View Full Version : Horse power gain
SCs_5th_Gen
03-27-2008, 04:29 PM
I would like to know numbers here. From a dyno what is normal stock HP of an 05 envoy 4.2l and then on with a PCM4less tune. I pull about 3000lbs of boat and trailer, and it isnt really a problem for it, just would like more power and maybe more mpg if that happens with a tune.
POWERFREAK
03-27-2008, 04:49 PM
here's a link to a dyno sheet from pcmforless...gains of about 17hp or so, but as you can see the powerband is much more even.
http://www.pcmforless.com/images/dynosheets/trailblazer.jpg
I have an 87oct tune on mine. The biggest improvement is with the tranny...much better shifting and down shifting characteristics (I would think you'd like that a lot while towing). MPG gained a little on the highway. It's $$ well spent IMO.
TBlazeruss44
03-27-2008, 06:09 PM
:iagree:here's a link to a dyno sheet from pcmforless...gains of about 17hp or so, but as you can see the powerband is much more even.
http://www.pcmforless.com/images/dynosheets/trailblazer.jpg
I have an 87oct tune on mine. The biggest improvement is with the tranny...much better shifting and down shifting characteristics (I would think you'd like that a lot while towing). MPG gained a little on the highway. It's $$ well spent IMO.