[FlyByNight]

So, I've been playing around... and I get a lot of weird results. 3.3 at 2500rpm in track mode. 3.8 in auto mode at 2200 but with 3 people in the car.


Curious as to what the best launch control setup is... including suspension, brake pressure, rpm at launch, etc. Thanks guys!

 

[Car-Guy]

I haven't played around with launch control at all, "yet", but my first power braking run was 0-60 in 3.1 and the 1/4 in 11.5 @ 119. That was done in track mode with about 2000 to 2200 rpm power braking. Since that was done on my first serious attempt, I'm sure I can do better with some practice and under better conditions.

 

[Car-Guy]

OK, I've only done 7 or 8 runs so far but my best times have been with traction control off, and in track mode. However, with all 4 wheels initially slipping/ spinning it's limiting my 0-60 times to 3.3 to 3.4 range (worse has been 3.5 and that was in auto mode w/o any power braking) "But" I have found (duh) that if I launch from a concrete surface (rather than asphalt) I don't get nearly as much wheel spin and I can get 3.1. (I guess that's surface prep in the real would :wink2. Also, similar to my SRT's, I am seeing my best times with cooler air temps. I'm also wondering if there are better street tires for launching?

Next, I think I'm going to try some Sunoco 260GT or Plus and see if that makes any difference. Or maybe just add an octane booster? Anyone have any experience with either a higher octane fuel or octane booster?

 

[jtpollock]

My best 0-60 time was also in track mode and no launch control (3.0) ... best time in launch control was (3.4), maybe I'm doing something wrong.

 

[JMS935]

My best 0-60 time was also in track mode and no launch control (3.0) ... best time in launch control was (3.4), maybe I'm doing something wrong.

Are you power braking this without launch control?

 

[jtpollock]

Are you power braking this without launch control?

Nope. Just turned the dial to Track Mode and stomped on the gas pedal. Posted about it (with a pic) back in December: https://www.jeeptrackhawk.org/forum/577-motorsports-discussions/2809-0-60-time-what-am-i-doing-wrong.html

I am legit curious if others are seeing big difference in 0-60 times using Launch Control

 

[WA 2 FST]

Slightly different animal, I know, but on my '15 SRT both stock and after I put a supercharger on it, I got best results just holding brake, giving a little throttle to load the drivetrain and just stomping the gas. Using LC was fun, but it usually was .1-.2 slower on that vehicle (and it was a 0-60 in 3.6-3.8 with the supercharger).

I have not tried LC on my TH yet (have heard the cruise control recall issue may create the same problem when using LC, so that has me a little nervous). I did make some runs pre 500 miles, and now I'm at 615 miles. In TRACK mode, 0-60 in 3.4-3.5 in 85^F heat and a full tank of gas, just holding the brake, revving to ~1500+ and mashing the gas. Very consistent this way. I expect times to dip into the 3.2-3.3 range once the fall/winter hits and we get some temps in the 35-45^F range (assuming traction is still there on cold pavement).