[MoparG]

Perhaps the 5.7's MDS (on non SRTs) will not permit that touch of whiplash when tapping the pedal of a good ol' High Performance tuned for torque pushrod V8 becuase of the .04 seconds it takes for the V8 to wake up to 8 cylinders. Since the SRT doesn't have the MDS then maybe I can hit the pedal by tapping it and feeling that "seet of the pants" momentum. Then again car magazines claim they can't feel the difference when transitioning but how can 4 cylinders feel like a torque monsters when slightly nudging/tapping the pedal. Perhaps the throttle-by-wire simiulates the onset of torque even though you don't have it but I also liked hearing the throaty moan when tapping the pedal; I bet the exhaust tricks dis-allow the sound of that.

My concern with the SRT8 his that it's torque peak is much higher and so wonder if it will be more of a beast at mid-range to high-range. I like the instant response; I used to tap the pedal of my dual exhaust 78 Malibu 305 tuned to perfection (4bbl, etc) and I would enjoy hearing the dededededededede just by slightly touching the pedal and then letting go to a much quieter sound. Are those days gone?! I guess only the carbs will do it.

 

[JSA 007]

From my ~300 miles so far, I'd say the throttle tip in is too much and I think I can feel when the 4 cylinders come back on. Basically, when rolling into the throttle it feels like there's a "dead area" before the full torque rush.

However, compared to my 20 yr old L98, any "throttle-by-wire" car will have a slower tip-in to me :lol:

 

[chargershed]

Actually, to me it feels like any Mercedes product with the slight hesitation on tip-in...during my lengthy test drive I swithced off the traction control, and it squeeled when I punched it :wink: I've owned my fair share of muscle cars, and even the best tuned had a little hesitation when bliping the throttle. Not as much as the Charger, but to me the difference is negligible...

 

[MoparG]

sounds like the tip-in blip concern can only be solved by de-activating the MDS on the R/Ts (if possible, could it be as simple as a fuse under the hood to be removed). On the SRTs, an intake manifold re-routing power down low will help no doubt (DCX admits that they cut corners with intake manifiold design and that they had to go with all out high end horsepower as a result) and a camshaft upgrade to further create low-end grunt will likely solve all tip-in concerns. Leave this to the guys at Edelbrock and Hypertech; they're likely peeing in their pants waiting to jump on this scenario.

 

[JSA 007]

In an update: I'm not sure I really can feel the MDS working. Since it comes on so fast (.04s), any change I feel is probably the transmission actually. And since it's been mentioned that Mercedes has a hesitation on tip-in, it's more likely that they did this on purpose and it's not due to MDS. So I wouldn't deactivate it!!!

Now if I could just change to a direct throttle linkage, that'd be a different story...

Seriously though, the car is awesome and I can deal with a little throttle hesitation, no problem

 

[MoparG]

that throttle-by-wire likely helps in the emissions output especially on the tip-in scenario we are talking about. The computer is probably doing quite the math at that point to minimize outputs of emissions as compared to a raw connection. I wonder who is going to be the first to install a carb on a Charger (MoPar sells carbie versions of the 5.7 in MP catalog with an advertised output of 360hp/360lbs-ft of tq). I would also like to see a classic MoPar starter instal kit for these LA-series small-block HEMIS; I want to know that I am starting a MOPAR! DCX still used them even on the 5.9L 360 V8 2003 Dodge RAMs but not on the HEMI ever; we just missed them. Dakotas all had them for sure until 2004.

 

[T/A Rumbler]

One of the things I enjoyed about my Dakota R/T was starting it up every morning, the way that 5.9L engine came roaring to life was great.

 

[adaptabl]

that throttle-by-wire likely helps in the emissions output especially on the tip-in scenario we are talking about. The computer is probably doing quite the math at that point to minimize outputs of emissions as compared to a raw connection. I wonder who is going to be the first to install a carb on a Charger (MoPar sells carbie versions of the 5.7 in MP catalog with an advertised output of 360hp/360lbs-ft of tq). I would also like to see a classic MoPar starter instal kit for these LA-series small-block HEMIS; I want to know that I am starting a MOPAR! DCX still used them even on the 5.9L 360 V8 2003 Dodge RAMs but not on the HEMI ever; we just missed them. Dakotas all had them for sure until 2004.

Why would you downgrade to a carb? Software upgrades would do more than anything else. FI is going to get more power than any carb could. The 5.7 Semi Hemi is much different than the old LA block engines.

 

[MoparG]

the new Hemi is based on the LA design. I'd say it's so highly modified, however, that it would be fair to draw a parallel to the GM Generation II LT1 vs. the original small block GM motor in terms of evolution.

The original LA was based on the 1956 Plymouth 277 polysphere motor (known as the A-motor). L stands for Light in the LA which incuded wedge heads and a shorter deck height (and was hence much smaller and lighter).