I'm suprised as well at the lower numbers. If I'm correct, I've seen an SS make close to 290 rwhp semi-stock. Several SSs with minor mods like you have and a good tune have made 310-320 rwhp.

What was your final air/fuel ratio and timing numbers on those pulls?

 

If it at all possible, you should take a brisk 20 minute ride with logging software before you dyno tune. That would give the tuner a great baseline to look for changes. When you dyno tune only, the PCM is tuned to improve max performance only. As you drive the PCM will compare the changes made and make subtle improvements to all of the intermediate paramaters every ten minutes of drive time. That is why it may take a few hundred miles to really notice performance increases.

 

yea they drove mine around, got the numbers, then tuned it, then drove it around again. my truck doesnt shift until 6200rpm so it pulls all the way through

 

I got nothing like that. A couple of pulls on the dyno, some tuning and its done. They have offered to look at the shift point issue, but I live 120 miles away. I'm going to drive it a week or two to decide if I really want to raise the shift points to 5800 or so. I can't remember who tuned it for me, but as of this moment I am not a happy camper.

 

BigTex, I'm clueless on this and can see nothing on the dyno sheet that resembles this.

 

well they really didnt have a choice with mine since I cant get it on the dyno.

 

Thats weird because when I was there they really didn't want me to leave until they drove it. So Jayson drove it made some changes on the fly and mine shifts at 6000. What was the weather conditions?

 

Temp was upper 80s and the humidity was around 70%.

 

Jayson hooked me up today! He tweaked the tune for my new K&N filter setup and dyno numbers are: 297 HP and 317 ft/lbs. The truck is haulin' .