Okay guys. Just a FYI and maybe this post will help someone.
New member. Bought a very nice low mile 2005 Ram Quad SLT 4x2 with the 4.7 and 3.92's for basic use and an occasional tow about six months ago. Well... At the start it did not tow my rig very well so I went to the on-line shops and started ordering some go-fast goods.
Here is what I ended up with:
Got the new KRC 212 cams
Got a KRC electric fan kit
Got a KRC 4.56:1 gear set
Got a factory ltd slip
Got a K&N filter
Made a cold air kit from a fog light hole in the bumper
Then I went to the dyno
Dynojet dyno showed poor results. 180 HP @ the wheels / 200 TQ. About 15-20 max gained over stock HP and actually lost 2 ft lbs TQ.
The AFR was super lean at WOT up top too.
Anyhow I figured that the 4.56 gears were messing with the dyno numbers or something and continued to drive the thing anyhow. The truck felt great around town but no more than what I would have expected out of the gear swap alone.
Talked to the guys at KRC and they said they could reprogram the ECU for towing but I did not do that.
Then I went on a big tow - for 1100 miles.
The truck got it done (at 9.5 MPG) but it was a struggle. I know these are higer rev engines but heck, it would not make power without downshifting two gears (in tow/haul mode). Then it ran pretty well, but it was near 4000 RPM to do so (@ 67MPH +/-).
My trailer was empty but enclosed (22ft 3500 or so lbs) I cant imagine how it would have been with a 3000 lb car in it.
That about did it for me. I went looking at the new Dodge line up with the lifetime warrantys and all. I got a '07 Hemi 4x2 (big rebates and they gave me more than I paid for the '05 six months ago), but was eyeballing the Diesel (they had a 2005 used 5.9 sitting right there).
So now my 4.7 sits on the lot and no one has any idea it has all that cool stuff on it.
I liked that 4.7 truck and I tried like heck to make it work for me. Now I just hope the Hemi works out so I dont have to trade for the diesel in another six months. :help:
New member. Bought a very nice low mile 2005 Ram Quad SLT 4x2 with the 4.7 and 3.92's for basic use and an occasional tow about six months ago. Well... At the start it did not tow my rig very well so I went to the on-line shops and started ordering some go-fast goods.
Here is what I ended up with:
Got the new KRC 212 cams
Got a KRC electric fan kit
Got a KRC 4.56:1 gear set
Got a factory ltd slip
Got a K&N filter
Made a cold air kit from a fog light hole in the bumper
Then I went to the dyno
Dynojet dyno showed poor results. 180 HP @ the wheels / 200 TQ. About 15-20 max gained over stock HP and actually lost 2 ft lbs TQ.
The AFR was super lean at WOT up top too.
Anyhow I figured that the 4.56 gears were messing with the dyno numbers or something and continued to drive the thing anyhow. The truck felt great around town but no more than what I would have expected out of the gear swap alone.
Talked to the guys at KRC and they said they could reprogram the ECU for towing but I did not do that.
Then I went on a big tow - for 1100 miles.
The truck got it done (at 9.5 MPG) but it was a struggle. I know these are higer rev engines but heck, it would not make power without downshifting two gears (in tow/haul mode). Then it ran pretty well, but it was near 4000 RPM to do so (@ 67MPH +/-).
My trailer was empty but enclosed (22ft 3500 or so lbs) I cant imagine how it would have been with a 3000 lb car in it.
That about did it for me. I went looking at the new Dodge line up with the lifetime warrantys and all. I got a '07 Hemi 4x2 (big rebates and they gave me more than I paid for the '05 six months ago), but was eyeballing the Diesel (they had a 2005 used 5.9 sitting right there).
So now my 4.7 sits on the lot and no one has any idea it has all that cool stuff on it.
I liked that 4.7 truck and I tried like heck to make it work for me. Now I just hope the Hemi works out so I dont have to trade for the diesel in another six months. :help: