Peter R Shaw Posted March 8, 2004 Share Posted March 8, 2004 Does anyone have any experience of fitting one of these to a caterham ? ant tips or disasters to avoid? Road7runner S7S.1.7 X flo here Link to comment Share on other sites More sharing options...
Myles Posted March 8, 2004 Share Posted March 8, 2004 Loadsa people have. Here is my page here I must update that a bit sometime, but essentially it's all there (or thereabouts). My tips include mounting it above the scuttle - attached to the screen/aeroscreen using a B&Q corner block (used to build flatpack furniture) - you really need the computer in near-line-of-sight... Mounting the sensor is easy enough if you have cycle wings (it attaches to one of the stays. You'll need to extend the wire - easy enough if you have access to a soldering iron - or phone a friend... Only problem is lighting... due to the line-of-sight issue (I stopped using the main speedo as I had to look away from the road), I got completely taken surprise the first time I drove at night - I now use a small LED torch which is attached to my Road Angel - but I guess for many people, it is easier to fit a small LED wired into the car. Oh, calibration is best done using the chalk, tyre valve and tape measure method - push the car forward one wheel revolution and measure the distance. Regds, Myles Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 8, 2004 Share Posted March 8, 2004 I've just fitted one as well - see below.... Charles --- My Caterham Academy 2004 Diary Link to comment Share on other sites More sharing options...
Myles Posted March 8, 2004 Share Posted March 8, 2004 Erm, Charles old chap... What (if you don't mind me asking) is the point of putting it down there other than to record your max speed and other semi-static data? It's way outside line-of-sight for situations when you actually *need* an accurate speed (e.g. in town, near speed cams etc...) Or is it just to scare the ballast? Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
Myles Posted March 8, 2004 Share Posted March 8, 2004 Ah!, OK, just read the words 😳 What's wrong, in that case, with the blank area just below the scuttle above, and to the right of the wiper switch... You can feed the wire through one of the existing switch holes - just being careful not to nip it against the sharpish ali cutout... Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 8, 2004 Share Posted March 8, 2004 Myles, Will have a look there - I'm sure I tried it but it's worth a check. Lucky I left a foot or so of spare wire coiled up.... Charles --- My Caterham Academy 2004 Diary Link to comment Share on other sites More sharing options...
Myles Posted March 8, 2004 Share Posted March 8, 2004 I think I actually ran with it in that position briefly, but found that it was quite hard to access the buttons (especially any on the bottom of the unit)... What is your issue with having the thing above the scuttle? I admit the wire is a little unsightly - but I've not had any issue with snagging it, for instance... The B&Q placcy triangles cost about £1.50 for 24 or so (IIRC), and can be painted... I did have to make a minor adaption to the mount so that it would sit happily on a flat surface rather than the curve of handlebars - but you'd need to do that for a dash mount anyway. Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
Strangely Posted March 8, 2004 Share Posted March 8, 2004 And a plug for my, now hopelessly out of date, site: http://www.strangely.org/owned/bikecomp/index.html I've now got the speedo mounted on the dash, in front of the standard one, with a little bracket holding a bulb over the bike computer. All custom bracketry was courtesy of SpeedySteve. The speedo has now done about 46,000 miles without fault, and is easily reconfigured for different wheel / tyre sizes. Definitely recommended. Link to comment Share on other sites More sharing options...
Steve-B Posted March 8, 2004 Share Posted March 8, 2004 what Myles has done is very Top Drawer....especialy the "night light' Steve B Big Black Beast^3 SV VHPD USA 2005: How the West Was Driven Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 8, 2004 Share Posted March 8, 2004 No particular issue with having it above the scuttle - except whether the mounting brings any issues for scrutineering (I'll have to remove the speedo for racing) Charles --- My Caterham Academy 2004 Diary Link to comment Share on other sites More sharing options...
Myles Posted March 8, 2004 Share Posted March 8, 2004 OIC... Not entirely necessary for racing anyway... (although VMax is always interesting to know ) Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted March 8, 2004 Share Posted March 8, 2004 I thought after changing the wheel size (15" to 13"), tyre profiles, gearbox (5sp to 6sp), diff ratio (3.92 to a 3.62), that the existing speedo would be miles adrift. Checked it with gps and it now is now very accurate. Worst case was at sevety five miles an hour indicated when the car was actually doing 73.8 mph!!! Figured I might as well stick with the tried and tested! Makes you wonder how 'out' it was before eh? Link to comment Share on other sites More sharing options...
