As Randall Young has reminded me, there is another reason why you cannot use
the existing hard line for the Toyota conversion: The TR6 caliper uses a
bubble flare at the caliper while the Toyota uses a double flare at the
caliper. Looking at the diagrams in the below referenced article will make
it clearer.
Hugh
-----Original Message-----
From: Hugh Barber [mailto:tr6nut@sbcglobal.net]
Sent: Friday, September 26, 2003 4:46 PM
To: Triumphs List; 6pack List
Subject: Late TR6 Calipers vs. Toyota Calipers - the final word?
Listers,
After all the traffic this afternoon about TR6 calipers vs. Toyota calipers
re:metric/english, I decided to see for myself. I've made the Toyota mod,
but its been a while and occasionally my memory fails me (sound of wife
laughing hysterically in background). I went out to the garage, pulled a
set of late TR6 calipers out of the parts box, pulled the front wheel off my
TR6 and compared the original "6" calipers to the Toyota 4-pot calipers on
the car.
Girling 16PB
bleed screw - 10mm x 1.0
hard line thread - 10mm x 1.0
Toyota 4-pot
bleed screw - 10mm x 1.0
hard line thread - 10mm x 1.0
So the threads are the same. However, you cannot re-use the original hard
line when making the Toyota upgrade. Due to the different
configuration/size of the calipers, the line is too short and bent wrong to
use with the Toyota caliper. A new hard line must be made using the "old"
fitting that screws to the flex line. A nice write-up of this is found at
http://www.cs.du.edu/~ljanssen/tr6_brake_install.html
Well I'm happy now :^)
Hugh Barber
Hollister, CA
'73 TR6
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