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Author F.kin rolling roads
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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25th Mar 04 at 21:47   View User's Profile U2U Member Reply With Quote
Spent all day on a rolling road setting up the car, and at the end of it, cos its playing up, it gave me less bhp than we had 2 years ago. Even though now we have full race cams and it hit 9100rpm, as against 7800 2 years ago on road cams. £600 quid it cost
vibrio
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25th Mar 04 at 21:48   View User's Profile U2U Member Reply With Quote
dave17
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Registered: 3rd Sep 02
Location: Greater London
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25th Mar 04 at 21:48   View User's Profile U2U Member Reply With Quote


what u get 2day then?
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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25th Mar 04 at 21:49   View User's Profile U2U Member Reply With Quote
165
Joff
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Registered: 17th Oct 00
Location: Cambridgeshire
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25th Mar 04 at 21:50   View User's Profile U2U Member Reply With Quote
But don't you know what the problem with it is?

Surely you should use a rolling road more for engine diagnostics and setup rather than for determining power?
Rolling roads are only accurate if they're calibrated - the only way to properly measure the engine's power would be to run it out of the car.

BHP is just bullshit
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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25th Mar 04 at 21:52   View User's Profile U2U Member Reply With Quote
how much torque this time and 2 yrs ago?
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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25th Mar 04 at 21:52   View User's Profile U2U Member Reply With Quote
Yeah, I know. The car is set up well now, and is still pulling hard at 9100. Thing is, you start to get scared at that point and back off with caution.
broster
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Registered: 6th Dec 02
Location: Drives: E39
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25th Mar 04 at 22:02   View Garage View User's Profile U2U Member Reply With Quote
so what was the final result 165? u were hopeing for 200 wernt you
Keith Piper
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Location: West Sussex
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25th Mar 04 at 22:04   View User's Profile U2U Member Reply With Quote




Ignore all the readings. The blue line at 45 degrees is the power. The rpm at that point was 9100. Because the rolling road could not be set to agree with the engine rpm, all the figures are way out.
3CorsaMeal
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Registered: 11th Apr 02
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25th Mar 04 at 22:06   View User's Profile U2U Member Reply With Quote
i'd get a standard AX GT instead
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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25th Mar 04 at 22:08   View User's Profile U2U Member Reply With Quote


2 years ago
vibrio
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25th Mar 04 at 23:05   View User's Profile U2U Member Reply With Quote
look at the Wheel power 2 years ago it was 88hp today it was 113hp that an increase of 25hp. however can you be sure the same load was applied each time. I take it you were mapping it
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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26th Mar 04 at 18:08   View User's Profile U2U Member Reply With Quote
I didn't map it. That was done by SBD. Since the original set up, I've changed the standard box for a straight cut Quaiffe, that's why the drag's less
vibrio
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26th Mar 04 at 20:33   View User's Profile U2U Member Reply With Quote
so all you;ve done is fit cams with no mapping then
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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26th Mar 04 at 22:04   View User's Profile U2U Member Reply With Quote
No no no no. It has been fully mapped by Steve at S.B.Developments. Took 4 hours this time
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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26th Mar 04 at 22:06   View User's Profile U2U Member Reply With Quote


DEARY ME!

Kieth.....do you realise HOW INACCURATE those rollers @ Minispeed/BHP are mate? They are absolute POO!!

Go and run ur car a decent set of rollers, like Power Engineering in uxbridge and get a REAL readout.

Just to give u an idea.......my car......ran 118.5bhp and 174lb/torque @ Power Engineering.

A month later, with no mods to car, i got a free run on the same set of rollers u've done urs, and it gave me 102bhp, with 144lb/torque!

On the same day, a GTi 106 with induction and full zaust ran, and got 121bhp.

The whole day was a shambles......results were all over the place. The next time the same people went down there, they got totally different results!

Matt
Adam-D
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Registered: 11th May 02
Location: Cheshire
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26th Mar 04 at 22:34   View User's Profile U2U Member Reply With Quote
so the rollers are shite

i have no idea just felt like posting

i rekon power should be up
but.
what the fiucl do i know
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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26th Mar 04 at 22:42   View User's Profile U2U Member Reply With Quote
Well now. This cheers me up. I did wonder how I could lose 35Nm of torque by adding 1 degree of ignition to it. They couldn't even get the rpm right.
Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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26th Mar 04 at 23:28   View User's Profile U2U Member Reply With Quote
Why on earth did you pay them £600 for such a shite service?
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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27th Mar 04 at 15:03   View User's Profile U2U Member Reply With Quote
Rolling road was £150+vat, for 3 hours. The expensive bit is SBD at £80+vat per hour, (4 1/2 hours)
vibrio
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27th Mar 04 at 15:04   View User's Profile U2U Member Reply With Quote
me thinks you should take the car to owen developments
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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27th Mar 04 at 15:12   View User's Profile U2U Member Reply With Quote
?
vibrio
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27th Mar 04 at 15:18   View User's Profile U2U Member Reply With Quote
they mapped andy's car
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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27th Mar 04 at 15:27   View User's Profile U2U Member Reply With Quote
I think it's mapped O.k. I just think the figures are shite. I know of a similar spec car, with slightly less don to it, that gets 185 brake. I also think I need a smaller exhaust cam, to get the power to peak earlier.
Siberia
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Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
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27th Mar 04 at 16:39   View User's Profile U2U Member Reply With Quote
could be dumb here but surely more revs = more BHP no?

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