Does GM do the 4 cyl cut-out better on their V8 than 5.7 V8 MDS ?

Go do a test drive to find out.
The Chevy pickup salesman at the dealerships are VERY LONELY right now.

how GM does this technology:

http://www.autoweek.com/apps/pbcs.dl.../1041/PHOTOS01

http://www.superchevy.com/technical/...dod/index.html

sample quote:

Stephens told Meagher the new system had to switch between eight and four cylinders so seamlessly that the driver wouldn't perceive it. If Meagher's engineers couldn't get the system to work that smoothly, it wouldn't make production.

Active Fuel Management boosts fuel economy by around 8 percent in some driving situations. By 2008, GM expects to equip as many as 2 million V-8 and V-6 engines annually with the system.

The cost per engine is about $50. So far, complaints from consumers are nonexistent, according to GM and the National Highway Traffic Safety Administration, which monitors complaints about safety-related engine performance.

 

Yea they seem to be pretty much the same...MDS and AFM. Both use collapsible lifters and oil solenoids to engage/disengage them...with drive-by-wire on both helping to mask the change over.

 

Hey SevereDistortion: I have a 2007 2wd club cab hemi also. What difference did you see with the Airaid and the Magnaflow?

Which Magnaflow did you use? Duals or single CatBack? I had dual Flowmaster 50 series on my 2004 Hemi and they resonated like crazy in the cab on the highway.

 

The trans hunting is driving me insane....!!!!

 

There has been no posts on this surge since Sept 2008. Please tell me there is a cure for this annoying side effect of my new hemi, one that will still get me some mpg's. I just bought a 2007 Dodge Ram 1500. 2wd, QCSB, 5 speed auto, 3:55, 245/70/17's, all stock (I just bought it). I get the same 1650-1900 issue. I have read the previous pages 1-4 and haven't read about the following.

I have found that if I light throttle the truck to 100kmh/61.5mph the rpm's stay at 1900. If I accelerate a little harder past 100kmh and the rpms go to 2400, they fall to 1650 and stay at 1650-1700(cruise on or off at 100kmh). This is all on the same flat road.

I love the truck and the power doesn't compare to the 5.3 or 5.4, but man this will drive me over the edge.

Can someone help? Or will I be forced to drive at excessive highway speeds to get away from this?

Thanks

 

your not surging your going from 4th gear too overdrive the flatest gear in the tranny, unfortunately soon as you hit a hill she'll jump too 3k rpm too maintain your speed if on cruise, there is no getting around this unless you retune your ecm. I can asure you you will get less gas milage than what is set at the factory everyone who tunes got heavy feet and get 14 mph or less. Good luck