Hello peeps ive just put my decat system[H&S..on a my 96 wrx].on the original downpipe with cat theres a small probe beneath the cat[ive been told this is a cat preheater..is this true??]also does disconecting this affect the ecu in any way?...im a little confused becuase the car dosent seem 2 go any diffrent than with OEM exhaust on it[appart from the truely awsome new sound]i dont think theres anything wrong with the car becuase it goes like the clappers....last car was mr2 turbo and its abit quicker than that......should i reset the ecu do u reccon?....suggestions

 

You should notice a better spool up. My car (with de-cat & fs) was a lot better (more responsive) at lower rpms. I really noticed when switching back to catted D/P for MOT.

Probe is 'cat on fire' sensor. It is there to put up a warning light on the dash if the temp of the cat is at a level detremental to it's health. Leaving it out of the equation is not a problem.

 

ok thanks jameswrx....also big thanks 2 H&S for a lightening delivery and good service.;}wicked sounding zorst;]

 

still abit perplexed by the lack of improvement spool up time seems the same. a m8 did it and his turbo used 2 kick in earlier?[2500rpm i think].

 

however ive noticed it pulls all the way right up 2 red line without the droppoff at about 6250rpm that it had with OEM zorst.but this isnt realy that gr8 as i dont like stck it near the red line anyway.anybody else had meagre gains from a decat???

 

Reset your ECU!

 

Have u got an induction kit or panel filter ?

Decat is a good exit breathing mod, but ideally you need increased air flow in as well as out.

Green panel filter is meant to be good value and wont give u induction/MAF headaches.

I have a K&N inducation kit and a full de-cat, but cant say the turbo spools in a 2.5k, its more like 3k - in boost between gear changes improved once I got a decent DV in as well...

Next step is a scoobyecu to take advantage

 

yeah ive got a jr panel filter in it, standard dump valve......im on the waiting list 4 a scooby ecu..new year im hopeing.