I got my truck back from Strictly Performance this week after parts were installed and truck was dynoed. My mods were 2# upper, 4# lower, LFP LT's and mid pipes, magnaflow mufflers w/x pipe, cone filter, and psp flip chip with cold/warm weather street tunes. The new mods were the 4# lower, LT's and pipes, and chip.

On the "on" (cold weather prog. im assuming) side of the chip:
383 hp/506 tq @ 3960 rpm
11.3 a/f

On the "off" (warm weather prog. im assuming) side of the chip:
400.1 hp/ 521 tq @ 3960
10.9 a/f

The numbers seem low to me, but the guys told me that their dyno is really stingy, and that I would pick up 10-15 hp at a place like RSI here in Houston. I know the a/f is too rich. Should I see more power if I lean it up a little bit? Also, I was planning on going to the track this wednesday to get some new numbers, but am I ok to run with this a/f? I havent made many wot runs on the street, in fact I think only one. I only stayed in it up to about 70 though. It pulls like no other and feels great, I just wanna make sure it's ok to run at the track this week. What do you guys think?

 

With those a/f numbers you aint gotta worry about nothin.. Lean er up a bit to around a 11.75 or so.

Rich

 

I thought I might be ok, but on the way home from the shop I gave it a little gas to change lanes and the motor died. I had to drop it in neutral and pull over and shut her off. It ran fine after that though. I've layed into the throttle since then, and had no problems. Pulls like crazy now though. Will leaning it out a little bit give me a little more power?

 

Yes