Hoppy

Low! (Sorry, private joke.)

Edited to add I agree with R19KET. No two dynos are ever the same for loads of reasons, and one-off runs can be pretty meaningless in themselves. But before-and-after mods runs on the same dyno under similar conditions can tell you quite a lot.

Richard.

[Edited by Hoppy - 6/4/2002 2:12:16 PM]

Rottie1

Whats going on there then.??

i am going to see them (powerstation) tmorow to discuss mods for my MY99 UK wagon (any advice welcome) car is already decatted.

Powerengineering results are 30-40 bhp more for similar mods.

Powerengineering better tuners or r/r optimistic. Pstation tuned my cossie b4 scoob and thought the power on there rollers was lowish.

Any thoughts

Rottie

rr_ww

Optimistic Rolling road i'm afraid. Why they don't get it calibrated properly I don't know as all it does is lose them credibility!

Richard

Trout...

But stangely - both RRs mentioned seem to produce reasonably standard figures for standard cars.

Strange that isn't it

Trout

R19KET

Since we have no way of accurately determining which is the more correct of the two, I suspect, that reality falls somewhere between them.

If you had an STi, running a hybrid turbo, 1.5bar, Motec, water injection, full decat, and it got 304bhp, would you concider that to be high, or low ?

Mark.

Trout...

Hoppy,

I don't know - I think 304bhp could be on the high side

Trout

Hoppy

Shudupp fish-face We'll see

Richard.

PS Who has the most optimistic dyno in the UK?

Floyd

iTrader: (9)

Trout

I disagree, my car showed 201bhp at PS and they thought that was normal, but at PE it showed 233bhp and they thought that was normal too!

Hardly the same!

F

DeanF

iTrader: (1)

My Bro's was 294 Bhp 240 Ft/lb at Power engineering. At powerstation it was 265Bhp & 218 Ft/Lb. He was most disapointed at first & thought his car was on the way out, Until he had spoke to others who had been to PE & had simular results when the Dyno'd else where.

Dean

EvoRSX

My friends Evo 6 showed 351 bnhp at Powerstation and 353 bhp at PE so I can't see much of a difference in that.

Like people say, there are so many variables that affect engine power outputs (air temperatue, humidity, air pressure, wheel slip on rollers, method used to calculate transmission losses etc etc etc) that it is very unlikely that you will get identical results from identical rolling roads.

If people are saying that PE's is optimistic perhaps it may be that PE have a better arrangement for providing cold air to the engine, perhaps the wheel slip on Powerstations rollers is greater.
There are so many variables R/R are really only a good indication of before and after modifications carried out within a short period of time.

One of the better ways of comparing R/R figures is to look at the power at the wheels figures as this removes the inaccuracies of calculating drivetrain losses.

Andy

mutant_matt

Mentioning wheelslip, I've been to PS a few times and it seems quite a common occurance to get 1 or 2 people to sit in the boot to stop wheel slip. They don't need to do this @ PE so perhaps there is some subtle wheel slip @ PS which lowers the figures? (or does that increase the figures? )

Matt

john banks

And do they stay in the boot during the coast down run? Shut them in there and blow up the whole lot including the rolling roads I say they just cause trouble Oh I love rolling roads. Nice to map on one if only so you can hold it at one load point and not worry about mad drivers getting in your way when you are trying to do 6800 RPM in 4th gear , but then you have to go out on the road and do it again. Nowhere near for boost control using the rolling road from what I saw. Anyway, I am sure PE was rigged to stop me beating Steve Done's figures even though I could just haul him in on the road, especially at the top end, but he did not dare run on the same day to see (we ran out of time actually and he had run on a colder day before, now we exchange Delta Dash logs with runs in 3rd gear and argue about the benefits of a turbo or a manifold ). If I win the excuses are that I live in the arctic, run more boost and that my MAF sensor reads higher because I don't have a mushroom in my wing. Haven't lost yet, so I've got time for some excuses