i found this at the top of forced induction profromace in sticky (quick ref guide)......
OBJECTIVE : Do mid 13's(possibly lower) all day with the standard ecu, intercooler and turbo retained on your R33 gtst.
I used:
A 1995 manual R33 gtst with 93k on the clock.
With the following Modifications:
* K&N panel filter inside stock airbox
* 3inch FGK cat-back exhaust (very quiet and probably more restrictive than some exhausts)
* 3 inch stainless dump pipe off the turbo 'wrapped' with DEI thermal tape to the cat. This dump does not have a sepparate wastegate screamer or feed pipe.
* Diff Cradle kit or 'pineapples' , the Whiteline kit No. KCA349.
* Ogura Lightwieght flywheel 4.8kgs.
* Ceramic puck sprung clutch and stock pressure plate
* Wrapped turbo to intercooler pipe (DEI thermal tape).
* Removed panel behind stock intercooler.
* Timing set around 20+degrees advance.
* disable the carbon canister fume feeds to the intake.
* Turbo smart bleed valve (cheap one) set to 10psi boost
* Simex 205/50 16 inch rear tyres. let them down to 19psi.
* NGK coppers ...6ES gapped to 0.7mm.
no one has said it was a bad thing to advance timing 20+ degrees, has he done the same thing that someone did to my car??