Engine just went pop

andi said:
Powerstation themselves admit it's "designed to measure power at the flywheel" and not accurate at the wheels ;)
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So, by taking all its measurements and readings at the wheels, you are saying its more accurate at obtaining flywheel figures, something which the RR doesn't have any direct dealings with :confused:
 
paradigm said:
So, by taking all its measurements and readings at the wheels, you are saying its more accurate at obtaining flywheel figures, something which the RR doesn't have any direct dealings with :confused:
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So they claim. Seems to tally with the results too, which always seem to be accurate at the fly and off atw. Don't ask me how it works, it makes no sense to me, but thats what they say, and what the results say.
 
Will Gill said:
id be impressed if I get 200 at the wheels, 300+ at the FW and ill be a happy chappy
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I was hoping for 300 at the wheels, but doubt I will get near it, maybe 275-280ish hopefully. As I won't have the LT Headers, Race CATS and X-Pipe fitted in time.

But for the next one they will along with an ALU drive shaft and some other bits, hopefully 330 at the wheels when finished, but we shall see. :)
 
Powerstation has two huge rollers the car needs to drive, one measures the torque applied to it and then the other is used to calc wheel coastdown losses in order to make a more accurate flywheel figure. So the wheels figure tends to be much lower than other Rollers and indeed the power at wheels you experience on the road.

Although saying that PS read 5% over if you ask me.
 
Jonnycoupe said:
Powerstation has two huge rollers the car needs to drive, one measures the torque applied to it and then the other is used to calc wheel coastdown losses in order to make a more accurate flywheel figure. So the wheels figure tends to be much lower than other Rollers and indeed the power at wheels you experience on the road.

Although saying that PS read 5% over if you ask me.
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Ah, thats what PS said, but much easier to understand, thanks.
 
Jonnycoupe said:
Powerstation has two huge rollers the car needs to drive, one measures the torque applied to it and then the other is used to calc wheel coastdown losses in order to make a more accurate flywheel figure. So the wheels figure tends to be much lower than other Rollers and indeed the power at wheels you experience on the road.

Although saying that PS read 5% over if you ask me.
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You've lost me there m8 as what your saying seems to contradict itself?

On one hand are you saying PS rollers should show less BHP at the wheels than your actually getting down to the road but on average still give results 5% higher than other? So in essence all rolling roads give low figures at the wheels just PS not as much?

Is their flywheel figure accurate? How do they work it out as all cars are different? I believe my car loses 12-15% through the transmission from reading the US forums...........
 
Gibbo said:
You've lost me there m8 as what your saying seems to contradict itself?

On one hand are you saying PS rollers should show less BHP at the wheels than your actually getting down to the road but on average still give results 5% higher than other? So in essence all rolling roads give low figures at the wheels just PS not as much?

Is their flywheel figure accurate? How do they work it out as all cars are different? I believe my car loses 12-15% through the transmission from reading the US forums...........
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I believe he means the flywheel figures are still 5% over :)
 
What im saying is the huge inertia dyno they have is designed such that it is more accurate at flywheel predictions and probably more consistant too between models as the car drivetrain etc mass doesnt effect the system mass much.

The system is good for repeatable results and consistant flywheel predictions BUT the wheel figures are lower than other rollers and whats expected from the OEM power figure when you apply typical losses. The PS wheel figure they give is certainly not the power your tyres will see on the way home, as your only driving one bit of road with 1 contact area per tyre.

After saying that they seem to read 5% over anyway but the idea is that the flywheel power is more acuratley measured through costdown measuring.

My teg is 190bhp (158ish @Wheels), they quoted 200bhp and 121bhp at the wheels. Loads of other Honda's when i went had the same sort of trend, 5% over expected but silly low whp.
 
Jonnycoupe said:
MR2 is essentially FWD in terms of losses.
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Aye, with the engine basically being sat on the rear wheels I would expect it to be less than the 17% I lose according to the graph in my sig.
 
Last time mine made only about 4 - 5 bhp short atf of what I thought (made 233bhp atf iirc din corrected), which is as good as bang on really.

Atw figure though was pure comedy and the tranny losses between cars was very inconsistent.
 
[TW]Fox said:
If I was running I would get 210bhp at the wheels becuase I filled up with Optimax last week.
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If anyone pulls out at the RR, I might run just to make the numbers up.

I'm aiming for 350bhp with my speed rust.

Will, really really hope it's just the IC pipe! I'll be stroking that picture all day, as it is a damn nice car :cool:

My fingers are crossed and I'm sure I speak for everyone when I say... I hope to see you on Saturday!
 
Glad your cars ok, in moments of panic when something goes wrong its very hard to think clearly.
Are you moving the intercooler to the front? I remember something about scoobys top mounted intercoolers getting warm from the engine heat?
 
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