looking for extra power for towing from my 05 ram 4.7L i have borla perfromance exhaust, gibson stainless shorty headers cold air intake. looking for more power any suggestions.

 

better gearing.... chips.....bigger engine....

 

chhave 3.92 gears what should i go to . what type of chip, and what about underdrive pulleys

 

Underdrive Pulleys are a waste, IMO. Since you've got the air part taken care of well (CAI, headers & cat back) assuming we are talking bolt-on here, and nothing major like headwork, etc. Then your choices for more power would be Chip/Programmer, E-Fan, 4.56 Gears & CAMS (you have 2).

As programmer choices for your '05 4.7 really suck, a good option for you would be to look into a KRC 206 CAM kit w/ custom tuning. You'd be looking at roughly 36HP and a whopping 66 Lb/Ft of Load Pulling Torque in just that mod alone!!!

In combination with what you already have, adding that CAM & Programming Pkg., E-Fan & 4.56 Gears, you'd think you dropped in a Hemi!!!

 

do you have dyno backing for those power gains? sounds like an aweful lot. Sounds like gains you would see on a 5.7 with those mods. save the money and wait for the 09 model hemi. they are being spotted testing with the tundra, so im guessing it's going to be more powerful. if you want the 4.7 still. the 09 gets a power bump too. to almost 300..