NW76 499 Posted January 17, 2017 Report Share Posted January 17, 2017 No clue ... looked pretty fast though ... Quote Link to post Share on other sites
Bibs 11,165 Posted January 17, 2017 Report Share Posted January 17, 2017 Same speed as the rears (or within a small tolerance, I'd guess 10% or similar). 4 wheel RR's do this. Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
French Frie 401 Posted January 17, 2017 Author Report Share Posted January 17, 2017 it looks like I'll visit once again the dyno on saturday ... 1 Quote Link to post Share on other sites
Bibs 11,165 Posted January 17, 2017 Report Share Posted January 17, 2017 I know a calibration engineer at the factory, let me give him a quick call... 1 Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
French Frie 401 Posted January 17, 2017 Author Report Share Posted January 17, 2017 it would be great Bibs ! please also ask him what is the best DPM mode for the dyno run (Sport / Race (if fitted) /OFF) ... My guess is OFF, but with electronic, who knows ? Quote Link to post Share on other sites
NW76 499 Posted January 17, 2017 Report Share Posted January 17, 2017 10 minutes ago, French Frie said: it looks like I'll visit once again the dyno on saturday ... Keep us posted ... will be interesting to see the difference ... Quote Link to post Share on other sites
Bravo73 1,297 Posted January 17, 2017 Report Share Posted January 17, 2017 5 hours ago, NW76 said: Give KT a call ... if the front wheels dont turn you get the wrong results imho ... 20-30 Hps less ? ... seriously, I talked about it with Daniel when my car was on the Dyno and he even knew the figure of what it will have as a negative influence on measurement ... dont know anymore ... if it was 30 Hps though There is a good explanation for it ... I just dont remember exactly what it was ... talked about it with Daniel from KT ... as he brought it up as one of the main reasons for wrong measurements with Lotus ... think it was electronics interfering even when all is off ... I wonder if @Hangar 111 could share his thoughts about this? Does your dyno spin the front wheels, Dave? Quote Link to post Share on other sites
Hangar 111 302 Posted January 17, 2017 Report Share Posted January 17, 2017 6 hours ago, Bravo73 said: I wonder if @Hangar 111 could share his thoughts about this? Does your dyno spin the front wheels, Dave? If the front wheels are not spinning at same +/- a bit speed, then the ECU has a bit of a panic as it thinks the car is doing something weird, like a massive wheelie It goes into protection mode and will add fuel to look after itself, so you will find it goes quite rich at this point, which will affect the power. This occurs even with DPM set as off as it can be, because as far as the ECU is concerned, there is a speed sensor issue. Unfortunately, we can't run to the six-figure sum required for a 4-wheel dyno just yet, so our dyno does not spin the front wheels. We are working on an electronic solution though - it doesn't take a huge leap of imagination as to how we are going to do this. This issue also affects the other models that have TC/DPM/whatever-it-is-called-this-week. Dave Quote Link to post Share on other sites
French Frie 401 Posted January 17, 2017 Author Report Share Posted January 17, 2017 I assume it takes the info from the ABS sensors... I know that on some sportscars, it is well known to take out a fuse to suppress the ABS function, without disturbing the rest of electronics. Can't it be a (poor man) solution ? Quote Link to post Share on other sites
Hangar 111 302 Posted January 17, 2017 Report Share Posted January 17, 2017 Yes it does use the wheel speed sensors in the hubs (or pointing at the hub on the rear of the Exige). You can't just disconnect them, you get the same result, if the ECU can't see them spinning, it assumes something is wrong. Maybe if Lotus had included a VW-style test mode! Dave 1 Quote Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 On 17/01/2017 at 09:34, Bibs said: I know a calibration engineer at the factory, let me give him a quick call... Bibs - did you manage to get any info from Lotus themselves? Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
Bibs 11,165 Posted January 18, 2017 Report Share Posted January 18, 2017 I'm awaiting my voicemail being returned Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 Thanks. Anyone know of a rolling road in the south east that will spin the front wheels? 1 Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
Bibs 11,165 Posted January 18, 2017 Report Share Posted January 18, 2017 http://www.rollingroadregister.com/dynos/4wd-rolling-road Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
NW76 499 Posted January 18, 2017 Report Share Posted January 18, 2017 Hey hey ... @550superfast are you curious? Yours is so fast (or is it the driver???) that I would be very surprised if its delivering less than the claimed 350... Quote Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 I have seen that register and wasn't sure how up to date it was, I also have a local 4WD road, but it won't spin the front wheels. A recommendation would be most desirable. Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
Bibs 11,165 Posted January 18, 2017 Report Share Posted January 18, 2017 I did spot Austec on there and that's the place that couldn't do the Evora in truth. It's the only RR I've been to I'm afraid. Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 7 minutes ago, Bibs said: I did spot Austec on there and that's the place that couldn't do the Evora in truth. It's the only RR I've been to I'm afraid. They went a few years ago - no longer in business as far as I am aware. Had my old sprint there. 1 minute ago, NW76 said: Hey hey ... @550superfast are you curious? Yours is so fast (or is it the driver???) that I would be very surprised if its delivering less than the claimed 350... I was on two rolling roads last week, with very odd results. So I was very pleased to see this thread started. Will post up results when I have a full picture. Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
Rancid 104 Posted January 18, 2017 Report Share Posted January 18, 2017 Do, or can hub dynos spin the front wheels? Quote '....it makes every other roadster look just a little bit cissy...' Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 No they don't. I am told the make to use is a Mustang as that can link the rollers. Found one in Maidstone Kent http://www.jfautomotive.co.uk/ Looks like Komo-tec have one - see the front wheels Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
NW76 499 Posted January 18, 2017 Report Share Posted January 18, 2017 Superfliow SF880 is one that works ... Quote Link to post Share on other sites
550superfast 446 Posted January 18, 2017 Report Share Posted January 18, 2017 Do you know what percentage they add to calculate the flywheel power from the wheel power? Quote https://www.youtube.com/user/400superamerica Link to post Share on other sites
NW76 499 Posted January 18, 2017 Report Share Posted January 18, 2017 No clue - but you can use my graph above to come up with a function that should be close. Quote Link to post Share on other sites
TBD 781 Posted January 19, 2017 Report Share Posted January 19, 2017 It is the line labeled "EsLSHP" in the graph, approx.11% loss. Quote If you have the choice between a Stairway to Heaven and a Highway to Hell don't forget the Nomex®! Captain, Lotus Airways. We fly lower! Link to post Share on other sites
Jack 546 Posted January 19, 2017 Report Share Posted January 19, 2017 Is it just me or does 11% drivetrain loss seem low? Quote Jack2008 2-Eleven2015 Exige V6 CupR Track videos ... http://www.youtube.com/jackcup2010 Lotus Challenge Series ULTRA Class champion2012 Lotus CUP USA OPEN Class champion Link to post Share on other sites
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