Slipper man Posted May 22, 2016 Share Posted May 22, 2016 Does anyone know any corner weight scales near Caterham that I can use? I don't really need to pay someone to set it up, but it would be good to get the corner weights set up, and the geometry set up correctly. Link to comment Share on other sites More sharing options...
Area Representative Shep7 Posted May 22, 2016 Area Representative Share Posted May 22, 2016 Have a look at PGM 's website,Andy will do this for you,at a price of course .C7 EVN ,Les S. Link to comment Share on other sites More sharing options...
Slipper man Posted May 22, 2016 Author Share Posted May 22, 2016 Who is PGM? Is that Andy Belcher? Link to comment Share on other sites More sharing options...
7 wonders of the world Posted May 22, 2016 Share Posted May 22, 2016 Get down vto B&Q and get 8 bathroom scales, 2 per wheel with a piece of ply bridging them,Find a level place in the garage, correct with shims if necessary,Ballast the car as requiredKnock up a spreadsheet in excel and away you go.Simply, cheap and repeatable Link to comment Share on other sites More sharing options...
Area Representative Shep7 Posted May 23, 2016 Area Representative Share Posted May 23, 2016 PGM has an advert top right at the top of this page and in Low flying. Link to comment Share on other sites More sharing options...
Mark Durrant Posted May 23, 2016 Share Posted May 23, 2016 I can highly recommend Andy Jupp at Partridge Green Motorsport, Nr Horsham, West Sussex. He has set up my Busa Superlight including corner weighting, laser alignment, shimming the De Dion ears etc and the car handles perfectly Link to comment Share on other sites More sharing options...
Simon.Rogers Posted May 23, 2016 Share Posted May 23, 2016 No more excuses then By the way agreed just take it to Andy. You know it will be right! Link to comment Share on other sites More sharing options...
Mark Durrant Posted May 23, 2016 Share Posted May 23, 2016 SimonGiven the result at Curbs are you visiting Andy on route to Gurston Link to comment Share on other sites More sharing options...
raydoc Posted June 15, 2016 Share Posted June 15, 2016 For the last 10 years, I have used 4 off 180kg bathroom scales to set up my hillclimb Supersprint - 250 bhp Vx .I created a flat floor by creating 4 epoxy cement square wheel pads c. 300 mm square and 4 more chassis height measuring pads c.150 mm square on my concrete garage floor. I used a long spirit level to get all 8 pads level to +/- 1mm. Suitable Salter scales can be sourced for c. £20 each which are ideal - thick glass top with digital readout. I also load the driver's side with a stack of plastic storage boxes filled with water and totaling 94 kg (my weight in racing kit + my foam seat). I use a hydraulic jack on each corner in turn, letting the jack down slowly so the damper does not temporarily support any of the car weight.I use this set-up to measure corner weights and ride heights. Perfect corner weighting is impossible with driver only in the car. I find it best to go for the ride heights and a rake of 15 mm / m as Caterham recommend. I find both fronts and rear left corner weights come out around 140 kg and rear right about 170 kg. Currently, with lots of light-weighting, my car weighs 492 kg (ex driver and fuel) and around 590 kg on the start line.If any of your corner weights exceed 180 kg, I believe that 250 kg digital bathroom scales are coming available! Link to comment Share on other sites More sharing options...
Ed White Posted June 16, 2016 Share Posted June 16, 2016 I used to use the bathroom scale route years ago. If you struggle getting ones with a high enough rating, try ebay for the USA :) Link to comment Share on other sites More sharing options...
Roger Ford Posted June 16, 2016 Share Posted June 16, 2016 Amazon have loads of electronic scales which will go up to 180kg, but as I recall the problem with using electronic scales is that most automatically switch off after a short period. Does anyone have a recommendation for scales which don't do that, or a workaround for it? Switching them back on would be OK, so long as they don't automatically zero themselves when switched on. Link to comment Share on other sites More sharing options...
