I was on the highway the other day just messing around, shifting more near the redline (s2 redline ) and at around 6500 the car lost power momuntarily and picked up again, didnt really think too much of it, then I went to the dragway yesterday and it was doing the same thing, its always around 6500 it goes up fine, then drops off for a second then keeps climbing again till redline, could it be the sparkplugs? Im using ngk bkr7es gapped at .35. Theyve been in about 7k miles ish.

 

Belt Slip

 

why only at 6500? and today its not doing it... im so lost

 

I had this happen a couple of times . I 've talked with a few others and they have had the same issue , all of us were stage 2 . I guess it's a feature of GM's great tune.

 

lol figures