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Old 28-11-2006, 03:19 PM
  #81  
pete mcrash
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maybe the graph has just evened it out ...i just dont know...is me car still 420 bhp then?????
Old 28-11-2006, 03:31 PM
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here's the revs...not easy on a country road 3rd gear
Old 28-11-2006, 03:32 PM
  #83  
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Originally Posted by pete mcrash
maybe the graph has just evened it out ...i just dont know...is me car still 420 bhp then?????
more like 120 pete haha
Old 28-11-2006, 03:32 PM
  #84  
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sorry it looks shit on here
Old 28-11-2006, 03:54 PM
  #86  
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got a number
Old 28-11-2006, 04:37 PM
  #87  
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Originally Posted by Matt J
Well lanes rollers are reknown for being all over the shop, standard cars seem to make standardish power and all seems well, then you'll get someone with a T34 .63 making something daft like 400+ at 26-28psi

John Nobles rollers seem to be quite consistent and honest, only complaints I've heard about them is that people dont get the results that they expect
So whats point going there too if the figures are still unquantified
Old 28-11-2006, 04:44 PM
  #88  
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tds where do the mlr lads go????? and is that place any good
Old 28-11-2006, 05:00 PM
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Originally Posted by pete mcrash
tds where do the mlr lads go????? and is that place any good
Pete they use a place The Racing Line in Halifax - that is a Dyno Dynamics rd i think, supposedly the best kind but i've never been.

www.theracingline.co.uk
Old 28-11-2006, 05:03 PM
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Pete i wouldn't bother throwing money away at another rollers, you know it goes like shit, my cossy made 412bhp & 350lb of torque, so yours is about right power wise, who cares if the graphs a bit out, get some tippex on it lol...
Old 28-11-2006, 05:07 PM
  #91  
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What does it matter what the rollers say? it is who's in front that matters! LOL

I was gona get mine on rollers next year but not gona bother wasting money if not gona be accurate!

as long as each is happy with their own, then who cares!
Old 28-11-2006, 05:15 PM
  #92  
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hello Ang....just to compare different places,and see if the figures r near
Old 28-11-2006, 06:08 PM
  #93  
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the power figures are usually not that far out at well lane but the revs they make that power at are,as they usually just guestimate the rpm at peak power and the rest of the graph works backwards from that.the torque figures are usually well out as well.
think mine made 263hp and 200lb/ft torque it will spin the wheels in second in the dry and in third in the wet so i think the torque is way more than that.
plus they had to run it in 6th gear on the rollers with three of us sat on the slam panel to stop it spinning when it came on boost.
bryan
Old 28-11-2006, 06:30 PM
  #94  
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we only managed 117 outta the xr2@ 140+mph hows that possible then as it aint shy at getting there either? wasnt expecting more than 125-130 but 117 seemed a tad low,dont care though,loved the day
Old 28-11-2006, 06:47 PM
  #95  
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Originally Posted by DangerousBryan
the power figures are usually not that far out at well lane but the revs they make that power at are,as they usually just guestimate the rpm at peak power and the rest of the graph works backwards from that.the torque figures are usually well out as well.
think mine made 263hp and 200lb/ft torque it will spin the wheels in second in the dry and in third in the wet so i think the torque is way more than that.
plus they had to run it in 6th gear on the rollers with three of us sat on the slam panel to stop it spinning when it came on boost.
bryan
Hmmm, Interesting, Mine will spin in 4th in the wet and 3rd in the dry and I only had 2 people sat on mine, You had the same torque as me but you have 36bhp more than me, Look what happened on the M-way on the way there, I was glued to you but I hit the limiter in 5th.

By the sounds of things quite a few of the reading were out, Still a good day out though
Old 28-11-2006, 07:36 PM
  #96  
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the motorway could of been down to gearing? yours seem to have a short legged box that tops out at 140 in fith? i was in sixth at that point as i usually bypass 5th as its fooked usually jumps out.so went straight from 4th to 6th.it will pull 160+ in 6th. not dissing your car in any way it just might explain why yours accelerates as fast as mine does?

bryan
Old 28-11-2006, 07:36 PM
  #97  
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it's doin' my head in now... it looks like the computer does takes ur bhp, does some maths and then gives u a ft.lb figure, the way the car pulls i felt let down with 370ft.lbs (not bothered about the graph) so i'm going to go somewhere else to c what happens....but by the by it was still a good day...especialy scott in his M3 dropping gears to try to keep up....i just floored it in 5th....bye
Old 28-11-2006, 08:01 PM
  #98  
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Originally Posted by DangerousBryan
the torque figures are usually well out as well.
This is teh whole point i am making. If teh torque is wrong, teh graph is wrong. Rollers can only measure turning force (Torque) and then calculate teh horsepower with RPM from that, using the equasion i gave you earlier.

If torque and RPM are bollox, what chance does your BHP graph stand then?
Old 28-11-2006, 09:21 PM
  #99  
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hi stu
- sorry if this sounds ike a dim question but if the turning force is measured correctly (and this i guess should be easy given modern technology) and there is no slip on the rollers, and the rpm is measured (surely the easiest of all to measure) and the gearing is known, why is there so much discrepancy between rolling roads, apart from 'wanting the customer to go away happy'?
Old 28-11-2006, 09:28 PM
  #100  
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Originally Posted by PGT
hi Stu
- sorry if this sounds ike a dim question but if the turning force is measured correctly (and this i guess should be easy given modern technology) and there is no slip on the rollers, and the rpm is measured (surely the easiest of all to measure) and the gearing is known, why is there so much discrepancy between rolling roads, apart from 'wanting the customer to go away happy'?
Hi Paul, hope your well pal?

