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Forum: Technical Service Bulletins & Recalls   08-04-2015, 03:53 PM
Replies: 29
Views: 2,252
Posted By randycat99
Got my recall notice in the mail a few days ago....

Got my recall notice in the mail a few days ago. I'll be waiting for the "parts available" signal, too...
Forum: General Challenger Discussion   08-04-2015, 03:49 PM
Replies: 15
Views: 390
Posted By randycat99
For those who are truly concerned about open diff...

For those who are truly concerned about open diff or not, practice putting down some rubber in a straight line from a stop. You'll notice the open-diff puts down 2 black stripes just fine. If you can...
Forum: 2015 Challenger Information & Discussions   08-03-2015, 06:07 PM
Replies: 81
Views: 10,026
Posted By randycat99
The answer to this is very simple (as I have...

The answer to this is very simple (as I have stated multiple times). If you turn hard in this car and put the power on, while the TC=default on, you will get an engine stutter (torque management) and...
Forum: 6.4L / 392ci (2011 - ?)   08-01-2015, 05:01 PM
Replies: 60
Views: 22,385
Posted By randycat99
During hot summer weather, feed it all the octane...

During hot summer weather, feed it all the octane you can get your hands on (93). Doesn't matter what the manual says. You'll know it is seriously dragging when it gets heatsoaked, if you are feeding...
Forum: 6.4L / 392ci (2011 - ?)   07-30-2015, 06:41 PM
Replies: 151
Views: 7,382
Posted By randycat99
NOOOOOOO!!!...he employed sales-guise??? :p

NOOOOOOO!!!...he employed sales-guise??? :p
Forum: 2015 Challenger Information & Discussions   07-29-2015, 07:11 PM
Replies: 81
Views: 10,026
Posted By randycat99
Of course, they do. It's just not at the...

Of course, they do. It's just not at the forefront that you suggest it does. All the "action" is up at the engine, for certain.

Early upshift, lock-up disable, and 2nd gear launches are more in...
Forum: 2015 Challenger Information & Discussions   07-29-2015, 05:08 PM
Replies: 81
Views: 10,026
Posted By randycat99
I'm afraid you're making this way more...

I'm afraid you're making this way more complicated than need be. All that stuff you listed above surely does modify shifting behavior...doesn't really have much to do with "torque management" in...
Forum: 2015 Challenger Information & Discussions   07-29-2015, 02:16 PM
Replies: 81
Views: 10,026
Posted By randycat99
I don't know how you came up with that, at all....

I don't know how you came up with that, at all. The most efficient way to manage torque is to modulate the very thing that is generating it...the engine. Address it at the source. That should seem...
Forum: 2015 Challenger Information & Discussions   07-29-2015, 11:53 AM
Replies: 81
Views: 10,026
Posted By randycat99
...but in the end, the same outcome is enacted...

...but in the end, the same outcome is enacted via independent braking. That's what I was getting at...there's no outcome where you are just left sitting still with one spinning tire.

It doesn't...
Forum: 2015 Challenger Information & Discussions   07-29-2015, 08:57 AM
Replies: 81
Views: 10,026
Posted By randycat99
Yes, the capability is "there", but that doesn't...

Yes, the capability is "there", but that doesn't mean that is how the system actually behaves in practice. What I'm telling you is what happens in real use.

In real use, the changes to power...
Forum: 2015 Challenger Information & Discussions   07-29-2015, 08:45 AM
Replies: 81
Views: 10,026
Posted By randycat99
I'll say it won't do a thing for your launch...

I'll say it won't do a thing for your launch unless you have uneven traction conditions (water on one side, for example) that would make one tire slip much earlier than the other. In that scenario,...
Forum: 2015 Challenger Information & Discussions   07-28-2015, 10:01 PM
Replies: 81
Views: 10,026
Posted By randycat99
Never seen that in action (what you describe is...

Never seen that in action (what you describe is going on in the transmission of the automatic). If TM or traction-control is in play, typically it is all happening in the engine (timing/throttle)....
Forum: General Challenger Discussion   07-28-2015, 09:41 PM
Replies: 241
Views: 10,407
Posted By randycat99
It will be interesting to explore if there are...

