| Author |
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Jason Vance (Jason)
| | Posted on Friday, June 07, 2002 - 07:51 pm: | 
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Okay, it appears there are a few companies selling a conversion kit to run vented rotors for the Discovery; however, it does not appear that the spacers required to allow a vented rotor to be used with the stock caliper are available seperate from the (expensive) kits.
1. Has anybody found an outfitter that is willing to sell these spacers independent of the kits? If so, how much?
2. If not on #1, does anybody have access to CNC machining tools to recreate the stock Disco caliper spacer, but using thicker stock to enable the use of vented rotors?
3. If not on #2, if I could find a machine shop willing to make both front and rear spacers to allow for vented rotors, would anybody be interested?
I'm not looking to do this tomorrow, or even next week, but my Disco will eventually need new pads and rotors and I'm not about to spend the money for solid disks if I can find a feasible solution for vented disks (both front AND rear).
Since the topic of vented rotors has popped up a number of times in the last few months, I figured I'd drop this hook and see who bites. I'm not looking to make money (yet), but this is a simple solution that surprisingly hasn't been tackled stateside yet... |
Jason Vance (Jason)
| | Posted on Friday, June 07, 2002 - 07:54 pm: |
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BTW, and FWIW, new retaining rods(?) would have to be spec'd for the stock pads to span the thicker rotors...or a compatible brake pad set would have to be sourced (I think Zeus sources pads for a Jaguar for this reason...).
Anyway, food for thought; eat up! |
PerroneFord
| | Posted on Saturday, June 08, 2002 - 12:40 am: |
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The vented discs are a larger diameter than the solid so you may have problems with more than the width.
-P |
Jason Vance (Jason)
| | Posted on Saturday, June 08, 2002 - 11:08 am: |
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Are you referring to RRC or 90 (or is it the 110 series) rotors, or both? |
PerroneFord
| | Posted on Saturday, June 08, 2002 - 10:14 pm: |
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I am referring to any vented and any solid. They simply are not the same size. The RRC has an 11.78" diameter front vented rotor and an 11.6" rear solid, as an example.
-P |
Stephen (Lodnirg)
| | Posted on Sunday, June 09, 2002 - 01:05 am: |
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I have just completed this conversion on my 95 Discovery but have not had time to truly give even a short term appraisal of effectiveness. My brakes are not a whole lot better but I am certain that they will have a greater reserve for heat dissipation. Twice in Colorado on down hill runs I have over heated my brakes to the point of non effectiveness. This conversion should do the trick.
I bought just the spacer along with longer caliper bolts and 8 new caliper seals from Autoland 4x4 in England (WWW.4x4service.co.uk). I got my ventilated rotors which are also cross-drilled and slotted from Great Basin Rovers (WWW.greatbasinrovers.com) The rotors you will need are those fitted to the front of RRover Classic from 90-95 which had ventilated rotors, some RR Classics where not ventilated. These are the same diameter as my Discovery but are thicker. The disc pads needed, which I got from Great Basin, are those to be fitted to your stock Discovery.
While there, I converted to SS Braided brake hoses, repacked my wheel bearings, and and performed a general inspection which found a potentaly serious problem with my hub. I also changed to new rear pads and rotors which are slotted and drilled, but not ventilated.
I hope this does the trick and that you find this information helpful.
A word of caution to those who claim to be mechancialy ignorant, This my be above your abilities and after all this is your BRAKES. |
Stephen (Lodnirg)
| | Posted on Sunday, June 09, 2002 - 01:23 am: |
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I forgot to say:
The needed pad retaining pins are the ones needed for the RR Classic's front calipers.
The spacer kit cost about $130 shipped overnight.
The other parts can be sourced locally and you can spend a little or alot.
For the rotors, pads and retaining pins, I dealt with Great Basin Rovers and was very pleased with their service and prices and products.
I sourced the SS braided hoses from Expedition Exchange.
Perrone, The front discs, ventilated on the RR Classic and the solid on the Discovery are the SAME diameter. Their thickness is different and this requires the spacer. |
Stephen (Lodnirg)
| | Posted on Sunday, June 09, 2002 - 01:27 am: |
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I forgot to say:
The needed pad retaining pins are the ones needed for the RR Classic's front calipers.
The spacer kit cost about $130 shipped overnight.
The other parts can be sourced locally and you can spend a little or alot.
For the rotors, pads and retaining pins, I dealt with Great Basin Rovers and was very pleased with their service and prices and products.
I sourced the SS braided hoses from Expedition Exchange.
Perrone, The front discs, ventilated on the RR Classic and the solid on the Discovery are the SAME diameter. Their thickness is different and this requires the spacer. |
Jason Vance (Jason)
| | Posted on Sunday, June 09, 2002 - 01:45 am: |
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Thanks for the info Stephen! That's what I wanted to hear...there is a source for the spacers without needing to buy a complete kit!
Perrone, are the diameter differences you are referring to with respect to just comparing the front vented to the rear non-vented rotor? If so, thanks for the info; if there is a clearance problem with trying to modify the rears for vented, then probably sourcing a different caliper would be the solution. Otherwise, I'm going shopping for the front spacers! |
Stephen (Lodnirg)
| | Posted on Sunday, June 09, 2002 - 11:04 am: |
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Jason, I know of no one who modifies the rear calipers to fit ventilated rear rotors. To my knowledge, no LR model came with ventilated rear rotors and so a rear ventilated rotor would be one-of-a-kind and expensive. By far most of the braking is performed by the front brakes which would mean that super rear brakes are over-kill. |
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