If the PPP backbox worth getting for an upgrade on a MY00??

 

Yup.
It's a little quieter on a decatted system than the WRsport oval box but it still makes for a good noise under power I also prefer the round pipe, which is why I got one and sold my WR.
Performance wise, no idea.
You can pick them up occasionally in For Sale for about £150 - £200 depending on age/condition.

 

It is restrictive, but it is the only one I could live with on a decat system.

 

When you say it is restrictive do you mean it isn't as good as the best on power,or it's worse than standard ?

 

It is way better than standard, but makes a whoosing sound (some say like an F15 ) under high load which is the hallmark of a restrictive exhaust. I quite like the sound, and it does come alive when you boot it. I am running quite a lot of airflow, so on my car it probably is restricting it more than some others. However, it makes a decat system on my car quieter than many cars with just a backbox, so overall I gain for my tolerated noise level - otherwise I might need to put the OEM downpipe back on and that is a truly evil creation like the original uppipe which is simply horrendous.

 

Will a Subaru dealer sell you one of those (i.e. round pipe) as my dealer offered me a WR Sport oval one. I prefer the round. Is it compatible for a non PPP car ?

Yorkie

 

A dealer won't sell you a round one as they only come as part of the PPP. The oval WR jobber is the only one you can officially get through a dealer.
Like I said, keep an eye on the For Sale section: that's where I got mine from.

 

...and so did I.

Any ideas how much power it liberates over standard ? 5-7bhp ?
It sounds quicker !

 

I'm sure it does something performance-wise but I've no idea what. At the least the sound makes you feel like you're going faster

 

In all honestly it is probably much much less than 5-7 BHP. Maybe a downpipe might give you that. I am being a little conservative perhaps

 

I think I'd go as far as saying there's no actual extra power (as in peak), but what there is (or rather was) is there for longer - the 'power band' is wider so overall you get more go out of it.

I'm obviously having one of my not-so-clear days, so I think I'll get my coat...

 

Look at this power run.
The PPP kit also includes a modified STi ECU, and an ST15/P1 decatted centre section and Intercooler piping, as well as the back box you fancy.
The run shows a car with out the ECU but the mechanical bits in place.
http://dyno.scoobynet.co.uk/uk/jason_jarvis.htm

Cheers MTR



[Edited by MTR - 5/16/2002 12:44:39 PM]

 

IMHO, you'll only notice backbox restriction differences once you've decatted the downpipe....only then does it become the biggest restriction (I can't tell the difference between a catted centre and resonated centre on my car).

Richard