SkyJawa Posted August 4, 2003 Share Posted August 4, 2003 Right - I've had my car since fri and over the weekend its apparant that the speedo is way out at motorway speeds. Its just about ok up to about 50mph, but 85 reads 95 etc! The odo was converted too - now ticks up in miles from the point it was converted at. However, cruise is topping at 70 - as it does - so I guess the speed sensitive steering is out too. I have no active spoiler due to the replacement front bumper so no probs there. Now - if I get the current conversion taken out and the TRL one put in, is it likely to make the speedo work more accurately than the existing one? And will it sort the steering/cruise too but still leave the odo ok carrying on reading in miles as it does now? Cheers chaps Link to comment Share on other sites More sharing options...
Guest Martin F Posted August 4, 2003 Share Posted August 4, 2003 The TRL speedo converters are adjustable if needs be, IIRC. Link to comment Share on other sites More sharing options...
SkyJawa Posted August 4, 2003 Author Share Posted August 4, 2003 Cheers Martin I'll fire an email off to them then and see whats what Link to comment Share on other sites More sharing options...
Piran Posted August 4, 2003 Share Posted August 4, 2003 The TRL DSC should be able to do all of the above - however when I got my supra I found the speedo was out by 10mph across the board this was due to the garage misfitting the needle when on the speedo when they put an mph dial on but this did give me an excellent excuse to replace the dials "well I'm going to have to take the needle of to correct it ... and I'll want to put custom dials on one day so if I do it now I'll save time and only have to get the needle off once..." seemed to work well Link to comment Share on other sites More sharing options...
THOR Racing Posted August 4, 2003 Share Posted August 4, 2003 I found the speedo was out by 10mph across the board this was due to the garage misfitting the needle when on the speedo I can correct for offset errors as well. But this would be a special and in most cases cheaper to replace the needles correctly (provided you have the skills) Regards Pete Link to comment Share on other sites More sharing options...
SkyJawa Posted August 4, 2003 Author Share Posted August 4, 2003 Hi Pete! Saves an email! So just to clarify, your little box of wonder will allow the cruise to work (more than 70 anyway!), and the steering too, and still allow the odo to carry on reading in miles as it does at the moment as its been converted. How about my speedo - do you think the DSC will work better than my current conversion so that it reads the right speed? As I said, its fine up to about 50, then goes a bit pair shaped! Can you recommend anyone round the surrey/hants/berks area thats good at fitting it? Cheers Neil Link to comment Share on other sites More sharing options...
THOR Racing Posted August 4, 2003 Share Posted August 4, 2003 allow the cruise to work (more than 70 anyway!), and the steering too, and still allow the odo to carry on reading in miles Most of that is down to correct installation and wiring! My box has the correct outputs and with correct/proper wiring everything that's meant to be will be do you think the DSC will work better than my current conversion so that it reads the right speed? As I said, its fine up to about 50, then goes a bit pair shaped! Don't have many complaints about them, as for any better? Umm. If you're saying that after 50MPH you start to get more and more notiveable error then this sounds like a percentage error offset. i.e. at 50MPH it's reading 55 or at 100 it's ready 110. (10% say for example) This is a PERCENTAGE error that the box can correct. The box can correct OFFSET errors but only with me changing the software inside so it's not a stock unit. Please note: All speedos are inherently inaccurate. Make sure you're not just seeing it's natural non-linearity. and as for installers..... I don't know, used to be me when I worked in Camberly but not any more We're now in Exhall (North Coventry). Regards Pete Link to comment Share on other sites More sharing options...
SkyJawa Posted August 4, 2003 Author Share Posted August 4, 2003 Good stuff - I'll get it done properly then! I have a road angel that reads my speed in GPS and the needle/speedo vs road angel is fine up to about 50. Then at 60 its really 55, 70 is really just over 60, 80 is 70, 95 is 85, 100 is 90 etc, not been faster to see how more out of sync it gets.............. Link to comment Share on other sites More sharing options...
Jake Posted August 4, 2003 Share Posted August 4, 2003 Originally posted by HISUPE Good stuff - I'll get it done properly then! I have a road angel that reads my speed in GPS and the needle/speedo vs road angel is fine up to about 50. Then at 60 its really 55, 70 is really just over 60, 80 is 70, 95 is 85, 100 is 90 etc, not been faster to see how more out of sync it gets.............. reading 100 @ a true 90mph is perfectly normal and as designed on nearly all cars. I fitted the DSC I got from TRL myself, and I'm hopeless at electrics usually. The trl provided instructions were excellent, honestly mate you can't go wrong, go for it. Link to comment Share on other sites More sharing options...
SkyJawa Posted August 4, 2003 Author Share Posted August 4, 2003 Hi Dunk, I guess your right - the reason it seems weird is my Pug GTi reads almost on the nail at the same kind of speeds! I probably would be able to do the fitting myself, its just where the other conversion stuff has been put in, to remove that before the DSC would go in that would bother me, hence getting it fitted! Also found my bl00dy rear fog light (they did it via the brake light mod) is not working! Link to comment Share on other sites More sharing options...
Jake Posted August 4, 2003 Share Posted August 4, 2003 Originally posted by HISUPE Also found my bl00dy rear fog light (they did it via the brake light mod) is not working! [rant] Good! http://www.duncandriver.btinternet.co.uk/Smilees/soapbox.gif Damn things should be banned imho. Half the tossers on the M27 use them when it rains a bit. They've usually still got them turned on 3 days later too. [/rant] Link to comment Share on other sites More sharing options...
