Hi Amici,
As promised, I've finally gotten around to writing up
the four pot caliper conversion that is on my car. I
aplogize for taking so long to get the details out to
all of you. First, the calipers are from a 1979-83
Toyota four wheel drive pickup (non-diesel). They
cost me $39.95 at the local discount parts store (plus
a $20 core charge). I also had to buy a "hardware kit"
for a few more bucks to the get the pins that hold the
pads. There are three things that need to be done to
fit these calipers to the Triumph uprights:
1. The Toyota mounting bolts are 12 mm, rather than 7/16",
so I made up some reducing bushings to fit into the ears
of the caliper to bring it down to the 7/16 ID.
2. The bleeder bolt uses a 10 mm wrench instead of the
standard 7/16" wrench, so you'll need to buy one of those.
3. Finally, you'll need to make up a flex line that is
SAE (or AN-3) at one end, and metric at the other end. The
caliper uses a 10 X 1.0 inverted flare fitting, which is a
bit hard to find. If you want to use a straight end right
on the line, Earl's part nuber 640803 will work. I wanted to
have a 90 degree end, so I used a metric to -3 male to male
adaptor that I got from Porterfield (1-800-537-6842). Their
part number is 420103. To be sure that it sealed, I backed it
up with a dowty washer.
That's it. Its quite an easy conversion, and the pads are
readily available from all the usual sources as this is
apparently a common conversion for the Datsun Z-cars. Since
I also have rear discs on my car now, I don't know what you'll
need to do as far as brake bias goes with the drum brakes
on the rear; you'll have to use your judgement on that one.
good luck,
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