I just spent half an hour trying to find the famous HKS FCon pro pro pro thread as that had a great graph on it ( rolling road operator: Cem ;):D)

Warning: this will only make sense to our (much) older members

Are you suggesting that the rollers may be over reading a "touch" :norty:

IMO the only way to conclude this is a run on a different set of rollers because, im not sure if i read this right but someone has already mentioned that the rollers Big D's car was run on may actually be in question.

It doesn't IMO need to be concluded, he ran the car on two seperate occasions at 382bhp. He runs 11.8 on the quarter mile, the power obviously isn't that far out. Yes the AT and ITs are quite different, but if as said his heatshield isn't doing a good job, it's to be expected. I would like to see a pic of said heatshield though.

My Powerstation proven 373bhp VF35 Newage STi ran a 12.2 at Santa Pod, so I would say that minus the 200kg of his classic, his times make sense for the power his car is running. All this saying to run it elsewhere etc is not needed. Rolling roads are never exactly right anyway so let's say it's around 380bhp and leave it at that.

Hmmmm, have you a copy of the plot you can pop up i would like to check the AT and IT readings because i believe you claimed result may not be accurate! :D

I run 20% meth - hence the power

Meth is overated with a VF35 mate, what you should of done is port the W/G and fit a new actuator, everyones doing it! :D

In all seriousness, before this thread it was something I was contemplating due to the compressor surge. Either that or welding it shut and going external wastegate style. :D

I'm keeping an open mind on this one.

I don't believe there is a problem with the rollers at S4U or the way it is operated. If there is any problem it is deep in the DD software where it does the calculating back for the IT / AT. I think all DD rollers would give the same (as near as damn it) results. Whatever calc it uses is obviously consistant as it came up with the same bhp figure even when the IT was brought down by the extra air-flow.

However, I run a VF35 on my classic (2.1 stroker) and have been looking at new turbos as all the past history of these says it runs out of puff at 340 bhp. In my head I know this to be true,but in my heart (and wallet) I would love to see a VF35 running a genuine 380bhp.

I think a heat-shield and ducted air in will be required before any further rolling road sessions should be done. If the IT can be brought down to a few degrees above AT, and maybe just for arguements sake use a different rolling road, then a definative figure could be presented.

Do you have any gauges in the car ?:)

:top:

:lol::lol::lol::lol:

What's so funny?

Yes I have Defi's in the car.

aids on a plane

this has been light relief compared to the other thread..."13 hours to fit gauges"...thanks for the entertainment folks.

If a vf35 maxes out at 340- 350 bhp. Can someone who knows what they are talking about tell me what a vf23 maxes out at.. Cheers John...

A good vf23 will see the sunny side of 330bhp :)

Kinda punches a hole in the OPs claim then ...

TX.

And a really really good vf23 makes over 360hp!

Can someone please give me a short a simple answer to the car making the power? lol

The OP made 382 & 382............my brain is hurting reading.

Steve

Having read many threads like this on here and on MLR, a couple of things are readily apparent. You like it when your car gets a headline figure on the dyno (and want to believe it) and don't like it when it's lower than you expect (and look for a getout). And secondly the estimated ATF figures are complete horsecrap (unless measured on an engine dyno). Does anybody seriously believe that you can take the ATW figures and add around 25% to get 'real' ATF figures. Especially as there is very little consistency between the people making these 'estimations' and generally speaking the more generous they are then the more they entertain their customers. So no incentive to inflate the figures there then? The ATW figures are the only ones that really carry any weight on a rolling road.
When I bought my last car it came with dyno printouts showing 465BHP ATF and 450ft/lbs which having since done some research with the spec I have is simply not possible as although the overall spec is very good the car currently runs a TD05-16G. Having since had it mapped and dyno'ed it actually got 355ATW with 400ft/lbs. The ambient temp was 40degrees and my printout gives an estimated ATF figure of 400BHP which is probably far more realistic. With an ambient temp of 20degrees the car may have made 375ATW which is pretty much it as far as the turbo goes.

Why is it all these dyno sessions provide printouts giving a headline figure that simply cannot be proven without ripping the engine out and putting it on an engine dyno?
They should just focus on the wheel power and there would then be some consistency in the process. And less dreamers.

Kevin

lol 16g FTW !

What is FTW?
Not a Subaru by the way.

Kevin

for the win

My TD05 20G made 500/500 running on 95 ron :p

;)

Would that be on a 2.1 :D was really impressed by that graph!

evos will always make more power than Subarus.

Wouldn't be so sure about that! Don't see many sub 9 second or 210+mph Evos around these shores ;)

Again I did not mean to sound rude here but it is getting a little boring now, I totally agree and to be honest I do believe that what figures I have are correct if not exact they are very close to it.

It was mentioned earlier that I was arguing with some of the finest Subaru tuners in the country, I know this and I am not stupid do you think I would dare argue or try and fight my corner if I did not believe that what I have here is correct or close to it, if I had any doubt in my mind I would have gone away and shut up at the earliest opportunity. By standing up for myself I mean no disrespect either. Is the man that mapped my car not regarded as one of the finest Subaru tuners in the country and said what he had to near the start of the thread.

Cheers Iain

I've been following this thread for a while and I'm still on the fence. Pretty much everyone has made valid comments whatever tone or aim was behind them..

I've been trying to find a compressor map for a VF35 and lucked out. Has anyone actually proven their maximum air side mass flow rate range?