Saltyhair81 Posted June 21, 2020 Share Posted June 21, 2020 Has anyone used a Dragy, and if so, would be interested to see what real life times people are getting with what set up.I purchased one a few weeks back and on a SV 150 Superlight with no doors and a decat, I'm struggling to break 5.5 seconds confirmed. I know I can improve once I sort my start and gear changes. I'm very mechanically sympathetic so I don't like doing too many runs! Interested to know if any others have had any experience on the matter? Link to comment Share on other sites More sharing options...
DJ. Posted June 21, 2020 Share Posted June 21, 2020 You really can't have any mechanical sympathy if you want the best 0-60 times. The testers do things like side stepping the clutch at 5000 rpm, not using the clutch and over revving the engine to avoid changing gear depending on what's required.I don't think you'll do much better than 5.5 seconds...................... in your own car anyway Link to comment Share on other sites More sharing options...
Tom_Arundel Posted June 21, 2020 Share Posted June 21, 2020 Take the screen off!! Did some times at Dunsfold years ago, tried using Ist and going to the limiter in 2nd 6.0sec. Then tried starting in 2nd and up to the limiter.....6.0...no difference! Took the screen off 5.4 sec! Tyre pressure makes a difference. Link to comment Share on other sites More sharing options...
Saltyhair81 Posted June 22, 2020 Author Share Posted June 22, 2020 Interesting comments. I was curious if it would be quicker with my doors back on? Taking the screen off I can understand as it's like hitting a block of wood. I want to keep it as realistic with everyday driving as possible though. Having the 6 speed means you really need to be in 3rd for 60 unless you want to hit the limiter which doesn't help things with the extra gear change.I am just interested to see where Caterham got their claimed time's and what factors they take into consideration. I've had this conversation before about MPG figures too. Link to comment Share on other sites More sharing options...
D Jones Posted June 22, 2020 Share Posted June 22, 2020 Forgive my ignorance, but what's a dragy?Is it an app or something that you tow? Link to comment Share on other sites More sharing options...
Saltyhair81 Posted June 22, 2020 Author Share Posted June 22, 2020 https://dragymotorsports.co.uk/It's a GPS box that registers your 0-60, 1/8th mile, 1/4 mile etc. The box sits in your car and the app registers times on your phone and is meant to be accurate within 1/100th of a second. It's interesting for feedback and you can take the box with you and use in any car you like. Most of the youtubers running car channels use them! Link to comment Share on other sites More sharing options...
JonT Posted June 22, 2020 Share Posted June 22, 2020 re #4, doors and screen - I found at Snetterton this week that running with a screen and no doors cost me 5-10mph on the back straight compared to screen with doors. But it was so warm, no doors ended up as the preferred option in the afternoon. However this is up around 100mph. I doubt the effect is so pronounced up to 60. Link to comment Share on other sites More sharing options...
Alastair B Posted June 22, 2020 Share Posted June 22, 2020 At the club's Donington 60th they had such a device.I have a 1.6k in an unusual set-up; 5 speed box, 3.62 diff and carrying a spare wheel....'touring' spec. you might call itThe car has a 4-2-1 powerspeed exhaust and DVA 13A kit (verniers, light porting, 633 grind cams...), standard ECU.The car was doing 5.5 / 5.4 seconds to 60mph typicallyClearly a 10% diff. ratio change to make it more 'sprinty' would help and ditching the rear wheel carrier.....maybe 5 seconds??Oh...I only weigh about 60Kg....too heavy for a jockey, but about the right height! Link to comment Share on other sites More sharing options...
Guy Lowe Posted February 14, 2022 Share Posted February 14, 2022 I'm a keen drag racing fan (USA not UK) and I see Clay Millican has fitted a Dragy Box to his top fueler. He is trying to top the Dragy leader board, Unfortunately the Dragy Box can't take the force of the burnout & needs to be reset Link to comment Share on other sites More sharing options...
Leadership Team Toughie Posted February 14, 2022 Leadership Team Share Posted February 14, 2022 If you have the windscreen on, I suspect that you'd get better times with a roof and doors on. A half hood, being slightly lower than the roof, might be even quicker, but I dunno if the low pressure zone behind the cockpit might negate that. Link to comment Share on other sites More sharing options...
Tom_Arundel Posted February 14, 2022 Share Posted February 14, 2022 I don`t know the workings of a Dragy but it includes an accelerometer. In my experience accelerometers are sensitive to orientation i.e. must be orientated exactly to the direction of acceleration......exactly horizontal and in line with the direction of travel. If it is tipped up or down by a small amount you will get errors in the readings. I doubt that GPS is `change of position` sensitive enough to calculate tenths of seconds. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 14, 2022 Member Share Posted February 14, 2022 An evaluation. I haven't gone through the metrology in detail...Jonathan Link to comment Share on other sites More sharing options...
Tom_Arundel Posted February 14, 2022 Share Posted February 14, 2022 Interesting.......precision or accuracy, that is the question Link to comment Share on other sites More sharing options...
Ivaan Posted February 14, 2022 Share Posted February 14, 2022 What you need is a sequential gearbox and a flat shifter. And 12,500 rpm will help. Link to comment Share on other sites More sharing options...
Tom_Arundel Posted February 15, 2022 Share Posted February 15, 2022 And a small person passenger for added traction..... and always best to do it on a down slope with a tail wind Link to comment Share on other sites More sharing options...
Guy Lowe Posted February 23, 2022 Share Posted February 23, 2022 Clay Millican has set a new DRAGY record standing start time and speed at Wild Horse Pass drag strip Arizona over an 1/8 mile of 289mph in 3.01 seconds. Link to comment Share on other sites More sharing options...
DougBaker Posted February 23, 2022 Share Posted February 23, 2022 My car was quickest when I let my wife drive, I am hoping it was because she is almost 30kg lighter than I am rather than being a reflection on driving talent Link to comment Share on other sites More sharing options...
Leadership Team Toughie Posted February 28, 2022 Leadership Team Share Posted February 28, 2022 I know of at least two other members who have told me that their wives turn in quicker lap times than they do.They keep telling us they want equality, why don't they stick to it? Link to comment Share on other sites More sharing options...
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