On Tuesday, October 24, 2000 12:07 PM, lee.k.janssen@lmco.com
[SMTP:lee.k.janssen@lmco.com] wrote:
>
> For the same brake fluif pressure the 7/8" bore will create 56.2 percent more
> force than a 0.7" bore.
> For the same coefficient of friction more force will generate a shorter
> stopping distance.
That's all true, but only if your hydraulic system (and right leg) cannot
generate enough pressure to lock the wheels. Is this the case on a TR6 ? The
few times I've "locked 'em up" on my TR3A, it's been the rear brakes (.625"
cylinders with 9" drums) that lock first. Clearly in my case, enlarging the
rear bores is _not_ going to improve overall braking.
Balance is extremely important to optimize a braking system. Having one set of
brakes be more effective than the other is _not_ the way to the shortest
stopping distance. (Ask anyone who's ever driven an unloaded pickup truck
without ABS.) This is why many cars, before the advent of ABS, used levers and
such to measure and adjust relative braking effort front/rear. Any fixed
proportion (like our beloved TRs) is a compromise at best.
Randall
59 TR3A daily driver
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