Thread: Some recent progress pics

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Looks super----what's the problem with the brakes??????????drum or discs??

Mustang II up front and drums in the rear. To make a long story short, my Kia master cyl won't pump enough fluid to make everything work on the first try. I have put residual valves in, swaped the MC, set up the rear brakes, changed pedal ratio and nothing makes a diff. It always takes 3-4 pumps to get a firm pedal.

Try adjusting those rear drums. That should help a lot.

Nice project! Do you have any plans to use an adjustable regulator for the fuel system on the TBI set up? The GM ones sure are not that great.

I don't know. I never knew there was any problems with them. What should I look for as problems?

Originally Posted by 53 Chevy5

Mustang II up front and drums in the rear. To make a long story short, my Kia master cyl won't pump enough fluid to make everything work on the first try. I have put residual valves in, swaped the MC, set up the rear brakes, changed pedal ratio and nothing makes a diff. It always takes 3-4 pumps to get a firm pedal.

Don't think this is the problem but i don't think you need residual valves in the lines as long as the m/c is above the brakes. and your m/c is above the brakes. and if it takes 3-4 pumps i'm thinking air in the line ..

Can't see from the pics, did you maybe use the long, through-the-frame fittings with hard line inside, flex outside to the slaves? I recall that there was a big run of those long fittings where they built them with tubing that had a large ID, threaded for fittings on the ends and they trapped air and could not be bled free without some gymnastics. I agree it sounds like you've got some air trapped.

I use a vacuum pump on the bleeder fittings, with a quart vacuum bottle, to assist in bleeding brakes.

I see that you have a power steering pump ?????? You should consider using a Mustang hydraboost master set up in stead of the vacumune Kia----and maybe even graphing in a mustang pedal assy since its fire wall mounted and not under the floor--------then pedal ratio would be correct , etc

Originally Posted by rspears

Can't see from the pics, did you maybe use the long, through-the-frame fittings with hard line inside, flex outside to the slaves? I recall that there was a big run of those long fittings where they built them with tubing that had a large ID, threaded for fittings on the ends and they trapped air and could not be bled free without some gymnastics. I agree it sounds like you've got some air trapped.

Mostly used the short fittings, but I made most of the lines myself, I do have the long threads on a couple of lines. It is 3/16 line and I was having a lot of trouble making double flares so I just made single flares, that shouldn't bother should it?. It acts exactly like air in the system but as much brake fluid I ran though it I thought there would be no way there could be. In the picture you see that I have two front lines running to the proportioning valve. Last night I put a T in them and ran a single line to the valve and plugged the second output port on the valve for the fronts and it did seem to be a bit better, but not much.

Hi, I'm new
Your kia master may have to small a bore and too short a stroke, I used a MC off a s-10 pickup, I also have a Mustang II with metric calipers/disc up front and drums in the rear, I did not need any residual valves and have great brakes. I did use the s-10 proportioning valve. the s-10 van MC is smaller than the trucks if that's what your looking for. Did you bleed from the farthest to the nearest? new lines hold a lot of air so does new wheel cylinders.

Hope this helps
Godspeed
MrC.

enlarged and looked at you pic----in a braking system, you can't plumb things down, then up and over and down again--this creates sections of tubing that are arches and air will collect there and forever be soft pedal-------------same thing with fuel lines----

I sure hope that's it. I know the booster and M/C are off a Kia, which doesn't even seem right, but it is such a nice little set up that doesn't look bulky under the hood. It does make sense what you said, in fact now that you said it, I should know better. We had that same problem with an old JD tractor when I was young. I thought the mechanic was so smart when he just lifted up the fuel hose and it ran perfect. I will definitely re route my lines, but it will be about a week till I get to it, the Mrs and I are taking a little get away trip first. Thanks so much for your help!