vid of my 2.0 corsa - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Dave A

USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline

18th Dec 06 at 19:58

steve, you should know that NO rollers are 100% accurate.

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

18th Dec 06 at 19:58

It may well be 180bhp or thereabouts, but IMO, it doesn't seem to be going like a 180bhp corsa should, mine was quicker to 60 than that.

Steve

Premium Member

Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline

18th Dec 06 at 19:59

quote:
Originally posted by Dave A
steve, you should know that NO rollers are 100% accurate.

yes these were probabl 60% accurate

Steve

Premium Member

Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline

18th Dec 06 at 19:59

quote:
Originally posted by Robin
It may well be 180bhp or thereabouts, but IMO, it doesn't seem to be going like a 180bhp corsa should, mine was quicker to 60 than that.

its no quicker than my 106, in fact it looks slower

SportBoy

Member

Registered: 5th Oct 01
Location: Retford, Nottinghamshire
User status: Offline

18th Dec 06 at 20:00

maybe they were only 99.99 accurate! !

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

18th Dec 06 at 20:00

ok, lets say it IS right, it doesn't look it, does it Dave?

phillygsi16v

Member

Registered: 4th Jan 06
Location: wirral
User status: Offline

18th Dec 06 at 20:00

know 1 is saying they are 100% he just simply said thats what the read out was.

csweatherston

Member

Registered: 16th Jan 06
Location: Devon
User status: Offline

18th Dec 06 at 20:00

hmmm....maybe it has 22" rims......that seems abit slow, even if every gearchange is hitting the limiter....

Steve

Premium Member

Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline

18th Dec 06 at 20:00

yes i dont doubt thats what the readout was

Dave A

USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline

18th Dec 06 at 20:01

quote:
Originally posted by Robin
ok, lets say it IS right, it doesn't look it, does it Dave?

well ive been in a few corsas with that sort of power, they get to 60mph a LOT faster than that. look at the vids tomSBD posted a while back....

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

18th Dec 06 at 20:02

130bhp would see 60 quicker, and it doesnt sound like it's wheelspinning in 1st.

phillygsi16v

Member

Registered: 4th Jan 06
Location: wirral
User status: Offline

18th Dec 06 at 20:04

he didnt post up it was quick he simply said what he got on the rollers did he not

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

18th Dec 06 at 20:06

no, he posted a vid, would have thought that meant he wanted comments about the vid?

phillygsi16v

Member

Registered: 4th Jan 06
Location: wirral
User status: Offline

18th Dec 06 at 20:12

yer but peoples comments are 1 thing and takeing the piss and making people out to be dick heads are different. if you think its slow then keep it to your self its the same as if you dont like sumthing you dont post up saying its shite do you.
people spend there money on different things and have differnt tastes thats why its call modifying every 1 would have the same and that would get boring

tooolbox timmy

Member

Registered: 6th Dec 05
Location: lancashire
User status: Offline

18th Dec 06 at 20:24

quote:
Originally posted by Dave A
steve, you should know that NO rollers are 100% accurate.

how about your rollers,how will we know that yours are accurate?

Ian W

Member

Registered: 8th Nov 03
Location: Wirral, Merseyside
User status: Offline

18th Dec 06 at 20:29

quote:
Originally posted by justrials2
the car was 178.5 bhp
it had a remaped ecu/ high lift cams/ported an polished head/ uprated valves/double valve srprings/venier pullys/ uprated fuel pump/ decat /full power flow exhust system /4brach manifold/ectec pipe/uprated ruel regulator

[Edited on 18-12-2006 by justrials2]

Really Sean, did you actually expect anything over 160bhp, You should know Corsasport law doesnt permit that

Robin

Premium Member

Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline

18th Dec 06 at 20:29

quote:
Originally posted by phillygsi16v
yer but peoples comments are 1 thing and takeing the piss and making people out to be dick heads are different. if you think its slow then keep it to your self its the same as if you dont like sumthing you dont post up saying its shite do you.
people spend there money on different things and have differnt tastes thats why its call modifying every 1 would have the same and that would get boring

WTF?

