Re: break system problem....master cylinder v/s calipers

[Doug Ahern <D170A833@xxxxxxxxxxxxxxxxxxx>]

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On 59 03/08/05, pablo wrote:
> I did a complete disc break upgrade retrofiting my 65 dart gt drum system 
> with a set of calipers and knucles from a 79 Dodge Aspen plus a 73 uper 
> control arms.
> I used typical dual master cylinder (67-78) and a proportional valve from 
> summit. The whole system worked ok when I first run the car, but to be 
> honnest the car doesn't really stop like suppose to do. I fact, It break 
> less compared to the previous drum system.
> 
> My question is,
> 
> Is possible that the master cylinder is not big enough to run the calipers 
> properly????

1) make sure you are using a disc brake MC (the two reserviors will have
two different sizes,,,  the res. that services the discs will be larger,
and in the rear; the res. that services the rear drums will be smaller..
you said 'typical dual MC',  make sure its a typical DISC MC....)
2) make sure you've got the right res plumbed to the discs. 3) make sure 
you are using 3/16" steel lines throughout (i'm not sure how you'd do
it otherwise,,,), 4) open up the prop valve all the way it lets a full
dose of hydraulic pressure go to the rear.

how is the pedal pressure?  are you using a power booster?  what kind
of MC is it?  (do you know the original application?)

Doug Ahern

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