going to fit a de cat pipe to my 93 wrx my mate said i will need a set up after is this true

 

No.

 

cheers i will be fitting very soon in that case any idea how much power i will gain i,m running at about 280 300 bhp on a z4 ecu sti turbo 1.1 bar

 

How are you running 280-300bhp already?
The z4 ecu is only rated to 0.87bar boost (260ps).i guess you have a chipped ecu?

Advantages of the decat will be quicker spool up

 

i,m not sure i got the car in august that is what the ad said it will be going on a rolling road how can i check the ecu

 

Im running a my99 stock uk with an ae801, mbc to 1.1bar(td04) and japspeed decat dp and a walbro pump with no setup and all is well in my world.


Power no idea lol above 250 im sure.

 

Standard ecu



Bottom rhs is where the chip will be if there is one.

 

i was told the full spec was 300 bhp with a z4 ecu off the sti td05 turbo running 1.1 bar this is my first scooby so everything is new to me need all the info i can get mate cheers

 

td05 is the standard turbo for a 93wrx and STIs upto STI 2 iirc.
Z4 is from a late 94-96 wrx and is only 260ps (256bhp)

The boost has been upped to a safe level but i would find out HOW the boost has been upped.

 

Std Z4 peaks at 12.71 and stabilises at 11.78psi which is 0.88 and 0.81bar respectively - certainly not 1.1bar.

So, as long as the Z4 hasn't been chipped like myblackwrx has pointed out, you should be producing around 260bhp. If it does have a chip then, yes, it will be running 1.0-1.1bar and this will allow anywhere between about 270-290bhp.

Easy to check: remove ECU from passenger footwell... remove the ECU's casing and check the bottom right position as illustrated in myblackwrx's posted photo... you'd be looking for a rectangular raised black chip there, the same size as the space it sits in...

 

ye'll have tae put a 2 ohm resistor in the o2 sensor switch tae stop the cel light comin on.

 

Isn't that for newage cars though?

 

From what I've gathered from numerous threads about that 'mod' lol on here, then yes.