forest172

I know that the gentleman rules from Japan for cars like the EV08 and STI8 stick to a certain bhp for european rulings.

I read one magazine article that the EVO8 in standard form could be outputting more than the quoted 276bhp more towards the 300 mark, but then you have the upgrade of the FQ300 anyway, so why would they do this, is that outputting more than the quoted 300bhp, and so on.

Has anybody rolling road a standard STI8 to see what there car was outputting before the PPP. I heard that even these could be around the 276ish mark, any opinions!!!!!!

STi Paul

Dont know about Evo's, but my STi8 in std trim got 269 bhp, after the PPP was fitted it went up to 314 bhp.



Paul

MrShades

I'd like to see the Dyno that a standard STi8 and straight PPP got those figures on.....

..... I'll be there for a run like a shot.

From experience of other standard and PPP cars that seems about 10% over the top from what most of them actually make - but makes for good pub talk and I'm all for it......

Now, which dyno?

Shades

Gubbins

What do you mean 10% over? That would make the figures: STI std 242bhp and STI PPP 282bhp. I've got an STI PPP and if it's sold as 300bhp I expect it to be bloody close to this, say within 2% tollerance, otherwise I'll sue 'em under trade-description act.

Are STI PPP's really that far off 300bhp? I accept that all engines are slightly different, but surely...

talizman

iTrader: (1)

Utter tripe.

As mentioned above, the figures would be circa 242bhp and 283bhp respectively.

Hardly the 265bhp and 305bhp they are meant to have!

Cars that have made the power you quote have obvious technical or mechanical problems.

p1doc

my sti8ppp got 295 bhp at star performance,that is near enough to 300 for me
martin

MrShades

I'll justify my 10% comment.....

The IM and Prodrive figures for the std STi8 and PPP are 'generous' - obviously. If I were marketing either version, I would take a car, on a cold damp day, to a rolling road that erred on the positive side. I'd then take my proof of 265bhp and 300bhp and stick it in my literature. Job done, everyone's happy.

Now, when other dynos are used by typical owners, they may well see 265/300 on generous dynos - and I admit that the quoted 267 figure for the std is possibly OK for a generous one... However, GENERALLY, many owners on less generous dynos (on warm days for example) are disappointed by circa 10% from the figures quoted by IM/Prodrive. Therefore many PPP cars only get 280ish BHP, and owners are out to lynch Prodrive, etc, - plenty of posts on here.

Getting 314bhp from an STi8 with just PPP is pushing generosity beyond the bounds of reasonable comprehension... and probably is more typically, for many owners on less generous dynos, circa 10% over the top.

All I wanted to know was, which dyno rated a PPP STi8 at 314bhp. It's a good way to get a feel good factor, and probably a good place for a rolling road session, as most people would be happy with generous results.

Now - 314bhp from a PPP STi8 on PowerStation's rollers WOULD impress me. Big time. 314bhp at Well Lane or PE would be different....

Shades

Jza

But you missed the point.... its "Heat Soak"!!!

That's why no one can get the stated figures on RR days (and indeed on any test where the PPP'd car fails to meet the 4.6 secs mark). You ask Mike Wood. He can get 4.6 secs and the 300 bhp "all day".... no one else (magazines etc) can... ..... but thats because he's heat soak free

"Heat Soak" = IM/Prodrives "get out of jail free" card if your car underperforms in anyway.....

Jza

IN THE STICKS

Sorry to sound silly , but what's 'heat soak '?

Dave

adpd

It is where you put your flame suit on and enjoy the barrage of abuse

IN THE STICKS

( R6 CDW )

At a r/r day around 4 eekks ago my car made 301bhp on the rollers thats an sti-8 or 03 if you like with ppp, evojkp made 274 without ppp but a replacement backbox was fitted.

Chris

nellie

temp of charge air,on a rolling road the fans are only rated up to a certain speed,thats why scoobs shold be done with the bonnet shut so the air hits the intercooler at the right place not always at the right speed though!!!!

Jza

Its a mystical freak of nature that happens to any UK STI PPP that has failed to perform as expected (or indeed as quoted)....

LOL

Jza

EvoRSX

Mr Shades,
Every single rolling road will give an ESTIMATE of flywheel bhp.

The only way to measure the true engine output is to get the engine out of the car and put it on an engine dyno.

Until then, you will never have an answer to your question of overestimation by IM or not.

Andy

p1doc

i have been informed that some dealers have generous figures for their ppp due to further development of ecutek software
martin

johnfelstead

The PPP measure the inlet temperature of the air as it enters the turbo, it uses the temp sensor in the MAF to do this.

Prodrive has set the PPP so that when the inlet temp (not charge temp!) gets to 40 degrees c it reduces the maximum boost the engine can run, this is done to protect the engine from det and this is why they can waranty the engine for 3 years without doing a custom to the car remap. Remember this is an off the shelf remap and all engines do differ slightly. If you were getting a custom remap there would be less need for this 40 degrees safety boost cut.

So the important thing for you when RR a PPP is to get good airflow to the airbox inlet if you want to see good power, it is not charge temp related boost cut, charge temp is not measured by the ECU.

The most eficient way to drop the inlet temp when doing a RR is to ram air the airbox inlet and then to run the car on partial throttle for 2 minutes at 2000rpm, this cools down the intercooler from around 70 degrees to 15 degrees, by the end of a power run its going to be back up to 40 degrees charge temp.

Try this and i bet you will see a big jump in power.