from what i was told... the stock master cylinder and pump can still support Spoon 4pot....just abit kureng la.. better to upgrade...but the stock ones are still useable...
my suggestion is... since u gonna make a custom bracket anyway.. how about u sell the 2 pots u have to the proton fellers.....and get yerself skyline R32/R33 calipers with 282mm rotors and custom the bracket.... the 4pot calipres are aluminium and about half the weight of the EK9/BB1 caliper....u can also get the silvia calipers...they are smaller than the skylines but are cast iron so they are heavier...but still lighter than EK9/BB1 calipers by about 3-400 grams iirc....
if u get the stock skyline rotor with caliper.. too big for 15" but if u get the stock silvia rotor with caliper can fit...coz the silvia rotor is 280mm.....skyline caliper + prelude 282mm rotor can clear 15" depending on rim design and offset... got a couple of friends who had this setup.
hurm... rim to clear 4 pot.. that is the major problem
no budget to get new rim for the moment.....and the 2 pot i got is evo 4, unless they got the evo 4 knuckles, else even proton or real evo 3 still cant pnp the caliper,still need make bracket...they will not get mine instead they will get evo 3 direct pnp (what i think la)..the 4 pot i can get it easily
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just from my calculation....if i fabricate bracket only cost me around inside rm600, the e4 2 pot is previously on my wira evo, already got mkt pads, i got myself new e3 rotor, and caliper service kit..so what i need pay is the bracket and might be 4 new caliper bolts....
if upgrade 4 pot, caliper and disc cost rm500,reskim + new pad rm350+- , service kit cost remain unknown , bracket fees rm600+-, rim rm1000+- (replica).....standby bout 2k ... do u think this worth sifu?and still dunno the current steel brake lines fit it or not...
arghh .. head blown
... not forgot to say gonna get the new racing clutch and lsd 1st before the brake upgrade...current exedy 4 puck slip on 1st and 2nd gear already... ogura single plate and exedy twin plate (all are used unit, but will sent to Brclutch to "overhaul") ,dunnoo choose which 1, single plate scare it wont hold when i boosted 1.5 bar (probably over 350whp)...twinplate scare the exedy made it wont last long when i daily drive