Andy said:i think one company makes 3.90s
turbocody said:right now i have 3.42's, but i want to keep my gas mileage up.but when i'm on the highway doing 65,it struggles in OD and kicks down to 3rd and pulls.i want alot more low down grunt power and gears would help but this truck is driven every day. i'm probably going to go with some 3.73's down the road, but my question is would all the mods listed above help me out? i mean, the cam alone is probably worth a solid 15hp-15-20Tq right?
thanks,
Cody
03 Sierra
87 T(400hp sleeper)
diamondd2 said:2. Get an LT1 or LS1 electric fan and have someone like nelsonperformance program your PCM to control the fans, they also supply the wiring harness for this setup--a real plug and play. This is said to free up about 10-15hp and 15-20tq. Will also increase MPG's.
2005 models have e-fansjebx said:I would not reccomend for towing. There is no way that an electric can pull the same amount of air as the old belt with the engine wound up a little. Some of those long steep grades can humble the toughest truck anyday. On a long hill power is an issue, but heat can be a bigger one. At least if you are cool you can keep going even if only in first gear. Remember, they had to design these trucks for the what if situation. The majority of people woudl be more than sufficient with electric fans, but when towing at capacity, those few people who do that can't get away with it. I really sincerly think that if they were as good more manufacturers would use them. As far as I know not one major brand of fullsize trucks uses electric fans from the factory. There must be a reason other than it has always been that way. Especially with the HP race that has been going on between each brand. With the intended use, towing, I would not reccomend this modification.