RiF Posted July 1, 2004 Share Posted July 1, 2004 Need to know how to calculate CV din and Kw for my Caterham as I am completing the import forms to import into France. Any ideas on the relationship to UK cc and bhp? Engine is: 1998cc, 226bhp and max torque 176ft/lb at flywheel or 185bhp and max torque 144ft/lb at wheels. Thanks Richard in France Flying fast in my very bright yellow 226bhp Duratec 7, with internal kevlar/carbon panels and pushrod suspension 😬 😬 😬.for pictures of 7 and carbon Link to comment Share on other sites More sharing options...
Sheds Moderator Posted July 1, 2004 Share Posted July 1, 2004 Hi Richard CV = cheval vapeur = 1.1HP 1HP = 746W Note that "puissance fiscal" is not the same as the power output in cheval vapeur, I'd hate to see your 7 go in at 200CV when the groups only go up to 20! Regards Battered Link to comment Share on other sites More sharing options...
conorkaby Posted July 1, 2004 Share Posted July 1, 2004 Battered/Richard Not too sure about those conversion figures.... www.onlineconversion.com shows 1cv = 0.986hp Link to comment Share on other sites More sharing options...
Sheds Moderator Posted July 1, 2004 Share Posted July 1, 2004 Sorry Richard/conork, absolutely right, I got the relation between Cv and HP the wrong way round and quoted the reciprocal. oops. 746W is definitive though. Link to comment Share on other sites More sharing options...
RiF Posted July 1, 2004 Author Share Posted July 1, 2004 Brilliant, thanks Steve and Conorkaby 😬Web page very useful. Next question?????? Is it based on flywheel or wheel hp? And Steve do you know how to calculate fiscal CV too (just out of interest) Richard in France Flying fast in my very bright yellow 226bhp Duratec 7, with internal kevlar/carbon panels and pushrod suspension 😬 😬 😬.for pictures of 7 and carbon Link to comment Share on other sites More sharing options...
Peter Carmichael Posted July 1, 2004 Share Posted July 1, 2004 144ft/lb at wheels I don't think so... Link to comment Share on other sites More sharing options...
Sheds Moderator Posted July 1, 2004 Share Posted July 1, 2004 Richard, I don't know how the puissance fiscal works but it's related to power, weight, engine type and efficiency. The 7 scores well for weight but badly for power/efficiency. Some of the modern low emissions HDi diesels have very low PF, how much of this is down to manufacturers doing the sums and fudging the figures a bit I don't know. Peter, is your remark related to the fact that the apparent torque at the wheels will vary according to the gear used? Link to comment Share on other sites More sharing options...
RiF Posted July 1, 2004 Author Share Posted July 1, 2004 Figures I have are 144ft/lb max at 6000rpm from Webber Alpha when they did the mapping of the ECU to work with the Duratec engine. Why not??? R500 is 122ft/lb at 7250rpm on Jason Krebbs car and we all know the Duratec has more torque???? Thanks Steve, we must get together soon. Richard in France Flying fast in my very bright yellow 226bhp Duratec 7, with internal kevlar/carbon panels and pushrod suspension 😬 😬 😬.for pictures of 7 and carbon Link to comment Share on other sites More sharing options...
Chris W Posted July 1, 2004 Share Posted July 1, 2004 Sorry to be a pedant but it's ft.lbs not ft/lbs Chris 2003 1.8K SV 140hp see it here Link to comment Share on other sites More sharing options...
thinfourth Posted July 1, 2004 Share Posted July 1, 2004 If this is related to tax how likely is it they are going to dyno your car? Sod the heater wheres my shades Link to comment Share on other sites More sharing options...
Bare Posted July 2, 2004 Share Posted July 2, 2004 Now if Memory serves.. DIN stands for Deutschland Invented Number?? Which is 15% less than SAE HP. As in 115DIN is actually 100Sae Hp.. while Japanese (JIS) hp is another 'not quite right" HP quotation :-0 All looks Good inna 'Brochure Babble' tho. Link to comment Share on other sites More sharing options...
Peter Carmichael Posted July 2, 2004 Share Posted July 2, 2004 Peter, is your remark related to the fact that the apparent torque at the wheels will vary according to the gear used? Yup. That'll be it. "144lbft at the wheels" actually means: "the torque we measured at the rollers multiplied by the roller speed and divided by the engine speed". The value that pops out of this fiddle is in the units of torque, but there is no such torque present anywhere in the drivetrain. It is a nonsense. Link to comment Share on other sites More sharing options...
RiF Posted July 2, 2004 Author Share Posted July 2, 2004 Peter - Why are these figures given. I have graphs for several se7en engines and this is always drawn on??? Richard in France Flying fast in my very bright yellow 226bhp Duratec 7, with internal kevlar/carbon panels and pushrod suspension 😬 😬 😬.for pictures of 7 and carbon Link to comment Share on other sites More sharing options...
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