Mankee Posted June 16, 2016 Share Posted June 16, 2016 These apparently have programmable auto-off features: http://www.ebay.co.uk/itm/251855329150http://www.ebay.co.uk/itm/141817300935 Link to comment Share on other sites More sharing options...
ECR Posted June 16, 2016 Share Posted June 16, 2016 180kg would be uncomfortably close to max for my boat anchor .... Link to comment Share on other sites More sharing options...
Slipper man Posted June 16, 2016 Author Share Posted June 16, 2016 ... but not for mine, unless I have been spending too much time eating Barbara's excellent food!Still, booked in next week with Andy at PGM, so we will see how it feels after that. Oh yes, and a set of Meteor Moteorsports Nitrons... Link to comment Share on other sites More sharing options...
ECR Posted June 17, 2016 Share Posted June 17, 2016 Well I've got a new battery so there ! Link to comment Share on other sites More sharing options...
Slipper man Posted June 17, 2016 Author Share Posted June 17, 2016 Does that offset the effect of the over indulgence in Barb's cooking then? Link to comment Share on other sites More sharing options...
ECR Posted June 17, 2016 Share Posted June 17, 2016 On a more serious note, I made a set of these to work with very cheap mechanical scales. They reduce the scale reading by 50% and remove any possibility of the scale mechanism jamming due to sideways thrust. The plate on which the tyre rests is mounted on a bar which is free to self align and the bar is exactly halfway between the scale contact point and the floor contact point .A gentleman by the name of Ruggles apparently concieved the idea ....The scales don't need to be particularly accurate, as long as they are all equally inacurate (IYSWIM). That can be checked by placing the same weight on all 4 corners and adjusting ... Link to comment Share on other sites More sharing options...
Roger Ford Posted June 17, 2016 Share Posted June 17, 2016 Sounds interesting, but can't see a thing in that photo. Have you got a larger version? Link to comment Share on other sites More sharing options...
ECR Posted June 17, 2016 Share Posted June 17, 2016 Try that. I have some drawings I can forward if this is not clear Link to comment Share on other sites More sharing options...
Roger Ford Posted June 17, 2016 Share Posted June 17, 2016 Got it. That's pretty neat but beyond my welding skills - and no doubt having a set made up wouldn't be much cheaper than getting a full set of proper race scales. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted June 17, 2016 Share Posted June 17, 2016 Making the scales less accurate kind of defeats the object of the excerise.......I did mention previously I use simple salter analog scales two per wheel with a bridge, so they are working in the middle of their range.As for slip plates simply slice a tesco plastic bag down the sides fold in half and ly on the bridge under the wheel and you have a very effective slip plate for a mere 5p.Consistently repeatable readings can be obtained this way - and repeatability is the key to any set up kit. Link to comment Share on other sites More sharing options...
ECR Posted June 17, 2016 Share Posted June 17, 2016 Well, not really, The object of the excersise is a comparison between left weights and right . the absolute weights are not that important as long as the the percentages left to right/front to rear are very close. The readings on the scales are interesting but not critical its the comparison left/right that's critical Link to comment Share on other sites More sharing options...
Simon.Rogers Posted June 17, 2016 Share Posted June 17, 2016 Just use a tape measure and set the ride heights equal.I have proper scales and always start off with a tape. Very rarely need to adjust much after that. Link to comment Share on other sites More sharing options...
Dave J Posted June 17, 2016 Share Posted June 17, 2016 here's my method from way back in 2008 !!http://www.lotus7.club/forum/techtalk/settin-adjustable-platforms-without-scales Link to comment Share on other sites More sharing options...
Mankee Posted June 18, 2016 Share Posted June 18, 2016 I used Simon's and Dave's tape measure methods (cheers lads) when I fitted the Nitrons a few weeks ago. And when I borrowed some scales to check it, it was 49.96%/50.04% across the diagonals. I'm no driving legend so I would never have noticed that 0.04% deviation. And it all gets knocked around when you start carrying passengers and have different fuel loads anyway. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now