I have 3/4" on both systems. Have a balance bar and a proportioning valve [but
I
think it is wide open -- had it first]. I have 7/8" rear cylinders and Toyota 4
runner front calipers [these are wider than the Celica's and allow using vented
rotors]. This is a "track day" TR6, fronts are probably not legal for vintage.
Brake pressure on the pedal is high, but good modulation. Never pump or fade
[Have Hawk blues on front and Carbotech Panther Plus on the rear]. Now if I
just
had an engine [in the works].
Chuck
Aaron Johnson wrote:
> Hugh,
>
> I use a 3/4" for the fronts and 5/8" for the rears with a 10# residual
> pressure valve on my spitfire with 16P calipers on the front and the .700 rear
> wheel cylinders. I don't know that I like the small m/c on the rear as I
> can't get as much rear brake as I'd like. The 3/4 on the front is nice, the
> pedal effort is high, but modulation is quite good as Bill describes. I don't
> have a brake fade or need to pump the brakes up at all without a residual
> pressure valve on the fronts. I use a tilton pedal setup and I like the
> balance bar. I have it setup with the adjusting cable to play with, but I
> have yet to perform any adjustments while on track.
>
> One thing to remember with a proportioning valve is that you are only reducing
> pressure to the line which it is on from the max pressure (no valve) and you
> are NOT increasing pressure to the other part of the system. So if the valve
> is on the rear you will only decrease pressure from full, but you can never
> add more pressure. So m/c size becomes more important. The balance bar
> actually transfers leverage from the pedal to decrease pressure on one system
> and increase the other.
>
> Aaron Johnson
> #38 F-Prod Spit MkIV Oregon Region SCCA
> http://www.geocities.com/spitracer9
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