Tim,
The R31 Skyline/Pintara has a solid rear axle but the rear discs are still
very suitable to be used on any Datto IRS rear end. The bits you need from
the R31 are:
disks rotors, callipers, brackets and both calliper to bracket mounting
bolts (2 each side)
flexible hydraulic lines
rear handbrake cables
(Note. Check that the rotors aren't under size which is 9.4mm or wont be if
they need machining.)
Here is an abridged step by step guide to fitting R31 rear disks to a Datto
IRS.
Remove the half shafts, short axles (you will need a breaker bar and a slide
hammer to do this), drum brake components and backing plates. Disconnect the
handbrake cables but leave the hydraulic lines in place;
(Note. Mark the axles & bearing spacers so you know which side they came
from and return them to the same side.)
Ream out the centre holes of the mounting brackets a couple of mm to easily
fit over the lip on the IRS hub;
Grind the lower and side lips of the mounting brackets until they fit
absolutely flush on the IRS hub and clear the control arm;
Drill out the lower left hand mounting bolt hole to 11 mm on both of the
mounting brackets for a reference point;
Make a template for the IRS flange bolts from a drum backing plate or from
the flange itself;
Weld up the other 3 holes on the mounting bracket and re-drill them (10mm)
to suit the IRS bolt pattern. Use the original IRS drum backing plate
mounting bolts to attach the brackets. Re-install the small axles, I
recommend you fit new lock nuts (pn 43262-21000 x 2) torqued to 240 ft/lbs;
Connect the hydraulic lines and bend them carefully so they don't contact
with the outer uni joints;
Bleed the system and check that the rotors aren't binding. If there is any
sign of binding there's a good chance the mounting bracket isn't absolutely
flush with the hub and to fix this you have to pull it all apart again, so
take care the first time round with the bracket;
Re-install the half shafts;
Test drive it and enjoy the stopping power.
Hook up the handbrake cables which is a bit tricky. The R31 cables have to
be shortened a bit to suite a 510, other models you just may be lucky.
As you can see it's a fairly straight forward conversion as far as rear
discs go.
regards
Terry
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tim Piggott
Sent: Tuesday, 10 October 2000 9:31 PM
To: [EMAIL PROTECTED]
Subject: 200b sss coupe
hey,
in regards to the r31 is it possible to keep the existing IRS diff thats
already on the car and just whack on the disc's ?- or will i need to use the
diff from the r31 to get it to fit? If not what other options do i have that
would allow me to keep the IRS?
Cheers
Thunda
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