rjleiker said:
Here's a thought... just thinking abstractly....
what would stop a person from using this Willwood remote master cylinder that comes in assorted bore sizes instead of an F-body master cylinder and then plumbing to a Keisler throwout bearing?
http://www.jegs.com/p/Wilwood/744520/10002/-1
Since everyone is worried about pedal travel and bore sizes, if the cylinder was mounted straight in, instead of angled upward (like the F-body cylinder), this would increase pedal travel and you can pick your bore size.
Just a thought... let me know what you all think about this... I'm trying to convince myself that a T56, or a hydraulic setup for future engine swaps is a better idea.
First off, let me say Hi. My name is Richard and I am in the tech department at Keisler. I have been working with Jeff (meatdrapes) to get his TKO and hydraulic kit, up and running.
To answer the questions above, mounting a master cylinder straight in to the firewall causes an issue if you cannot get the pedal connection point in the exact location that it is supposed to be in. In other words, the pedal connection point must be in the factory correct location or the geometry will be off resulting in a hard pedal.
The other half to the equation is our bearing is designed to use a 3/4" bore with a 1.4" (1 7/16") pushrod stroke. Using a master cylinder of different specs will result in 1 of 2 things happening. 1. you push too much fluid and end up blowing the bearing apart or 2. you don't push enough fluid to actuate the bearing and fully release the disc.
As Meatdrapes had to do, a pedal stop can be used to compensate for a larger bore or a longer stroke.
AS with any hydraulic setup, ideally you want the pushrod stroke to bottom out at the same time that the pedal hits the floor. This ensures that you don't over extend it or bend the pushrod.
The theory behind our angle mounted master cylinders is that it duplicates the factory mechanical pushrod angle. Our master cylinders were designed to be bolted up to the firewall in the exact same location as the mechanical pushrod coming thru the firewall. Unfortunately, on your G-body cars, the angle was so severe, that the only way we could get it to work without bending the pushrod was to use a brace that mounted against the pushrod to "stiffen" it up. While it did work, it was barbaric looking to say the least.
Meatdrapes......once again, glad you finally got it worked out and are happy with the end result. Let me know if I can be of further assistance.
Richard
Tech Support
Keisler Engineering