post #3 is my old setup new ETP 215 heads milled to 54 cc T.I valve's went from 115 grams to 70ish and 50deg valve job and 55 deg valve job

https://ls1tech.com/forums/dynamomet...c-inch-na.html

 

you might get a kick out of this:
I lose so much power over 5500 that I had to shift at

wait for it.....



6100. It goes slower anywhere else. sooooo this cam has a powerband of 4500-7500, and I peak hp around 5600 with the LS1 intake, think there is a little more in it??

I want to shift around 7100 when I get the intake on it

 

I shifted mine as high as 7300 but I went slower. Mine liked 6800 it's a matter of shift timing and how far the rpm falls on shifts to really find the sweet spot