilwood Brake/Clutch pedals in my car...the ones that are floor mounted like the above pic. However, I was looking on their site at the technical drawings, and these things are like 10.5" tall...doesn't that seem too tall? I went out and looked in the footbox of my SVC, and it seems like the pedal pad would be about midway up in the box.

Is this how it should be?

Bob Putnam · #11 (**permalink**) 08-23-2003, 06:59 AM

Blykins,

Measure the distance from your heal to just below your toes - where your foot would normally hit the pedals without leaving the floor. Then add 1/4". Or not.

blykins · #12 (**permalink**) 08-23-2003, 08:58 AM

Bob,

What brand pedals to you use in your cars? Or are they custom made?

Brent

blykins · #13 (**permalink**) 08-23-2003, 09:20 AM

Nevermind...I looked on your webpage...Thanks again Bob.

Excaliber · #14 (**permalink**) 08-23-2003, 09:35 AM

Thanks Bob, it makes perfect sense. Air would not be the problem. Possible retraction of the caliper pistons would be!

Ernie