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Trying to figure out how to make Z31 VSS work on 240ZT w/Z31


Guest Ian turbo240

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Guest Ian turbo240

Well, I've converted to the Z31 fuel injection system, and I'd like the VSS hooked up so that the MAS burn off cycle will work correctly. I went to the junkyard today and blew $40 on a 300ZX instrument cluster and disected it. The VSS is a really simple thing. All it is is a magnetic switch that is mounted near the speedo magnet. As the magnet passes by on its revolution, it turns the switch on/off. The switch is cycled twice per revolution of the speedo cable. Anyway, I tried to mate the 300ZX guts to the stock 240Z speedo without success. Now I'm considering using the digital dash VSS and converting to a digital speedo. I saw one in Summit made by Nordskog. The problem is that I don't know if the Nordskog speedo will interface with the 300ZX digital dash VSS. I think I'm gonna call Nordskog and find out what kind of triggering device is required before I spend $129.95 on the gauge. Any info on this would be appreciated. Thanks!!!

 

Ian

 

BTW, I dissected a 280ZXT speedo in the junkyard, and decided that it wouldn't work either.

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Guest Ian turbo240

I'm using an '85 computer and '84 wiring harness. That was what was available in the junkyard at the time. I checked over the wiring diagrams to make sure that they were the same.

 

Ian

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There's a much more simple solution to this and I can build you a little circuit that will handle it if you are interested for cheap.

 

It won't require a certain amount of rpm or mph to be reached, but in most cases it's not necessary to check those things. If you'd like I can start working on something and I promise I can get something less than $20 made up for ya that will be easy to wire in.

 

mafheated2.jpg

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