...And if my speedo has been corrected can that only have through a PCM tune? I'm trying to find out really if I need to get a tune for the PCM to see if I can get a little more hp/tq out of the z. I'm just wondering that if there isn't a custom tune done and I wanted to get one done how would they be able to tune the PCM if I don't even know the specs on my cam or even the brand, I know or have figured out the specs for all the other mods.

 

You may do it that way and I might do it that way, but the original poster said he drove in 3rd gear.... so I gave him the numbers for 3rd gear.

 

There are "speedo correction modules" that used to be available, to insert in the wiring for the VSS, or you could use something like the Dakota Digital speedo interface:

http://www.dakotadigital.com/index.c...rod/prd126.htm

 

Wow, I didn't even realize that he had a T56, my bad. My mistake, lol.


Redo your 70mph run, but in 4th gear, again my bad.

 

Ok going out for a little drive and will check the rpm's at 70 in 4th. Thanks guys.

 

Ok at 70mph in 4th rpms are 4500-4600

 

You should really do the other thing that I said to do.

 

'Cause all that 4th gear thing tells you is that you have 4.50something gears IF EVERYTHING in the tune is correct.