philw99 Posted May 3, 2018 Share Posted May 3, 2018 Finally it appears i have my BMW 420G gearbox working in the Supra, for the next step I’d love to get the speedo working and in turn the odometer working again. Does anyone know what other people have done to solve this problem? Looks like the DAKOTA DIGITAL SGI-5E box could help here? just trying to understand what’s best to interface with, the speed sensor isn't in the gearbox anymore so need a new source. Should I be investigating getting one fitted to the drive shaft? Was looking at GPS speedo’s but they aren’t cheap My long term goal was to fix this when I change to an aftermarket ECU, however would be nice to get this fixed now. Any help greatly received Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 8, 2018 Share Posted May 8, 2018 You could probably use a buffer amp and get a speed signal from a front ABS sensor, assuming you have ABS. or put a star wheel on the back of the propshaft and fit a Hall effect sesnor so you have a digital signal to work with. It all depends what the gizmo expects in terms of analogue or digital, and pulses per wheel rotation. Quote Link to comment Share on other sites More sharing options...
Ecosteve Posted May 21, 2018 Share Posted May 21, 2018 Also have this issue. I have a cheap gps Speedo now but looks crap in the car. Be nicer to get the oem dash working with it Quote Link to comment Share on other sites More sharing options...
philw99 Posted February 20, 2019 Author Share Posted February 20, 2019 just for more information on this thread, the DAKOTA DIGITAL SGI-5E box worked in the end Quote Link to comment Share on other sites More sharing options...
AC93 Posted February 20, 2019 Share Posted February 20, 2019 Good to know, my Supra is in the garage now having a 420G fitted. Looking at what ECU to go for next as the NA-T kit gets ordered Quote Link to comment Share on other sites More sharing options...
philw99 Posted February 20, 2019 Author Share Posted February 20, 2019 who's doing the install of the 420g? after someone to look at mine Quote Link to comment Share on other sites More sharing options...
Wez Posted February 20, 2019 Share Posted February 20, 2019 Sounds interesting, what is needed for the swap? Quote Link to comment Share on other sites More sharing options...
philw99 Posted February 20, 2019 Author Share Posted February 20, 2019 i'd used this http://pmcmotorsport.com/pmc-gearbox-adapters.html It's very DIY, no instructions to follow Quote Link to comment Share on other sites More sharing options...
Shane Posted February 22, 2019 Share Posted February 22, 2019 The ecumaster det3 works well as a cheap speedo convertor. Nice thing is it can do other stuff too. http://www.mkivsupra.net/vbb/showthread.php?351116-speedo-issues-after-1uz-conversion&highlight=shane Long thread...but basically the det3 has the ability to multiply a signal from whatever sensor you can tap into and provide an output close to what you need. It does other stuff too but if you want to use it just as a speedo convertor you can hook it up with just 5 or 6 connections. Software is as simple as abc and runs on most pc os's via usb. Quote Link to comment Share on other sites More sharing options...
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