eyefi Posted July 3, 2002 Share Posted July 3, 2002 my car has been delimited at sometime (it goes way past 120) but i cant find any SLD box. where is this usually located? ive had all the dash and centre out, nothing. ive looked in the main ecu area, nothing. my speedo is a uk spec unit (or so i was told, how can i check this?), and my odo reads in miles (it says miles next to the reading). my active spoiler drops at about 50mph but my steering feels a little light at speed (this could b tracking). im also convinced the auto box ecu isnt been fed the correct signal (this just could be my imagination). kickdown could b more instant and it seems to go into 1st too often when 2nd would b better (eg. when slowing down, not quite stopping then carrying on, it goes to 1st for maybe a second, then up into 2nd etc etc). im interested (at least out of curiosity) to find out how my car has been delimited. any ideas how this has been done anyone. ta Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted July 4, 2002 Share Posted July 4, 2002 A number of things there...... 1: I assume it's a Jap import. 2.1: Speedo reads 0->180MPH with a smaller KPH inside this? This is a UK Spec speedometer dial. 2.2: If it says 0->180MPH and no smaller KPH scale then goto 10: 3.1: Odometer reading in MILES...... 3.2 could mean the Jap ones been converted to MILES by the simple method (described on my web pages) or the harder method (also described on my web pages) 3.3 The odometer is a replacement UK spec unit. 4.1: A UK Spec or modified (via the hard way) Jap spec odometer would interpret the speed signal correctly for Miles. 4.2 A Jap spec odometer with just the MILES ledgend (easy way) modified will interpret the signal in Km but should have a speedo converter box fitted to modify the signal. 4.3 Whether it's UK ir Jap spec they will all output the same signal as the input. i.e. a buffered wheel speed sensor signal. 5: If the active spoiler drops at 60mph (not 50?) this suggests its getting the original wheel speed sensor information thus NO converter is fitted. 6: The speedometer doesn't affect anything so you could remove it and all the other stuff will still work. 7: The odometer affects EVERYTHING! Modify that and the whole car is modified. 8: Does Cruise Control operate above 70MPH? If so then the signal has been modified somewhere between the odometer and the cruise control. 9: If you have no speed limiter then the signal MUST have been modified somewhere after the odometer? 10: A final thought would be that the wheel speed sensor signal has been modified at source (at the gearbox sender unit) and all the signals are scaled by 5/8ths. 11: This would mean the UK Spec Speedo is infact a Jap spec with a UK STYLE dial face? Can you give us some more clues? It's really hard to say without seeing it but converters are usually only fitted at...... Gearbox sender Attached to speedo Behind speedo/odometer cluster attached to ECU I've not see then anywhere else. Pete Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted July 4, 2002 Share Posted July 4, 2002 Originally posted by TRL Performance 2.1: Speedo reads 0->180MPH with a smaller KPH inside this? This is a UK Spec speedometer dial. 2.2: If it says 0->180MPH and no smaller KPH scale then goto 10: Pete, why should 2.2 send you past all the other questions? Isn't that going to be a Jap speedo with the signal converted and the KMPH label "modified" to say MPH. I think this is how most of them are done. Very good post though Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted July 4, 2002 Share Posted July 4, 2002 Ummm. Yes I see your point. Maybe I'll just say..... 2.2: If it says 0->180MPH and no smaller KPH scale then you have a Jap dial mechanism underneath with a replacement dial face and thus a speedo converter unit fitted to the back of the speedo OR attached to the wiring loom for the odometer and speedo. OR attached to the gearbox sender. What I cannot get just yet is if there is NO speed limiter then this suggests there is a modified signal (scaled or clamped) going into the ECU. The ECU is fed by the odometer but in series with this is the active spoiler and cruise control and it was mentioned that the active spoiler operates at 50MPH (Which is odd as it should be 60mph, or more accurately 90KPH which is about 62?MPH) If the signal to the active spoiler is the non-modified version (which it does seem to be as the spoiler is operating normally) ....... then where is the converter for the ECU??? Going around in circles :-) Pete Quote Link to comment Share on other sites More sharing options...
eyefi Posted July 4, 2002 Author Share Posted July 4, 2002 she is a jap import. cruise control does not work above 70mph, im not sure of its lower limit, but it does work at 30mph. my speedo dial is large mph with a small kmh. the active spoiler deploys at around 50mph, so it most probably is 62mph. ill check how the odo is converted tonight, ill compare to the photos on yr web site. from what uv said pete, it sounds like the delimiter should b around the ecu. ill have another look tonight. does the auto ecu take a signal from the odo or the main ecu? thanks Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted July 4, 2002 Share Posted July 4, 2002 does the auto ecu take a signal from the odo or the main ecu? All from the odometer Pete Quote Link to comment Share on other sites More sharing options...
eyefi Posted July 8, 2002 Author Share Posted July 8, 2002 ive found my SLD! its a greddy SLD. it was wired to the ecu. very neatly done and hidden under the little ecu on the left. this being so the delimiter should not be affecting the gearbox at all. is that correct? what does this box do? does it just clamp the speed sensor value at under 120? it would seem to me that this method of speedo / odo conversion and delimiting is a considered and proffesional conversion. can anyone see any flaws in this setup? ta Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted July 10, 2002 Share Posted July 10, 2002 Speed delimiting should be done by clamping the speed signal just below the speed limit threshold, this elliminates any possibility of the auto gearbox being affected. This is what the TRL SLD does and I believe the Greddy and HKS SLD's also. By using the 5/8ths scaled output this is fine for Manuals (non have complained or experence problems) but not for Autos. We'll have a chat at Billing, it's only just over a week away. If you are at all worried by the SLD then remove it and see if the gearbox affects dissappear. Pete Quote Link to comment Share on other sites More sharing options...
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