morgaine Posted October 12, 2003 Share Posted October 12, 2003 Hi guys, I wondered if any of you have a Jap import with a Superchip? When I got my Supe over from Japan, our local garage did the SVA mods and the chip they put in converted my clocks to mph and remove the restrictor. I also had to put in clock faces. When I got the car back the odo was still reading in kph. I queried this with the garage and they told me that a second chip was needed to do this. Is this right? I am just getting paranoid now as my hubby has just got a 300ZX from Japan and everything I'm now reading seems to say that one chip should do all. Is the Supe just different or did I get sold the wrong chip? Cheers Morg Link to comment Share on other sites More sharing options...
MR.B Posted October 12, 2003 Share Posted October 12, 2003 Ive been trying to work this one out myself. Although the odo still has km on it - it is actually now reading miles since conversion. Makes it a pig to work out its genuine milage. I think there was a post about this not so long back. Link to comment Share on other sites More sharing options...
Jake Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by morgaine When I got the car back the odo was still reading in kph. I queried this with the garage and they told me that a second chip was needed to do this.Is this right? Do you mean it's still clocking up KMs or clocking up Miles but still saying KMs on the legend? The DSC that TRL make converts the odometer to register in miles. Link to comment Share on other sites More sharing options...
morgaine Posted October 13, 2003 Author Share Posted October 13, 2003 Mine is still clocking up the distance in kph, and the readout also still says kph Link to comment Share on other sites More sharing options...
Willson Posted October 13, 2003 Share Posted October 13, 2003 Sorry for the slight off topic but....... If an import has had the clocks changed to mph face and the odo is still reading in km (stock) then why would a chip have been required (apart from deristricting) ? Been trying to work this out, as I have had a small anoyance with my active spoiler and could not locate a speedo converter when I tried to find it. Anyone ? Link to comment Share on other sites More sharing options...
morgaine Posted October 13, 2003 Author Share Posted October 13, 2003 When I had just the faces in the needle was still reading in kph, so it said I was doing 80mph when i was doing 50mph. Hence the chip. Plus, as you said, to derestrict it Link to comment Share on other sites More sharing options...
Supragal Posted October 13, 2003 Share Posted October 13, 2003 Mines still reading in kph too, very annoying. Seems to be a bit of a common theme- JIC have told me to take itback to them and they'll sort it out, shame I can't get it there!! If you got it from a dealer surely they should have sorted this for you? Or was it private? **edit- my bad, just re-read your forst post, you imported it yourself then?** Link to comment Share on other sites More sharing options...
Digsy Posted October 13, 2003 Share Posted October 13, 2003 This is one of the most frequently discussed topics on this BBS. The search function with keywords like "ododmeter" "convert" and "speedo" should help you out. Also Pete Bett's site has a wealth of information on how the speedo signal is used, and how a proper conversion should be done. Its http://www.trlperformance.com Link to comment Share on other sites More sharing options...
Steve W2 Posted October 13, 2003 Share Posted October 13, 2003 I think they use a converting box and mine still has the original dials (Kmh) but with the 'K' covered up with marker pen so it only reads m/h. The box converts the ODO and in my case removes the Km symbol on the ODO. The mileage covered up to the point at which it was converted still remains i.e 80,000KM (49,689 miles) but any mileage done in the car since the conversion, is clocked in miles. The mileage is worked out by noting the reading at point at which the conversion was done so that you can convert that figure in miles (from KM) and add it to the mileage covered since the conversion was done (in miles). If your ODO is still showing KM then I think the conversion hasn't been done properly:( Link to comment Share on other sites More sharing options...
Digsy Posted October 13, 2003 Share Posted October 13, 2003 Incidentally, unless they have changed their methods since I bought my car, JIC will not do a "proper" delimiting job: i.e. by using a speed signal "clamper". They simply convert everything using the same box so the whole car thinks it is going at 5/8 of its true speed. The TRL box does a better job than this, and is only wired into the systems that avtually need a converted speed signal. Link to comment Share on other sites More sharing options...
pulse Posted October 13, 2003 Share Posted October 13, 2003 I partially enquired about this at JIC recently. When JIC import a car, they work out the mileage from the odometer in KMs, then 'wind' it back to the correct number (so when selling your car you don't have to say "first 80k in kilometers, then 20k in miles, so although it says 100k miles it's only done 70k"). It's then changed from KMs to Miles on the display, and at least on mine they put a small sticker that says "MPH" over the "KMH" label on the speedo. At least you can check the real import/export docs to see exactly what the KMs were before it arrived here so you can see they're not trying to pull a dodgy by winding it back too far. All of mine was converted + de limited when it arrived, though. -p Link to comment Share on other sites More sharing options...
Rob Posted October 13, 2003 Share Posted October 13, 2003 My advice would be to leave it reading in Km. Otherwise you'll always be having to work out your mileage by adding miles driven, to a fixed Kilometre reading taken just before the conversion was done... and then try explaining that to a potential buyer in the future. i.e. conversion to Miles won't totally convert the odometer reading, it will just start adding Miles to the Kilometres already driven. If that makes sense. Link to comment Share on other sites More sharing options...
Willson Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by morgaine When I had just the faces in the needle was still reading in kph, so it said I was doing 80mph when i was doing 50mph. Hence the chip. Plus, as you said, to derestrict it This is what I'm getting it. Was the face a proper mph one ? Surely the travel of the dial is the same ie. 180mph is all the way round. or not ? maybe a stock import speedo only goes up to 140 ? Link to comment Share on other sites More sharing options...
morgaine Posted October 13, 2003 Author Share Posted October 13, 2003 Supragal - yes, I did import it myself. Fortunately this is the only problem I have had Steve W2 - I think you're right Darren - cheers m8 will check out Pete's site I think I want my odo to be wound back if possible though - I've got my original docs and mileage stuff still to prove it's legit, it would just look a lot better than 117,000! Cheers all Morg Link to comment Share on other sites More sharing options...