The biggest issue, and i am far from an expert on rolling roads, but i am working from common sense here, is frictional losses between the item of measurement and the powerplant.

Tyres, hubs, brakes, transmissions, not to mention the silly coastdown losses some rollers calculate. I saw 395bhp on one

Can you imagine 395bhp lost in heat!!

Of course another issue, and i suspect this is the case in question with some of this weekends graphs, is load. Load, for the newbies can be translated to teh real world as your gears effect on teh engine.
Your turbo car will make less power and boost in first than it does 5th.
Try it and see...

Nasp cars normally fair FAR better on a crap set of rollers than a turbocharged one with a peaky power delivery.

What test car was used for what i call "Crowd Calibration?"
A NASP one as usual?
Old 28-11-2006, 09:39 PM
  #101  
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Originally Posted by Stu @ M Developments
Your turbo car will make less power and boost in first than it does 5th.
Try it and see...
My car with no load feels pants, When I go into the higher gears it feels like it has the power, 1st and 2nd are useless, 3rd is not too bad but once I get into 4th or 5th, Thats when I can feel it the most
Old 28-11-2006, 09:55 PM
  #102  
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hi stu - im fine hope you are too.

why should the engine make less power in lower geras, is this because the load on the engine is dropping much quicker (faster accel) so boost doesny climb, and could this concept therefore be theoretically not true if say the brakes were held on - yeah i know this would also make the rr figures wrong as well!
Old 28-11-2006, 09:58 PM
  #103  
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Originally Posted by PGT
is this because the load on the engine is dropping much quicker (faster accel) so boost doesny climb, and could this concept therefore be theoretically not true if say the brakes were held on - yeah i know this would also make the rr figures wrong as well!
Yes, and this is why we left foot brake a lot when mapping.
Old 28-11-2006, 10:17 PM
  #104  
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stu you have upset pete now lol he thought his car had a lot of pony's pmsl
Old 28-11-2006, 10:27 PM
  #105  
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Originally Posted by Tangodeltasierra3
Originally Posted by pete mcrash
tds where do the mlr lads go????? and is that place any good
Pete they use a place The Racing Line in Halifax - that is a Dyno Dynamics rd i think, supposedly the best kind but i've never been.

www.theracingline.co.uk
yeah it is Craig, they put wires to all your 'under the bonnet bits' and it tells you where there are faults or runnin problems
Old 29-11-2006, 06:00 AM
  #106  
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Originally Posted by Dicko&Sarah
Stu you have upset pete now lol he thought his car had a lot of pony's pmsl
.....yeh but it means ur car is even worse....
Old 29-11-2006, 07:57 AM
  #107  
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Originally Posted by Dicko&Sarah
Stu you have upset pete now lol he thought his car had a lot of pony's pmsl
With 2bar of boost on that turbo he does have a lot of Ponys, but il bet it has far more low down torque than that graph shows.

Pete, next time your in her, do the test i suggested earlier...
Old 29-11-2006, 02:40 PM
  #108  
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i did stu...look up...pritty scarey trying to hold on to my phone and drive on a country road..... anyway the vid looks shite on here
Old 29-11-2006, 02:58 PM
  #109  
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Cant really tell with a vid Pete, but the Tach seems to accelerate hardest and fastest at about 3800/4200rpm.

Is that when it seems to pull its hardest and most vicious on teh road?
Old 29-11-2006, 06:54 PM
  #110  
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Baldy Butch
pretty much straight after our conversation i asked the operator if he could put extra load on the rollers so i can peak more realisticly he replied "wouldnt make a difference as its different to a road ie real situation "

my car is hitting 32 psi again once on the road (little down for some reason)

was still a great day but i would like an acurate reading at some point
Old 30-11-2006, 05:06 PM
  #111  
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Originally Posted by Stu @ M Developments
Cant really tell with a vid Pete, but the Tach seems to accelerate hardest and fastest at about 3800/4200rpm.

Is that when it seems to pull its hardest and most vicious on the road?
stu i know what u mean fella.....when i looked at the graph i just thought wehey 420...370...mint, but then when u look u realise it's shite... i just thought "he's calling my car a puff"...anyway i am going to go somewhere else and try again....we get on well and i'll pop over for a brew at some point....cheers pete
Old 01-12-2006, 08:07 AM
  #112  
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Originally Posted by pete mcrash
Originally Posted by Stu @ M Developments
Cant really tell with a vid Pete, but the Tach seems to accelerate hardest and fastest at about 3800/4200rpm.

Is that when it seems to pull its hardest and most vicious on the road?
Stu i know what u mean fella.....when i looked at the graph i just thought wehey 420...370...mint, but then when u look u realise it's shite... i just thought "he's calling my car a puff"...anyway i am going to go somewhere else and try again....we get on well and i'll pop over for a brew at some point....cheers pete
Is that a home brew then you drunken beer swilling monster
Old 01-12-2006, 09:05 AM
  #113  
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Originally Posted by pete mcrash
we get on well and i'll pop over for a brew at some point....cheers pete
Always a great brew here fella.
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