993 calipers and adapters - mounting torque?
02-27-2013, 01:21 AM
#1
Rennlist Member
Thread Starter
993 calipers and adapters - mounting torque?
So I decided to replace the stock 964 calipers with 993 versions mainly for heat advantages for DE. I have the 993 calipers mounted but have not been able to find a reference to the torque specs when attached to a 964 with an adapter. I am hoping that one of our fellow Rennlisters will be able to give me some insight on this.
What do I torque this adapter to?
What do I torque the 993 caliper to on the adapter?
The old dirty stock caliper - happy to see it replaced
The 928 rotors fit perfectly
993 calipers look like beasts in comparison with the stock caliper
What do I torque this adapter to? What do I torque the 993 caliper to on the adapter? The old dirty stock caliper - happy to see it replaced The 928 rotors fit perfectly 993 calipers look like beasts in comparison with the stock caliper
02-27-2013, 01:27 AM
#2
Rennlist Member
Thread Starter
A few more pics...
The new RS29 pagids are much bigger than the old 964 RS29 pads - looking forward to trying them out at Limerock in April.
Here is how the 993 calipers and rotors look with the CCW
And again..
The new RS29 pagids are much bigger than the old 964 RS29 pads - looking forward to trying them out at Limerock in April. Here is how the 993 calipers and rotors look with the CCW And again..
02-27-2013, 04:15 AM
#4
Three Wheelin'
304mm rotors so not a huge difference but the caliper and pistons are somewhat bigger.
We had this torque question about a year ago. I think the answer was 85nm for both bolts which is the value from the manual and is well short of the full torque you can put on a m12 12.9 bolt. http://www.cncexpo.com/MetricBoltTorqueNm.aspx I was concerned that the torque might need reducing when mounting into aliminium, but apparently not.
We had this torque question about a year ago. I think the answer was 85nm for both bolts which is the value from the manual and is well short of the full torque you can put on a m12 12.9 bolt. http://www.cncexpo.com/MetricBoltTorqueNm.aspx I was concerned that the torque might need reducing when mounting into aliminium, but apparently not.
02-27-2013, 08:00 PM
#5
Rennlist Member
Thread Starter
There is a possibility that after the caliper update many will opt to also convert to the 993 master cylinder (I'm fully prepared for this but want to see how the pedal feels before I go that route). The good news is that the 993 master is a lot less expensive than a replacement 964 master.
02-27-2013, 08:08 PM
#6
Rennlist Member
Thread Starter
304mm rotors so not a huge difference but the caliper and pistons are somewhat bigger.
We had this torque question about a year ago. I think the answer was 85nm for both bolts which is the value from the manual and is well short of the full torque you can put on a m12 12.9 bolt. http://www.cncexpo.com/MetricBoltTorqueNm.aspx I was concerned that the torque might need reducing when mounting into aliminium, but apparently not.
We had this torque question about a year ago. I think the answer was 85nm for both bolts which is the value from the manual and is well short of the full torque you can put on a m12 12.9 bolt. http://www.cncexpo.com/MetricBoltTorqueNm.aspx I was concerned that the torque might need reducing when mounting into aliminium, but apparently not.
02-27-2013, 09:20 PM
#7
Three Wheelin'
I think the point is that for steel-on-steel you could theoretically torque a 12.9 m12 to ~146nm, at a mere 85nm any downward adjustment for the aluminium (i've seen suggestions around -30% depending on the grade of aluminium) isnt necessary. The other critical factor is the amount of thread engagement, i've seen info that no adjsutment to torque is needed for 6series ali as long as you have say 2x the bolt diameter thread engagement.
Anyway I didn't feel qualified to make the final decision so I think we checked with 9m in the end who confirmed 85nm for all the bolts.
Sensible to check with the suppliers of your bracket though.
Anyway I didn't feel qualified to make the final decision so I think we checked with 9m in the end who confirmed 85nm for all the bolts.
Sensible to check with the suppliers of your bracket though.
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02-27-2013, 09:41 PM
#8
Racer
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The conversion is probably one of the cheapest "brake upgrades" for the 964. There is no big difference in pricing related to the rotors and pads compared to stock set up - maybe $60 extra for pads and rotors. 993 C2 calipers come up for sale all the time and you might find them in good condition for about $300-500. The adapters from Rennline will set you back $200. So for me, this upgrade is costing me ~$500 in total discounting the fact that I was going to have the rotors and pads replaced anyway.
There is a possibility that after the caliper update many will opt to also convert to the 993 master cylinder (I'm fully prepared for this but want to see how the pedal feels before I go that route). The good news is that the 993 master is a lot less expensive than a replacement 964 master.
There is a possibility that after the caliper update many will opt to also convert to the 993 master cylinder (I'm fully prepared for this but want to see how the pedal feels before I go that route). The good news is that the 993 master is a lot less expensive than a replacement 964 master.
02-27-2013, 10:20 PM
#9
Rennlist Member
Thread Starter
The conversion is probably one of the cheapest "brake upgrades" for the 964. There is no big difference in pricing related to the rotors and pads compared to stock set up - maybe $60 extra for pads and rotors. 993 C2 calipers come up for sale all the time and you might find them in good condition for about $300-500. The adapters from Rennline will set you back $200. So for me, this upgrade is costing me ~$500 in total discounting the fact that I was going to have the rotors and pads replaced anyway.
There is a possibility that after the caliper update many will opt to also convert to the 993 master cylinder (I'm fully prepared for this but want to see how the pedal feels before I go that route). The good news is that the 993 master is a lot less expensive than a replacement 964 master.
There is a possibility that after the caliper update many will opt to also convert to the 993 master cylinder (I'm fully prepared for this but want to see how the pedal feels before I go that route). The good news is that the 993 master is a lot less expensive than a replacement 964 master.
02-27-2013, 10:23 PM
#10
Rennlist Member
Thread Starter
I think the point is that for steel-on-steel you could theoretically torque a 12.9 m12 to ~146nm, at a mere 85nm any downward adjustment for the aluminium (i've seen suggestions around -30% depending on the grade of aluminium) isnt necessary. The other critical factor is the amount of thread engagement, i've seen info that no adjsutment to torque is needed for 6series ali as long as you have say 2x the bolt diameter thread engagement.
Anyway I didn't feel qualified to make the final decision so I think we checked with 9m in the end who confirmed 85nm for all the bolts.
Sensible to check with the suppliers of your bracket though.
Anyway I didn't feel qualified to make the final decision so I think we checked with 9m in the end who confirmed 85nm for all the bolts.
Sensible to check with the suppliers of your bracket though.
02-28-2013, 04:44 AM
#12
Burning Brakes
my first thoughts are 85NM for the adapter to wheel carrier and 95NM for the radial bolts from calipers to the adapter. I think i did so, but my adapters are made from steel...
regards
regards
02-28-2013, 09:24 PM
#13
Rennlist Member
Thread Starter