It will be interesting to explore if there are significant design and operational differences between GM's A8 and ZF's A8... Off the top of my head, I wonder how the ratios compare and how/when the...
Forum: General Challenger Discussion   07-28-2015, 09:36 PM
Replies: 241
Views: 10,407
Posted By randycat99
I wouldn't liken an automatic transmission to any...

I wouldn't liken an automatic transmission to any of those things (self-driving automation)...so no need to worry about loss of fun. ;)
Forum: 2015 Challenger Information & Discussions   07-28-2015, 02:00 PM
Replies: 81
Views: 10,026
Posted By randycat99
I don't think that's true, either. Keep the TCS...

I don't think that's true, either. Keep the TCS entirely on, stomp the pedal in 1st...the tires will spin quite freely on the auto as long as you stay in a straight line (just won't let you redline...
Forum: 2015 Challenger Information & Discussions   07-28-2015, 01:26 PM
Replies: 81
Views: 10,026
Posted By randycat99
I don't think that explanation has anything to do...

I don't think that explanation has anything to do with it. Both tires are getting good rolling contact on 0-60 and 1/4 mi operations, regardless of the type of differential. There's no reason for a...
Forum: General Challenger Discussion   07-28-2015, 09:07 AM
Replies: 241
Views: 10,407
Posted By randycat99
Somebody already posted a link to an rpm to speed...

Somebody already posted a link to an rpm to speed calculator, didn't they? Shouldn't it be simple enough to figure out 5th gear redline from that?
Forum: General Challenger Discussion   07-27-2015, 08:51 PM
Replies: 241
Views: 10,407
Posted By randycat99
The counterpoint to this is that it can be argued...

The counterpoint to this is that it can be argued that the Tremec 6-spd may not necessarily be on par in design with Porsche's manual, either. ;) You know I would have to chime in on this. :p
Forum: General Challenger Discussion   07-26-2015, 07:21 PM
Replies: 241
Views: 10,407
Posted By randycat99
The M6 is a 4-spd plus 2 overdrive gears. It's...

The M6 is a 4-spd plus 2 overdrive gears. It's actually remarkable you were still gaining speed with the first overdrive gear (5th). Usually, the 1:1 gear is the last gear that you can effectively...
Forum: 6.4L / 392ci (2011 - ?)   07-25-2015, 06:03 PM
Replies: 151
Views: 7,382
Posted By randycat99
Sounds good! What about after summer when the...

Sounds good! What about after summer when the engine wakes up with better air?

I know on my car, there is a pretty substantial difference in how much throttle I can put down when it comes to the...
Forum: 6.4L / 392ci (2011 - ?)   07-25-2015, 02:39 PM
Replies: 151
Views: 7,382
Posted By randycat99
I'm thinking anybody with one of those 0-60/qtr...

I'm thinking anybody with one of those 0-60/qtr mi timer/track companion devices (sometimes part of an aftermarket tuner head unit) ought to be able to capture suitably accurate data, assuming it can...
Forum: 6.4L / 392ci (2011 - ?)   07-25-2015, 02:20 PM
Replies: 151
Views: 7,382
Posted By randycat99
3rd in the A5 is essentially like running 5th in...

3rd in the A5 is essentially like running 5th in the A8.
Forum: 6.4L / 392ci (2011 - ?)   07-25-2015, 11:50 AM
Replies: 151
Views: 7,382
Posted By randycat99
Also meant to follow-up with another question,...

Also meant to follow-up with another question, EricG...how much % travel on the throttle do you figure you are now able to put on your A8 to get the hook-up on hard launch, with the DR's?
Forum: 6.4L / 392ci (2011 - ?)   07-25-2015, 08:28 AM
Replies: 151
Views: 7,382
Posted By randycat99
Thank you for this info point. The real...

Thank you for this info point.

The real test to really quantify the 1st gear effect (if anybody with such hardware is listening), is to start collecting g-meter (acceleration) traces on 1st gear...
Forum: 6.4L / 392ci (2011 - ?)   07-24-2015, 06:41 PM
Replies: 151
Views: 7,382
Posted By randycat99
I think that's where you have a key piece of info...

I think that's where you have a key piece of info to contribute in this particular discussion. Clearly you upgraded to DR's for a reason, right? So it stands to reason that it wasn't hooking up as...
Showing results 1 to 25 of 250

 
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