Supragal Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by Darren Blake Incidentally, unless they have changed their methods since I bought my car, JIC will not do a "proper" delimiting job: i.e. by using a speed signal "clamper". They simply convert everything using the same box so the whole car thinks it is going at 5/8 of its true speed. The TRL box does a better job than this, and is only wired into the systems that avtually need a converted speed signal. Ok, now i'm lost..... thats a bit too top level for me, need more knitty gritty!! Link to comment Share on other sites More sharing options...
Digsy Posted October 13, 2003 Share Posted October 13, 2003 Ok, SG. Since its you. There are two ways to fool the ECU and delimit the Supra: 1) Take a 5/8 pulse train divider (for every 8 speed pulses in you get 5 pulses out - almost the same as the conversion factor from km/h to mph) and wire it into the speed signal wire before the odometer (this is pre-facelift we are talking about). The odo takes one speed signal in and re-broadcasts it to the entire car (active front lip, cruise control, speed sensitive PAS, auto box [if fitted], speedo and ECU). If you do it this way then the whole car thinks it is actually going at 5/8 of its true speed, so it never thinks it ever reaches 180kph where the limiter would normally kick in. Disadvantages: Some systems actually need an unmodified speed signal - speed sensitive PAS, front lip, and auto box. Advantages: Simple and cheap. 2) Take a device which allows the speed pulses to travel thorugh it unaltered until they reach a pre defined point, which let's say equals 179.999999 km/h. After this point, no matter how much faster you go, the device will only output pulses equivalent to 179.99999 km/h. This way, the car continues to recieve unaltered speed signals right up to 180km/h. After this point, the box should be in top, the lip will be down, the PAS will be in "fast" mode, etc. Also, since as far as the ECU is concerned you never go faster than 179.9999km/h, the limiter never kicks in. The TRL unit provides both divided and clamped outputs. IMHO, the second method is the "correct" way to do it. When I bought my car, JIC were using method one. Link to comment Share on other sites More sharing options...
Supragal Posted October 13, 2003 Share Posted October 13, 2003 Thanks buddy, thats much better! *phew* so how easy is it to convert from wrong to right? If I remove the active spoiler, does it make any difference? Oh, and do I have speed sensitive PAS? Can't say I noticed!! Link to comment Share on other sites More sharing options...
Digsy Posted October 13, 2003 Share Posted October 13, 2003 Well, my car isn't even delimited, so I can't say I've tried it for myself. However, I have had my dash apart and re-wired in my own speedo converter, plus the diagrams on Pete's site are really clear. If you can use wire cutters, weild a soldering iron, and use a hairdryer on heat shrink tubing, then you can Do-It-Yourself. Of course you must be able to use a hairdryer already. Just the wire cutters and soldering iron, then. All Supras have speed sensitive PAS. If you remove the spoiler, then it simply won't matter whether it sees an unmodified, divided or a clamped signal. I don't think anything else will be affected if you remove it. Link to comment Share on other sites More sharing options...
Supragal Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by Darren Blake Of course you must be able to use a hairdryer already. Just the wire cutters and soldering iron, then. I actually use wire cutters and a soldering iron more than I do a hairdryer Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted October 13, 2003 Share Posted October 13, 2003 rob are you saying that even if if J spec converted to say miles on the odo, chances are it is the kilometres plus the miles added on?!?! not that i bothered to much bout mine,coz guy i bought it off,got the 1996 model january 1997, so cant of done too many miles, he paid £18,000 to have it shipped over back in 1997 almost brand new,that aint bad for this type of car! Link to comment Share on other sites More sharing options...
Digsy Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by Supragal I actually use wire cutters and a soldering iron more than I do a hairdryer Don't you find that leads to terrible split ends, though? Link to comment Share on other sites More sharing options...
Supragal Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by Darren Blake Don't you find that leads to terrible split ends, though? Well, actually I found that hair drying caused that so figured using wire cutters to cut the split ends off and a soldering iron to mend the ones that are too high up to cut off seems to work a treat Link to comment Share on other sites More sharing options...
morgaine Posted October 13, 2003 Author Share Posted October 13, 2003 Hey maybe you could do my hair? I can never be bothered Doesn't last too long crawling round under cars tho does it Link to comment Share on other sites More sharing options...
Steve Cargill Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by whitesupraboy2 rob are you saying that even if if J spec converted to say miles on the odo, chances are it is the kilometres plus the miles added on?!?! not that i bothered to much bout mine,coz guy i bought it off,got the 1996 model january 1997, so cant of done too many miles, he paid £18,000 to have it shipped over back in 1997 almost brand new,that aint bad for this type of car! My Supe still has Km's on the odo and MPH on the speedo. My MR2 was changed to read miles. I got a certificate from the company that did it to say as of xxxx Km's in now read in miles. A couple of quick sums to convert the total but was OK. Note that on the Supra the Miles/Kms text display DOES NOT indicate how it is adding up. That is purely a 'light' that can be changed by a jumper on the odo unit. Link to comment Share on other sites More sharing options...
Steve Cargill Posted October 13, 2003 Share Posted October 13, 2003 Originally posted by morgaine Hey maybe you could do my hair? I can never be bothered Doesn't last too long crawling round under cars tho does it Electric clippers, No.1 setting. End of all problems :p Link to comment Share on other sites More sharing options...
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