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#89611 - 1st Feb 2006 12:09am BHP per tonne??
scoop Offline
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Registered: 18th Nov 2004
Posts: 7238
Loc: Leuchars
The new homepage had me checking out my power-weight ratio and my desired ratio,as it works in lbs tho and not KGs its a bit wierd, first i had to enter my power,easy,then comes the hard part,what does an escort weigh in lbs,converted it using my phone,1365KG (escort book kerbweight inc fuel and driver) is 3009lbs,thats 3 tonnes.that means my car has less than 30BHP per tonne,this is correct,but actual BHP per ton,is done in metric tons. Think the power to weight convertor needs changing,ATM its a bit useless TBH.My car actually has 65.93 BHP per ton.Wonder how much i can raise that just by stripping it to death (which i may do in the summer)

Whats your power to weight ratio.Your kerbweight can be found out using this site. And to convert it use your calculator and type in (power)/Weight in tons. IE 90(BHP)divided by 1.365 ton(1365 KGs)
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#89612 - 1st Feb 2006 1:16am Re: BHP per tonne??
Dazza Offline
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Registered: 10th Nov 2003
Posts: 2899
Loc: Birkenhead
Or spend 3 down wallasey dock road and get your car weight'd

Curb weight is NEVER right, think off the shit such as mud etc stuck to the car and drivers weights vary alot
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#89613 - 1st Feb 2006 1:54am Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
Scoop look at the top right?

On the home page under the MMC Snap Shot
there is a converter?

Kg to lb

Work that out and you can use the power to weight.
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#89614 - 1st Feb 2006 11:50am Re: BHP per tonne??
scoop Offline
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Registered: 18th Nov 2004
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thats what i did mark but it gives u ur BHP per imperial tonne.Which is not the correct way,i can work it out myself but im just saying the convertor would be handy for those who dont know the calculation,

didnt know it only cost 3 quid to weight your car,think ill do this on saturday,find out what my car weighs with just me and the fuel in,and the spare
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#89615 - 1st Feb 2006 12:42pm Re: BHP per tonne??
AX_125 Offline

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Registered: 10th Nov 2003
Posts: 3793
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why don't you have a go at writing a correct online calculator for use on the CW website?

Shouldn't be to hard if you know the actual calculation, seems fairly simple coding techniques.
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#89616 - 1st Feb 2006 4:06pm Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
I will look into it as soon as i can,
and hopefully get it sorted.

If you can explain the correct conversions then i can adjust them..

and we can get it sorted.

Weight to ratio =

Weight / BHP * 1000 = BHP Per Tonne

As there are 1000 lb's in a Tonne.

Scoop are you sure that your car weight is 3 tonne?
As scooby's subaru was just under 2 tonne?

------------------------------

The more i read it the more confused you have got me? doh

Any help anyone, as it would be good to get it right. learn
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#89617 - 1st Feb 2006 4:12pm Re: BHP per tonne??
AX_125 Offline

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Registered: 10th Nov 2003
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the version on the cw page seemed pretty correct when i tried it.

Instead of being BHP @ the wheels, it should say, BHP @the Fly wheel i think, but the calculation seems to be correct.

My weight is 1200 and my BHP is 130 which is about 109BHP/Tonne
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#89618 - 1st Feb 2006 4:25pm Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
Quite possibley,
but the normal conversion is at the wheel
on simular conversion sites.

Your weight and scoops weight have to be simular,
just off body size (cars peeps cars).

Try the same but at the wheels for me AX
not at the fly and see if its a million miles out?

Back later - going out.
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#89619 - 1st Feb 2006 4:31pm Re: BHP per tonne??
AX_125 Offline

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Registered: 10th Nov 2003
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my BHP at the wheel is 108, my weight is 1200 my BHP/Tonne is 90. which is BHP/Weight * 1000kg

The calculation is correct, but is the calculation of BHP measured from the wheel or the fly wheel?


the weight of the escort seems to hover around the 1100kg mark.
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#89620 - 1st Feb 2006 4:36pm Re: BHP per tonne??
AX_125 Offline

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Registered: 10th Nov 2003
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actually i see where scoop is coming from now.

My car weighs 1200kg

I put 1200kg in to the kg to lbs converter and it gives a result of 2645.5471464lb (which is correct)

I put the lb value in to the BHP/Tonne converter and it gives the following result:

Your Power:Weight Ratio is 1 : 24.5 Or 41 BHP per ton

The BHP/Tonne converter has been setup to measure in KG rather than lbs.

If i put 1200 in to the converter, which is my weight in KG rather than lbs is gives a result of 90 BHP/Tonne @ the wheel (which is correct)
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#89621 - 1st Feb 2006 11:31pm Re: BHP per tonne??
scoop Offline
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Registered: 18th Nov 2004
Posts: 7238
Loc: Leuchars
thats the badger. My car weighs 1365 kilos max(apparently) and thats over 3 imperial tonnes. For weighing cars u have to use KGs not lbs..Ill find out what my car weighs this saturday,if anyone knows the exact location of this place dazza suggested
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#89622 - 2nd Feb 2006 12:08am Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
Okay i'm looking at this now,
hopefully we should get it sorted lol...
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#89623 - 2nd Feb 2006 12:41am Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
I think its looking allright now?

Can you check boys smile

------ Horsepower Converter ---------

Does this mean that the lbs
is also wrong does that need up dating to kg also.

There only guestimates at best but good fun.

Can anyone check please, no guessing please.
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#89624 - 2nd Feb 2006 11:26am Re: BHP per tonne??
AX_125 Offline

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Registered: 10th Nov 2003
Posts: 3793
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The correct forumla for finging our BHP/Tonne using lbs is

BHP/weight in lbs * 2204.622622

At the moment you are using the formula to work our the BHP/Tonne using KGs
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#89625 - 2nd Feb 2006 12:02pm Re: BHP per tonne??
Mark Online   Reading


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Registered: 9th Nov 2003
Posts: 21062
Loc: Wirral
I done a google search on Power to weight Ratio,
and the formular seems to be BHP/Weight * 1000

When i looked up ton - tonne and the rest.

1000kg = 1 tonne

or

1000lbs = 1 tonne

-------------
I confused even more now.

Can anyone shed any light...

------------
Ax you reckon that if i * by 2204.622622 should work?

doh doh doh help
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