Titanium Pad Backing Plates - Who Has Used Them?

[ferni]

Ok, I *think* the sumitmo calipers on the GTR take pads from FMSI D647 (same as 300zx?)

And the Brembo Calipers on the GTR take pads from FMSI D639....

[BHDave]

from ferni's first link

Different materials coefficient of thermal conductivity

Air 0.025

Aluminum 220

Titanium 7.4-22.0 (Depending on alloy and temp) Usually roughly equivalent to Stainless Steel.

Steel 46

Stainless Steel 15

Copper 401

Concrete 1.0

Glass 1.1

Rubber 0.16

Wood 0.04-0.4

Cork 0.05

Ti and stainless steel are roughly equivalent. What are the factory ones made from?

I call magic beans. get some hardwood pads

[Beer Baron]

they sound pretty good to me.

[ferni]

I call magic beans. get some hardwood pads

HAHAHAH, wood! Pitty about the 'catching on fire temperature' part

[Beer Baron]

definately magic beans, but the price is right!

[ferni]

definately magic beans, but the price is right!

Did you order some richard?

[Beer Baron]

actually that's a good point. If we order a few postage should be a lot cheaper.

so anyone want some?

[ferni]

Yep, but since shipping is $20, we'd only save $10 each, and then to ship from you to me would cost that. Plus i'm thinking i want them before PIARC on the 20th.

[Bass Junky]

Somebody get me some drawings and I can get them cut up, in whatever thickness and material you want.

How would determine the effectiveness of the different materials?

[ferni]

Read the 2 links i posted Pete. It explains it a little. But you're the engineer, i'm just a computer geek.

[Beer Baron]

sounds good, but I reckon buy the time we buy some titanium sheet in the right thickness, then your time to cut them out, and we need 2 per caliper I reckon even if you did it at cost and donated your time free it would be a $100 proposition. what do you reckon pete? I don't even know anywhere that sells titanium sheet.

[Bass Junky]

It's not what you know

[Beer Baron]

lol, and I don't know much to begin with either.

alright, I'll hold off on sending my money to seppos for the moment. If I'm not too lazy tonigt i'll trace out one of the factory brembo shims for you. and if you feel inclined sus out what Ti sheet is worth. I'm not sure on thickness? maybe 1mm or 1.5mm.

[ferni]

I think it's going to end up costing about the same Richard. So we might be better of ordering from the states... but we can wait until tomorrow to see what Pete and Troy come up with...

[Beer Baron]

sounds like a top plan to me

[Bass Junky]

Bass + Bris = on the case

[Roy]

Here is the thing people. You need to be sure you are getting the correct grade of titanium.

I have a little backing plate that i drew up because i was going to do this for my std caliper. There are a few little touches i added to mine that are different to theirs. The reality is you are talking bees dicks here but if there are a few tweaks that add to the thermal capcity of your brakes then you can get a lot out of them. You only have to look at production cars and see how hard they get punted and appreciate that there std equipment is often worse then what Nissan gives our Skylines.

So the reason i didnt go through with this was because i couldnt find the right grade of titanium, one with plenty of vanadium in it. But that came back to mostly care factor, i just didnt have the time or interest to see it through.

I also had my calipers HPC coated with the pistons coated in the same treatment as used on exhaust housings and manifolds. Again , probably a small gain...but a gain none the less. I know for what my brakes have held up well on the track.

You could also be a real die hard and try to run different caliper pistons, but that was just hits and giggles. You would have to be mad to take that upon yourself as you dont want to be R&Ding this sort of caliper mod on the street or track But again, its something that could be done to a std caliper...but lets face it...at this point the sloppy / shitty std caliper will be deflectings its little heart out giving you crap pedal feel well before these sorts of lengths give you any real benefit

[Roy]

Just quickly, i have always had an idea that i wanted to try but never measured. If someone has soem new pads arounf can they measure the total depth of the pad and the the available space between the rotor face and piston when fully retracted

[ferni]

Just measured brand new DS3000 pads for you.

~9mm of pad

~5mm of backing plate

~14mm of pad+backing plate

You want to run thicker discs Brisby? Doesn't SK already do that?

[ferni]

So it looks like the correct FMSI for GTR Brembo's up front is D647. takspeed have this listed under their D960 shim.

http://www.takspeed.com/tispeed/index.php?...;products_id=40

PDF of the shim D960 Shim attatched to scale, i checked it against a set of my pads and it looks right.

Think i'm going to order a set of these. Hopefully get them before PIARC on 20th.

brakeshim_D960.pdf