| Isn't that what the correct master cylinder is supposed to do? Personally, I 
wouldn't worry about it until you find an issue with it. Be prepared of it 
possibly needing one, but to add another piece that could cause more tuning 
or possibly even something else to need repiared down the line to the system 
without knowing if there's a problem doesn't make sense to me. Maybe a master 
cylinder off a vehicle well designed for this(like a 67 chevelle or something 
that came with discs up front?). I added a proportioning valve to a couple 
dodge 1 ton work vans I had years ago as the fronts didn't have enough on 
them to stop the vehicles with ladders and planks and material on them(i 
found out later they were a problem from the factory for 1983, 1984 and 1985).
TD  
> Hmmm, isn't that a metering valve? Disc to Drum. Proportioning has 
> to do with front to rear brake bias I think. You need some sort of 
proportioning
> (not necessarily a valve) even with Disc To Disc.
> JB
> > Is a proportioning valve necessary on an LSR car that has discs front and
> drums rear?
> > Dick J
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