Re: Treadle Vac Conversion

Posted by HH56 On 2022/1/30 18:15:01

The linkage to increase pedal ratio would make all the difference if it is thin enough to be done on a Packard. A big problem on using anything with Packards placement of the BTV in the original location is it is tucked in the frame and the length of the space available is limited by the location of the steering box. If the linkage is thin and can be positioned so one of the shorter electric masters will fit low or maybe angled to bring one of the relatively thin electric masters up above the frame rail an inch or so to clear the steering it would be a welcome conversion.

I know of a couple of the ElectroBoost systems installed low and using the 1:1 ratio. On those the power unit is turned up to high boost to compensate for the low ratio. I never saw any feedback from those conversions to know what happens if the power unit fails and stored energy is exhausted. With the 1" piston on the master at 1:1, I suspect the stopping ability would be as dismal as it was with the modern vacuum booster setup most conversions have used when tried in the original location.

More information on the linkage would be greatly appreciated if you have it. Not a lot of detail in the article and I don't see any photos or mention of it in the ABS website info. Wonder if it is made by someone else or custom to that specific car application.