smellyvag

Sorry its so long, but its for people who wanna know what a PPP does to a sti7.

Guys, i have just had my PPP fitted and H&S decat pipes fitted, and for those that havent already experienced this, wanted to share first impressions.
The car seems to burble a bit more on tick over and this burble continues till about 4000rpm where the turbo kicks in and it all becomes a bit quicker. It is fairly flat under 3500-4000rpm but there again,it was similar in 265bhp standard form.
The power band has changed and seems to be a bit later on, 5-7500 and it was only seconds before i was bouncing off the rev limiter in 2nd at just over 8000rpm(i think),something i had never done when the car was in standard form.

Bearing in mind PPP raises boost to around 1.2bar(confirmed by boost guage in the one i test drove in dealer).
The car is rapid upto 100mph and you cant help noticing the change in sound. It definately sounds meatier.

The following happened on private track:

I floored the car on a dual carraigeway, powering up through 4th,5th and into 6th. By the time i was in 6th the car must have been traveling over 120mph. Then even 6th was pulling. Before i knew it 150mph on the clocks and i had to back off cause of on coming traffic(amazing what you get on private tracks these days)

No bull**** the car felt like it had capability of reaching speedo limit of 160. I understand this is only what the speedo sais, but it sure felt quick.

Then i slowed down for a while, as speeding is dangerous and the look on my girlfriends face demanded braking.

Overall the kit does make the car faster, but i cant help wondering if it was worth £1995 fitted.

You can tell the car is under considerable amount more stress and fuel comsumption has gone from bad to worse although there is a novelty factor atm. Thank goodness for my 2 years warranty remaining, will definately pay for unlimited upgrade now.

Ta
Smelly

( R6 CDW )

So was it a track or a duel carrage way??

[Edited by ( R6 CDW ) - 5/31/2003 12:41:09 AM]

TonyBurns

iTrader: (3)

So as you said that your running decat pipes i take it your running totally decatted (which with the PPP on an sti is a very bad thing due to boost spikes).
Id put the sports cat back on (the downpipe) if you have removed this as a full decat will invalidate your engine warranty when it blows up
Tony

smellyvag

Yes I am running full decat. Will these boost spike cause me problems? And what are the symptoms of boost spikes?

Gidney&Knowlesy

With a full decat system you will need a small brass restrictor to cure overboosting....

And yes overboosting can cause damage....

Call or mail me for restrictors, I have plenty of those!

MikeWood

Be very careful with changing the exhaust specification. As detailed on another thread, 'removing' the catalyst may not have actually gained you anything in performance terms as we found better results with our sports cat downpipe fitted when compared to a catless downpipe. This is perhaps borne out by your comments that nothing happens below 4000rpm, as other people with the package fitted will tell you, this is not what their cars are like.

The ECU now controls the boost seen due to the exhaust changes slightly differently to a standard car so the boost profile will not be as it's been calibrated for.

Another implication may be problems claiming under warranty in the unlikely event anything goes wrong. I believe Subaru are now inspecting every turbocharged car in the event of an engine related claim.

Regards

Mike

urban

iTrader: (1)

I've had my STI7 PPP fitted for a month or two now.

It definately doesn't behave the way you describe, you have a load of power from 3K ALL the way to the redline. Before the PPP was fitted it sort of ran out of puff at 6K, it continues on quite happily above that now.

I don't think that the £1995 is unreasonable, not for what you get PLUS you still have your warranty.

I suppose some may say that it feels slower, maybe this is because you don't get whiplash at 4K as before, but more progressive power from 3K onwards.

My car definately has more power & torque through ALL gears than before the PPP was fitted, i'm quite happy with mine.

However it's costing me a bloody fortune on fuel, now you are bound to hear stories about the car getting more MPG with the PPP, but excuse me, do people buy the PPP for more MPG or more ooooomph!


Shaun

Pete Croney

Add me to the list of people that would not recommend this.

As Mike says, the PPP on your car has been remapped using EcuTek software and the boost control targets will have been changed to suit the exhaust that it came with.

If you want more out of it, you need to remap the ECU again, to suit the different exhaust set up. When this is done, 1.35 bar is achievable by 2800 rpm and things happen very quickly indeed. Without doing further mapping, the whole set up will not be right.

Whilst it is all do-able, its best to decide whether to stick at 300bhp or go for a bigger output, from the start.

smellyvag

Thanks guys.Going to the dealer tomorrow to get the PPP sports cat fitted back on. The car runs like a bag of s**t and there is a noticeable flat spot between 4000 and 5000 rpm (just where you need a flat spot!!!???)

My opinion to anyone considering decatting a PPP, is dont do it!!!!!

ARRON BIRD

What a ***** thread.
One minute its tops next minute its sh1te!!!!
Why do people do it????
Just leave it as it was intended.
My engine decided to expire and was all sorted under warranty withs thanks to Mike.
( a cheque will do made payable to throbzone peni5 enlargement pills please Mike as I dont have the cash to pay for them )
Hows me springs doing??
Whenever

Danny B

Do what?
Get a PPP or De-cat exhaust?

Chip

Get a Decat exhaust I would imagine.

S/vag.
When youve had it all fitted properly then come back and tell us what you think of it,Had mine for 2 months and think its the biz.
Till then stop moaning about something you managed to ***** up all by yourself.

Chip.

marklemac

Had my PPP fitted for 3 months and enjoy every day of it.

As mentioned above, it pulls like a train from 3k to redline.

And for the record, mine drinks less fuel than before...

smellyvag

Its really just information for other people to learn from. For anyone else thinking off this combination of PPP with decats then maybe they will reconsider. At first i thought the car was amazing but over the last few days have noticed flat spots and hesitations, which no doubt are a result of my bad combination of parts and knowledge. Maybe other people can learn from these expensive mistakes.

russell hayward

I think a significant number of people are having this problem.

There was quite a long thread on it a couple of weeks ago.

MattW

Dave TS contributed to some threads, must be 12 months ago, when he decatted his PPP. Came to the same conclusion.

I'd suggest you post up any potential mods on here, there is bound to be someone with experience that can point you in the right direction.(or save yourself a few quid)

Floyd

iTrader: (9)

S/Vag,

Assuming you've got a UK car you can consider your warranty fecked! If your engine blows up even after being put back to std the history is here for IM to see (Prodrive is already aware).

People stick with the PPP for waranty reasons, I believe that Arron was trying to tell you that in his post.

My suggestion is that you keep the de cat and visit Pete C for a remap to suit your system, thus saving the money on having the exhaust changed instead. IMHO!

Berk!

F