AE86 Big Brake upgrades

[Slipper86]

Big brakes seem to be the thing with sprinter drivers at the moment. well I thought I would share with you what my friend has come up with.

I have a friend that is a machinist and has built many race cars. I designed a 310mm brake setup for AE86s. he makes a brake to bolt the original sprinter calipers over the top of a 310mm rotor. the rotor is a custom one he orders from DBA.

he said the breaking power is amazing and even surprised him. because its still the sprinters origanal caliper. he said it is a very cost effect way the get great breaking for little money.

[Sprinterboy]

got any pic's of the setup???

[Slipper86]

actually I dont.. I will have to ask him for some.. will get back to you on that.

[cerby]

I'd be very interested in that!!
What sort of changes does it involve?? Is it based on the original strut??
While on the subject do the ae86 drilled and slotted rotors sold by RDA fit aus spec sprinters?? And if so does it make much difference? ie. is it worth just under a grand??
anyway thats me for now
cheers cerby

[Big T]

Does this mean the disk is still only 12mm thick? Or has the caliper also been modified to take a thicker disk as well?

Eddie.

[EVOSTi]

so you use a 310mm disc with the standard caliper? forgeting for a moment the thickness of the disc originally used with the caliper (12mm as mentioned) wouldnt you only be using a small proportion of the friction surface of the disc?

i dont understand the point of this post, your friend is a machinist and whatever, but YOU designed the 310mm brake setup, and HE says its suprisingly good and cost effective. theres alot of "he says this" and not alot of description or evidence.

[Selk]

wats tha DBA rotor part number

[Rex_Kelway]

Evo, Think of it as leverage in reverse, the further away from the rotational centre the more force can be exterted for the same effort.

It matters not how much of the actual disc surface is in use.

The bit that gets Rex is, it seems like a 12mm thick 310mm rotor is the go, the braking force would be great, but heat dissipation nigh on identical (which is bad) Even the Jap thickness discs but at 310mm would not be too rad, because that much heat concentrated over such a large flat area MAY be more cunducive to warping.

That may be why most huge discs are also >20mm thick with much structure to resist warping.

Rex has no problem locking the stock aussie brakes from any speed so the braking power is fine, Its stopping the car hard more than once thats the killer. Thats why maybe a 270mm vented rotor (roughly Elise sized) would be great upgrade for all but the most thrash-en-ist track cars He thinks.


But who cars what Rex thinks...

[takai]

Yeah, with Rex here. The 266mm discs i have in the front of my spoonter are great for even Mallala (as proven by other cars there not mine). With big brake upgrades the two things you worry about is the heat dissipation and the weight (if you are serious about it anyway).

[Hen]

My bullshit-o-meter is going crazy here. It just doesn't sound like this is possible, or if it is that it'd work well. However out of curiosity I'd be interested to see some photos of the setup and hear a little more info about it.

Hen

[45aken]

yes it would work, but i dont see the point of spending all that money when a full FC or skyline setup would only cost a little more, and you wouldnt have to worry about anything.

while were on the brakes topic, did anyone see that brake upgrade for an ae86 on ebay for sale? it was a set of VY SS calipers, slotted/vented rotors and mounting bracket. the guy said to use an R32 cylinder. looked like a good, cheap conversion (commo parts are cheap as chips these days)

[Nim]

Sounds interesting. Anyone got price guides on all these brake upgrade options?

[Rex_Kelway]

My bullshit-o-meter is going crazy here.

Agreed, surely there must be a reason he has 9 less awesome points than even the most bone-headed halfwit jerkoff starts the forums with.

[EVOSTi]

rex, yes i do understand the concept of the increased diameter giving increased leverage (so to speak) im just picturing a disc that diameter would have a larger friction surface (if you understand what i mean) so a fair bit in the center of the disc would go unused, would look kinda strange.
would be really pointless to make up an adapter just to space out the standard caliper, why not when you are going to the trouble of making a spacer make one to suite a more appropriate disc?

[mrshin]

If we put aside the hacksawed and cable tied calipers for a moment, let's think what an engineer might say about a reasonable sized rotor on the standard stub. Also, out of interest, does this setup fit under the standard Sprinter rims? If so, it really must be a fantastic case of

great breaking for little money.