rcb280z Posted February 19, 2012 Share #1 Posted February 19, 2012 Are the 77 and 78 dash gauges interchangeable? Link to comment Share on other sites More sharing options...
zKars Posted February 19, 2012 Share #2 Posted February 19, 2012 Totally. Functionally in every way. Same mounting. Connectors are the same too. There was a font change on the gauge faces, but I think that happened sometime in 76-77 transistion. Link to comment Share on other sites More sharing options...
rcb280z Posted February 20, 2012 Author Share #3 Posted February 20, 2012 Cool! Thanks Link to comment Share on other sites More sharing options...
TomoHawk Posted February 20, 2012 Share #4 Posted February 20, 2012 I thought the 78 Speedo has a thing on the back that affects the emmissions? I think it connects to the BCDD? Link to comment Share on other sites More sharing options...
rcb280z Posted February 20, 2012 Author Share #5 Posted February 20, 2012 I will check with my Z mechanic buddy today and post what I find. Thanks TomoHawk. How is your EFI system performing? Mine suck's right now! Link to comment Share on other sites More sharing options...
zKars Posted February 20, 2012 Share #6 Posted February 20, 2012 If there is additional components on the speedo, would be simple to transfer the sensor package on the back to the new one. Link to comment Share on other sites More sharing options...
rcb280z Posted February 20, 2012 Author Share #7 Posted February 20, 2012 My thoughts also zKars. Link to comment Share on other sites More sharing options...
TomoHawk Posted February 20, 2012 Share #8 Posted February 20, 2012 My EFI is working just fine. The engine isn't so happy when I try to start it in 30-degree air tho. Link to comment Share on other sites More sharing options...
rcb280z Posted February 20, 2012 Author Share #9 Posted February 20, 2012 Do you have strick smog laws out there in Ohio? We do here in CA. 0.5% CO at idle and part throttle. That is really lean for my Z. And it is stock. Link to comment Share on other sites More sharing options...
TomoHawk Posted February 20, 2012 Share #10 Posted February 20, 2012 Yes, there are smog laws, but no smog ether. Ohio has beautifully clean air, unless you live downwind to a cow-barn or pig-barn. Link to comment Share on other sites More sharing options...
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