SkyJawa Posted August 5, 2003 Author Share Posted August 5, 2003 LOL - I rarely ever turn it on, and only when the traffic conditions are so bad it warrants it!!! However, having a none functioning rear fog is an MOT fail is it not, so I'll have to get it sorted! Link to comment Share on other sites More sharing options...
Jake Posted August 5, 2003 Share Posted August 5, 2003 Originally posted by HISUPE LOL - I rarely ever turn it on, and only when the traffic conditions are so bad it warrants it!!! However, having a none functioning rear fog is an MOT fail is it not, so I'll have to get it sorted! didn't the car come with a new MoT then ? no rush. Link to comment Share on other sites More sharing options...
SkyJawa Posted August 5, 2003 Author Share Posted August 5, 2003 Yup - but I may as well get it sorted since I've only just picked it up - their prob Link to comment Share on other sites More sharing options...
Chase Posted August 6, 2003 Share Posted August 6, 2003 My cruise maxes out @70 as well, is it supposed to go higher? Link to comment Share on other sites More sharing options...
Ian C Posted August 6, 2003 Share Posted August 6, 2003 Originally posted by HISUPE Good stuff - I'll get it done properly then! I have a road angel that reads my speed in GPS and the needle/speedo vs road angel is fine up to about 50. Then at 60 its really 55, 70 is really just over 60, 80 is 70, 95 is 85, 100 is 90 etc, not been faster to see how more out of sync it gets.............. From my experience, Road Angels are not the be all and end all in speed measurement, for two reasons. First off, this year and last year at 10 of the best my clocked top speed times have been 1mph below the peak hold speed displayed on my Apexi unit. The Apexi overreading by 1mph would be because I kept my toe in a bit after the speedtrap. So as far as I'm concerned, the Apexi unit is bang on, +/-1mph accurate, even at 170mph. The Road Angel constantly underreads the speed compared to the Apexi unit, getting as far out as 4mph at speeds above 120mph. Secondly, watch the speed it displays when you are going up and downhill. The GPS signal is used to track your change in position over time on a flat horizontal plane *only*. This means that when you go uphill or downhill, your lateral speed (i.e. "as the crow flies") is 'slower' than if you are driving on the flat. Does that make sense? So the GPS based speed measurement indicates that you are going slower than you actually are. It's a bit offputting to find that the Road Angel underreads your speed in each case, meaning that if you relied on squeaking past scameras on the limit it may actually go off. Apart from that they are fantastic bits of kit though, I really like mine. Oh, and the speed display is also too slow to update, I've had 50-60mph differences with some enthusiastic braking/accelerating moments -Ian Link to comment Share on other sites More sharing options...
Guest Martin F Posted August 7, 2003 Share Posted August 7, 2003 Originally posted by Chase My cruise maxes out @70 as well, is it supposed to go higher? Yes it is. Well certainly on UK spec cars Link to comment Share on other sites More sharing options...
Chase Posted August 7, 2003 Share Posted August 7, 2003 Does it mean there might be a problem with the conversion then? My spoiler deploys at the correct speed, the odo reads in miles (no km or miles description displayed though), the speedo is in MPH, and the limiter is gone. Do you think a wire been missed/not connected? Cheers Link to comment Share on other sites More sharing options...
THOR Racing Posted August 8, 2003 Share Posted August 8, 2003 Do you think a wire been missed/not connected? Yes. Connect the cruise ECU speed signal input wire to the MPH version of the speed signal. Details on my site. http://www.trlperformance.com/dsc.html Regards Pete Link to comment Share on other sites More sharing options...
Chase Posted August 8, 2003 Share Posted August 8, 2003 Cheers Pete, I'll check that out. Link to comment Share on other sites More sharing options...
SkyJawa Posted August 8, 2003 Author Share Posted August 8, 2003 Pete, Sorry about this but just trying to get my head round it as I really want to get the cruise working above 70! So if our cruise only works up to 70 then our progressive steering is wrong too or is that ok? So basically to sort the cruise we need to (from whatever conversion method has been used) splice the 5:8 signal (which we could take from the odo input?) and splice it into pin 20 on the cruise control connector? Cheers for the help! Neil Link to comment Share on other sites More sharing options...
Piran Posted August 8, 2003 Share Posted August 8, 2003 as stock (as I recall) the active spoiler and power steering etc. are driven from an output from the odometer, there is a separate line feeding the cruise control - so if your odo is in miles then your active spoiler etc. may be working at the wrong speeds -depending upon whether their input line was changed when the converter was fitted. The cruise control is a separate connection that needs making so the 2 are really independant (I've done my cruise control but left the odo in Km as it was easier to do and I didn't want to try to work out mileage with some in Km and some in miles) Link to comment Share on other sites More sharing options...
SkyJawa Posted August 9, 2003 Author Share Posted August 9, 2003 Yeah my odo now reads miles I think but still shows all the original KM's. I'm happy to leave that as it is, so I guess the odo output as shown on Petes DSC diagram should do the do as the input feed for the cruise? so just splice them together...... Be good to get this done tomorrow as I've got a 200 mile drive on Mon am and being able to set the cruise over 70 would be superb! Link to comment Share on other sites More sharing options...
atang Posted August 9, 2003 Share Posted August 9, 2003 Hi every one, I have the same problem about the speedo reading about 10mph faster, I just order a unit from TRL, I waiting for it to arrive then fitting. Link to comment Share on other sites More sharing options...
SkyJawa Posted August 9, 2003 Author Share Posted August 9, 2003 Anyone? Wanna try and attempt this tomorrow - can I just take the odo output in MPH and splice it onto the Cruise input wire? Ta - (really wanna get it sorted if I can b4 my long drive on Mon!) Link to comment Share on other sites More sharing options...
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