CharlesElliott Posted March 8, 2004 Share Posted March 8, 2004 Have to remove it for racing because of the regs, not through choice 😬 Charles --- My Caterham Academy 2004 Diary Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted March 8, 2004 Area Representative Share Posted March 8, 2004 Peter My tip would be to mount the magnet on the hub/disc (rather than wheel) - just below where the pads sweep the disc. You can then mount pick up on stub axle using cable tie. No problems then if you swap wheels around!! Paul Richards Joint AO - L.A.D.S. (Lancashire and District Sevens) Growing old is compulsory - Growing up is optional Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted March 8, 2004 Leadership Team Share Posted March 8, 2004 The Sigma range is good to 183mph The BC800 is pretty straightforward, and the BC1200 will allow the presetting of 2 different wheel sizes. Each will give clock, max speed, avg speed, time elapsed, distance covered. The BC1200 will give distance covered for each wheel size setting. It records cadence also but not much use in the Se7en Stu. Link to comment Share on other sites More sharing options...
stevefoster Posted March 8, 2004 Share Posted March 8, 2004 Here's a couple of pics of Jason's inc light bracket. here Hants (North) and Berkshire Area club site here My racing info site here Edited by - stevefoster on 8 Mar 2004 22:50:11 Link to comment Share on other sites More sharing options...
Peter R Shaw Posted March 9, 2004 Author Share Posted March 9, 2004 thanks for all the help guys ..... good idea Paul ..... I have clams so I was thinking that would be the best place with no close brackets as with the cycle wings ...i bought a TOPEAK PANORAM..... a little larger than the sigma but I think it should do the job .... says it works to 120 MPH .... do people just solder the wires in to extend the sensor? is speaker wire ok ? or better to get wire from Maplins to suit? Road7runner S7S.1.7 X flo here Link to comment Share on other sites More sharing options...
stevefoster Posted March 9, 2004 Share Posted March 9, 2004 Just solder an extension in. I had a Raleigh Pro20 bike computer before the Sigma and that had horrible core and screen wires that were coated instead of plastic insulated. Real pain to solder. The Sigma ones were much easier. I seem to remember Phil W having no trouble with Topeak ones. I made a short blade bracket that bolted on to the front most hub bolt. The bike computer was attached to that at rim distance. Worked fine on my 2nd Clamshell 7. I have a pic somewhere if you need it for ref. Hants (North) and Berkshire Area club site here My racing info site here Link to comment Share on other sites More sharing options...
Peter R Shaw Posted March 9, 2004 Author Share Posted March 9, 2004 Yes please .... pictures are very good for clarifying things ..... Road7runner S7S.1.7 X flo here Link to comment Share on other sites More sharing options...
Myles Posted March 9, 2004 Share Posted March 9, 2004 I just soldered and then connected via nasty terminal block stuff -but that was the very first 'job' I did on the 7 and have since gone back with a gas powered soldering iron and heatshrink tubing... Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
Dave McCulloch Posted March 9, 2004 Share Posted March 9, 2004 Does the wheel with the magnet attached need rebalancing - how much does the magnet weigh? Dave Link to comment Share on other sites More sharing options...
Jason Plato Posted March 9, 2004 Share Posted March 9, 2004 The magnets can be had from B&Q magnetic door latches . The magnets are 10mmx10mmx4 mm , they can be stck onto the rim . They have little or no effect on ballanceing Link to comment Share on other sites More sharing options...
Myles Posted March 9, 2004 Share Posted March 9, 2004 Second that - I've not noticed any balance problems. I've tended to use the magnets that come with the comp. With Sigmas you get two - one hefty steel clad jobby designed to screw-clamp to the spoke (unsuitable) and a smaller, lighter one in an easily opened plastic jacket that is more appropriate. I've also used the magnetic bases of redundant travel-chess pieces (!) They all seem to work OK. Keep BC free and open for ALL. Membership No. 43xx Alcester Racing 7's Equipe - 🙆🏻™ Link to comment Share on other sites More sharing options...
anon7 Posted March 12, 2004 Share Posted March 12, 2004 Myles (or anyone else having fitted this) My father has one of these invalid type scooters as he suffers from Emphysema, and has talked about fitting one of these to that so that he can keep track of how many miles he`s done etc. Can these be calibrated for any size wheels? I seem to think that the wheels on his scooter maybe about 12-15" in diameter or thereabouts Thanks for the advice if you can help Shaggers Summers coming, but not quick enough............. Peter , sorry for hijacking your thread It`s not yours............it`s R7 NOW Edited by - shagbat on 12 Mar 2004 08:35:49 Link to comment Share on other sites More sharing options...
Jason Plato Posted March 12, 2004 Share Posted March 12, 2004 Yeah - these will fit anything , so long as you canm find a mounting point close to the wheel . Just measure the circumference as described above . Dave Link to comment Share on other sites More sharing options...
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