hey i posted a thread on here a week or so back 4 advice on making my car faster. I have at present induction kit, dump valve and a stainless exhaust (not de cat)...........can i achieve 300 bhp and if so how much will this cost?!.........cheers people

 

ecu upgrade or a chip in your standard ecu would see up around that fiqure failing that my cars up for sale 313bhp....buying that would put you over the 300bhp

 

hehe tell me more!! nah seriously thanks matey but jus bought this one and i love it as its my first scoob!! YAY....................howd u get ya 313bhp?

 

chipped ecu running 1.1bar
apexi IK
full decat
front mount

 

A 93 WRX comes with around 208/215 bhp.
The first mod is usually a full 3" exhaust system removing the CAT. Ensure you choose a system with proven performance gains. Next would be ported headers and up-pipe.
To go much further you need to alter the fueling, ignition timing and boost. You could use a chip and there is a wide variety available but some give questionable gains and may even cause damage. Unless the chip can be mapped specifically to your mods, even if it is safe, it cannot give optimal gains.
If you know someone that knows what they are doing and with a wide band lambda, then for cheapness you could consider a GBE valve but this is not an ideal solution and not for the inexperienced as it could easily cost you an engine.
Consider a mappable ECU such as a six row Link or Apexi PFC.
If your car has 380cc injectors, on standard fuel pressure these will be maxed out well before 300bhp.

 

so changing the 380cc injectors to what is best? how much are they and are they easy to fit? is the 93wrx the same injectors as an 95 wrx

 

My 95wrx on standard injectors and fuel pressure made 313.3bhp only last month so i have to disagree with your last comment harvey

 

similar result here also. i have 310 @ flywheel (scoobyclinics dyno). 380's and standard fuel pressure?

stew

 

hear goes mate im starting soon to
92wrxtypeRA.

3in H&S decat downpipe
ported &polished std headers
ported &polished H&S up pipe all heat wraped
HKS pluggs
HKS panel filter
Z4 ecu

im hoping for 300bhp but i thinking more chance off 280bhp.will see what happens soon and take it from there

 

Running a Z4 on standard boost i think your 280bhp guess is about right maybe a little more

 

There may well be exceptions to the norm but generally 380cc injectors on standard fuel pressure are maxed out before 300 bhp. If Scoob93 is new to modifying Subarus, he needs to be aware of that. if he is lucky and can get beyond 300 bhp then that is a bonus.

 

Double post.

 

According to the Subaru Impreza Book, the classic WRX has atleast 240 bhp.
Its the UK impreza's that have 208/215bhp?

 

Its PS and not BHP so the actual figure is a bit lower (think its about 232 or something like that)

 

thanks everyone.............and yes im new to modifying subarus!!........is there a major difference in my93 scoob n the later 280 bhp?!