dbasteve

Yeh! I deserve a beating over this one! We haven't had an oportunity to convert this disc yet. We have added the 909 to our 4000 series list, which will be available in a heat treated spec a about two weeks.

We/you would have to organise this through a reseller. We aren't setup for direct sales and it may upset a few people to say the least. I can check with a couple of resellers if you like.

You need a lot more than 80 deg C to achieve the necessary changes in material structure.

If it is done properly, Yes it can make a difference in racing applications. For the street; I don't think it's as much a benefit. I assume you are refering to the article in "Zoom" a few weeks back. http://pub169.ezboard.com/fdiscbrakesaustr...rakeclinicfrm24 You can email me if you would like a more in depth explanation.

I haven't done it myself. I am told that you need to replace the struts, but I can't see why unless there is a unusual clearance problem. The offset is the same but the R33 GTR rotor is 30mm instead of 32mm. If your in Sydney you are welcome to borrow a sample rotor over the weekend or something. You would need to check out the R33 caliper or it may be more ecconomical to use a radial mount Brembo of similar spec and have a bracket made. There are quite a few good Brembo calipers that aren't too expensive. The AP's and Alcons are excellent but quite expensive. Do you plan on doing this upgrade yourself or having it done in a workshop? DBA 5000; There isn't enough clearance between the caliper and hub to allow a conventional two piece design on the R32 GTR rotor. It can be done using a castle drive system which is very expensive to do correctly and you really couldn't justify the cost over an R33 upgrade.

I'm doing my best to push it through! For every one disc we tool up for or rebuild we get 10 more requests. :eek:

Not half as confused as I was sifting through this mess. O.K There are two 296mm discs out there; 1. DBA 926 = 296mm x 32mm R32 GTR RB26DETT (Soon to be listed as DBA 4926) 2. DBA 4963 = 296mm x 30mm R33 GTST RB25DET 3. DBA 908 = Rear for all non Brembo brake kits for R32 to R34 GTR and GTST a. All of the above are Skippy rotors (K/Paw) b. Your car will be the DBA 4963. The catalogue is wrong as the 32mm rotor only fits the GTR. c. There is one other oddball GT with 310mm rotors. I haven't seen one in Australia yet. All the above discs are in stock. We decided to only make the new front Skyline rotors as 4000 series rotors. Considering the application, there was no point making stock standard product to compete with imported chinese product. The prices haven't changed but if you order a DBA 963 you will get a 4963 which is our premium one piece GTP and Rally class rotor spec. I hope this helps clear things up. Even though I've probably added a bit more to the confusion with the last bit..

In regards to the 909; The 909 has been around for a long time and is a very heavy duty disc. To change it over to the new skippy design would enable us to reduce the weight of the disc and maintain or improve stability and strength. The pillar system offers a better distribution of support between the two braking surfaces and more surface area for better cooling. I wouldn't say it will make as big an improvement on the 909 as it would for a lighter duty disc but there will be an enhancement.

The DBA 908 K/Paw are in stock, the DBA 909's will change over next production run which could be a few months now. We still have heaps left from our last run.

The castings still haven't been machined. Production is a bit of a bottleneck at the moment because of some big orders going through. I'll keep pushing for this month though. The part number is DBA 963 for this GTST R33 rotor.

The holes and slots in the friction surface tend to add resistance which aids the friction process. Sort of like dragging the sole of your shoe over a steel grate. Its a little difficult to explain as it doesn't really alter the friction coefficient but does aid the braking torque. This added efficiency increases with compressability of the pad material.

Sorry! Missed this question. The DBA 909 is not K/Paw yet. This tooling is due to be rebuilt very soon. Ideally the more disc mass the better the ability to absorb heat energy. This can have other problems if taken too far though. So this means that a standard plain disc has the best heat capacity, but doesn't have the same ability to remove dust and expelled resin during fade. This is where the compromise comes in. The K/Paw (Skippy) ventilation promotes good air flow and stability which helps maintain consistancy in braking. If I had a spare 3 hours I could explain all the parrameters involved. Its all about control of heat input in a very short period of time, heat output in a controlled manner, and maximising stability during this process.

Cross drilled discs are definitely not suitable for track use. Heat and cracking from accelerated fatigue are the major issues. Unfortunately over many years people have been led to believe that Cross drilling is a Motor Sport standard. From the testing I have done a Cross drilled disc will give the shortest stopping distance in an emergency braking situation but are not designed for repetitive heavy braking as in racing or a severe street thrashing. Towing heavy trailers is another No No for the Cross Drilled disc. Cross drilled rotors will always have a place in the market but for the purpose of reduced stopping distances. Quite a lot of guys use these discs for Auto-X overseas which only involves a single heavy stop at the end of the course. I hope this clears things up a bit. Steve

A vented rear rotor like the R32 will perform better especially with a good rigid caliper. I am not aware of any success stories with rear upgrades on your car but this doesn't mean it hasn't been done. If you can check out the caliper issues I have put in an order for some undrilled DBA 908's for stock that you can use if it looks O.K. Steve

I will talk to some people about it and the minimum order requirements. There was a group buy organised in Melb with the WRX club which went well, so it is possible. Steve

We have found 3 different rotors for the R33 GTS worldwide. I think the catalogue needs some fine tuning too. The popular R33 GTS in Australia appears to have the 296mm x 30mm disc with a Min.th of 28mm.

Part Number for the 30mm disc will be DBA 963.

The sad thing is that the guys at Nissan don't know any more than us.

Hmmmm! Confusion. The R32 GTR = 32mm DBA 926 The R33 GTSt = 30mm DBA 9?? (Still Waiting) Fatz is your car a GTR or GTSt? I thought it was a GTSt but your signature says R32 GTR. Our guy that does the catalogue entries is banging his head on the floor because of these Skylines.

The R32 GTR with Nissan calipers is DBA 926 ( 296mm x 32mm). I know who you are! The guy with the fossilised rear rotors.

Not seen in too many parts of the world, the Skyline HCR32 GTS-t was a Japan only model, in Type M spec it has a 2L turbo 6 cylinder, producing 220hp as standard. With a few modifications the stock turbo is capable of producing up to 260hp, in Japan the RB20DET has been worked to 450hp by taking the displacement out to 2.4L, bigger turbos and other modifications. Other Type M features include 4 pot front calipers in the front and 2 pot calipers in the rear, with a curious additional drum brake arrangement for the park brake, Hicas 4 wheel steering system that helps stabilise the rear coming out of the coner, Viscous LSD and a rear wiper. The Type M represents the top of the line of the GTS range. Sound familiar! We could make this a game show......"Name that Skyline":D

I am going to scream!.. Kabab, Do you have the M Spec R32 GTS? If so can you tell me if it uses the Nissan 4 Piston caliper with DB1170 pads? I think this disc could be the 296mm x 30mm disc as per the R33 GTSt Thanks

The R33 GTS has 3 different rotors depending on the spec and the R32 GTR has a rotor for the Nissan caliper and a larger one for the Brembo caliper. The R32 GTS as far as I know only has one disc type which is the DBA 909 fr, DBA 908 rr.

Thanks for your time at the track today guys. We should see some GTSt rotors in December made to your requirements.

The R32 GTSt takes the same rotor as the 300zx as well, which is available in slotted. DBA 909