BAlford Posted September 29, 2007 Share Posted September 29, 2007 I think that there is a device sold by: http://www.dakotadigital.com/ that connects to the distribtor of a V8 that makes a digital dash speedometer red correctly. Or maybe it was a 90 degree drive with a changed ratio that makes the speedometer read correctly. I have forgot which is it. Quote Link to comment Share on other sites More sharing options...
wheelman Posted September 30, 2007 Share Posted September 30, 2007 You are thinking of the tachometer not the speedometer. If you swap a V8 into a Z but retain the same speedometer drive gear ratio the stock speedometer will read correct. I was able to do this when I swapped the LT1/T5 combo into my Z, an added complication for me was I also swapped the differential. But the speedo is based solely on the revs of the drive shaft per mile traveled. Using that, which is calculated from the tired diameter and rear end ratio, you can determine which speedometer drive gear to use. Wheelman Quote Link to comment Share on other sites More sharing options...
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