i got a AVO TMIC, when I install it will I need to retune my Unichhip, what types of charactersitic changes will I see if I dont retune the chip

 

Yes you will want to retune it. For the most part you will not see anything bad (detonation, etc...) but you will notice that you can get more timing advance. Probably like 2-3 degrees over stock would be a save assumption.

Also the TMIC will flow air far better than the stock TMIC. So you will have a lower pressure drop.