My comment about it not seeming quick was a bit of constructive criticism, and to see if he thought the same.

I know people spend money on different things, I never debated that, all I am saying, is it seems slow for a 2 litre, let alone a modified 2 litre.

180bhp Corsas are considerably faster than that IMO, making me think there is something wrong with it.

If no-one says anything, it just turns into a compete farce, where everyone thinks their car is the best/fastest car ever, like other forums, where whatever you say which isn't 'looks great' gets deleted.

If he didn't want replies, he shouldn't have posted the video...

marklawton

Member

Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
User status: Offline

18th Dec 06 at 20:29

quote:
Originally posted by Ian_Gsi16v

quote:
Originally posted by justrials2
the car was 178.5 bhp
it had a remaped ecu/ high lift cams/ported an polished head/ uprated valves/double valve srprings/venier pullys/ uprated fuel pump/ decat /full power flow exhust system /4brach manifold/ectec pipe/uprated ruel regulator

[Edited on 18-12-2006 by justrials2]

Really Sean, did you actually expect anything over 160bhp, You should know Corsasport law doesnt permit that

lol

Dave A

USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline

18th Dec 06 at 20:36

as I said, no rollers are accurate.

new generation rolling roads (now known as chassis dynamometers) are far better as they take a lot more into considertion. old type rollers (usually heavy roller type) dont calculate things such as strapdown pressure, barometric pressure, vehicle weight....they then use coastdown as a transmission loss figure which is so unaccurate as they use it as a percentage figure.

new generation rollers are very light, can even run a 0.5hp engine on them. they take things like vehicle weight, strapdown pressure, barometric pressure into consideration and instead of using a calculation every 250 or 500 rpm and smooth the graph out manually they take a signal every 25 rpm and most importantly will give a wheel bhp figure rather than use an estimated calculation for the transmission loses.

tooolbox timmy

Member

Registered: 6th Dec 05
Location: lancashire
User status: Offline

18th Dec 06 at 20:47

fair comment

Dave A

USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline

18th Dec 06 at 20:50

just a quick expalnation of how some coastdown rollers are innacurate:

they take a bhp figure at the wheels (lets say 100bhp) this is often an accurate figure.

to measure the loss of things like transmission and tyres etc... they then take the car up to peak power, put it in neutral and let the engine 'coast down' to idle. the RR takes the figure that the engine gives in resistance during the coastdown and calculates this into a percentage of the wheel figure and adds this percentage to the wheel figure to give the flywheel figure. for example:

wheel bhp: 100
coastdown losses: 15%
estimated flywheel figure: 115

now lets say the tyres were 5 psi down on pressure. this will not affect the wheel figure greatly, maybe by 1% if anything. but during coastdown it can show as a 5-10% extra transmission loss (lets say 7%)

wheel bhp: 100
coastdown losses:22%
estimated wheel figure: 122

so with low tyre pressure it has gained 7bhp.

the same principle is used if the car is strapped down too hard, more pressure onto the rollers, no change to the wheel bhp, big difference to the coastdown figure as the it now has more resistance to the rollers slowing down. (same for vehicle weight etc....)

Twiggy

Member

Registered: 15th Oct 04
User status: Offline

18th Dec 06 at 20:59

when i had it its was running 169bhp with full powerflow ectoec pipe and a bmc induction....

it was on the rollers where adam b got 155bhp and then recently got 156bhp (ish(ish) so i recon 167bhp was a fair reading when i had it and sean fitted lots of other bits...

it was quick when i had it

god i miss that car!!! hehehe!

[Edited on 18-12-2006 by Twiggy]

Twiggy

Member

Registered: 15th Oct 04
User status: Offline

18th Dec 06 at 21:02

Said car!