I got my 1st ever Scooby 1 week ago, my04 STI and I've done 1000+miles
What a car, it's very impressive, the acceleration is amazing but I don't like having to wait till 4000rpm to get the boost.
So I've fitted an K&N Filter and today I orderd a new Exhaust, decat front downpipe, Magnex or Afterburner Vortex mid and back box (not sure which one??).
I'm leaving the middle section with the small cat in because I've heard that if you take the middle away it mucks up a sensor, which causes a light to flash on the dash.
I am hoping the new exhaust will drop the lag and boost down a few revs,
however I don't think it'll be long before I get the ecu remapped.
Does anyone know if you can get a grill to cover the sti intercooler?? as I've noticed a couple of the fins are slightly damaged
and that's only 1000miles!!!
The handling is great (needs lowered) and the brakes are superb,
fuel consumption is cr&p though

Still what a car

Graham.

 

Welcome to the mad house Graham
Cheers
Colin

 

Welcome to Scoobsville dude - it aint 'alf bad on here!!!

Enjoy

P

 

Thanks Colin.

 

That's what I've heard.

Thanks P

 

A double welcome to someone who knows what "number" his STi is!

As for mods, whew, talk about running before you're walking! Why buy a UK car if you're going to zoink the warranty with a load of mods straight away? Japanese import would have been the way to go there.

Anyway, think you might find that removing the downpipe cat will eventually cause the "cat inefficiency" error and have the check engine light coming on, even if you leave the centre cat in. External CEL fix will be needed in that case.

Grilles/covers/protectors for the intercooler are available, but unfortunately most of them reduce the airflow through the IC to some degree or other, so aren't the best bet.

You should be able to straighten the fins fairly easily with a cocktail stick, pair of flat bladed tweezers or similar. Might also be worth checking that the rubber boot that seals the bonnet scoop to the intercooler isn't touching the fins. Trim it a tiny bit if necessary.

 

So I was right, it is a v10
The car I've bought is a European import but finished to U.K spec with a full Subaru warranty, but hey, I want more fun and power
What do you mean by "cat inefficiency" ??
Thanks for the advice on the IC. I thought a grill might reduce airflow but was worried about the fins, great thought on straightening the fins.

Thanks

Graham.

 

Subaru don't give them numbers anymore, but if you're going to use one, 2004 model year STi's would be version 10's, yep.

Lol, you mean did have a full Subaru warranty. It won't last long the way you're going! Incidentally, more fun isn't necessarily caused by more power. I'd argue that a day's performance driving tuition on a track would add waaay more fun than another 30bhp!

It's the error code that will make the Check Engine light on the dash come on - the "mucking up the sensor" scenario you were worried about in your original post. Removing the downpipe cat will make the readings picked up by the second oxygen sensor go all screwy. The ECU will think the cat is bust (rather than gone) and flash the warning light, unless you apply a fix.

 

Thanks


Greasemonkey.

 

welcome to the madness!!

X

 

Correct me if im wrong Greasemonkey but a remap will fix the cel problem associated with a full de cat??

Oh and could you tell me if a classic scooby has a catted up pipe as i was having this debate with anothewr member who reckoned his RB5 had a catted up pipe

andy

 

Would depend on whether the mapper was able to switch off the piece of code that checked the O2 sensors and calculated the cat efficiency. Thus, the answer to your question is "maybe", but for an authoritative answer you'd have to ask an EcuTeK mapper.

Definitely not. The RB5 has the same exhaust manifold and up-pipe as any other MY99 UK Impreza. The up-pipe has an expansion joint in it (which may be what your mate has seen), but no cat.

 

Thanks rosebud

 

Welcome to invalidate the warranty time. ie you no longer have one
Try a panel filter, the sti one is much better than what you have fitted (ie it doesnt take the air from inside the engine bay )

Tony

 

Welcome to Scoobynet.

How long until you buy an Evo?

 

Thanks, but I've just replaced the filter with a K&N panel filter.

Graham.