[jtpollock]

So, I got past the 500mi training wheels period and Launch Control was enabled today. However, I'm getting worse 0-60 times with LC than just mashing the pedal in Track Mode.

Mashing in Track Mode, best 0-60 is 3.0 seconds
Best time in Launch Control was 3.6 seconds

What am I doing wrong?

Only thing that I can think is that I do hear significantly more squeal and tire spin with LC, so maybe the Launch Control is just too much for the stock tires to hook up??

Any other ideas, is this a user error on my part? What kinds of 0-60 times are other folks seeing?

 

[JMS935]

That’s insane - 3.0 seconds! What tires did you get?

 

[jtpollock]

What tires did you get?

Stock tires. Seems too low, but I assume the Jeep's timer is reasonably accurate. (see attached pic)


Even if the timer is off a few ticks, I can't quite understand why my Launch Control times are slower than just stomping on the gas.


Only thing I can think is that it's not hooking up with the LC on. (the tire squeal that I'm hearing) Curious if others are seeing big difference between using Launch Control and not.

 

[Bar]

So, I got past the 500mi training wheels period and Launch Control was enabled today. However, I'm getting worse 0-60 times with LC than just mashing the pedal in Track Mode.

Mashing in Track Mode, best 0-60 is 3.0 seconds
Best time in Launch Control was 3.6 seconds

What am I doing wrong?

Only thing that I can think is that I do hear significantly more squeal and tire spin with LC, so maybe the Launch Control is just too much for the stock tires to hook up??

Any other ideas, is this a user error on my part? What kinds of 0-60 times are other folks seeing?

You're not looking for help. You're just bragging! Try a second timing source. Maybe something is off when just in Track Mode, and it doesn't pick up the start time. Either way, very impressive, and it's killing me that I only have 144 miles after 10 days.

 

[mchase]

Amazing! Have you gotten the 3.0 more than once?

 

[CrazyCajun]

Qtr mile time

Noticed that your record qtr mile seemed pretty slow compared to other posted times. Do you think those times are also inaccurate or have you not really attempted to max the qtr mile?

 

[jtpollock]

Sorry guys, I totally wasn't trying to 'humblebrag' here... when I was trying to compare the Launch Control starts with the normal mash-the-pedal starts I was routinely getting 3.3 second 0-60 times when just mashing the pedal (in Track Mode). AFAIK, the 3.0 second time only happened once (honestly that particular start felt real fast). Still, it does seem faster than the Jeep *should* go, so who knows if the in-built computer was off somehow.

My main concern and reason for asking is that the fastest time I was able to get using Launch Control was 3.6 seconds. I'm genuinely curious if folks here get their best 0-60 times using Launch Control.

If I had to hasten a guess at this point, maybe LC is a better approach for use at the drag strip and with the right tires. Probably LC is just too much umph for surface streets and stock tires. In my case, tooling around town, the fastest 0-60 times are definitely just mashing the pedal in Track Mode.

BTW: all my launches are just around town on state highways, I haven't ever done a 1/4mi or 0-100 "all out" yet. I guess I'll have to save that for track time.

 

[mchase]

Thanks for the update jtpollock. I'm still curious to see what others show in their performance window stats.

 

[Dude What Warranty?]

Thanks for the update jtpollock. I'm still curious to see what others show in their performance window stats.

3.0....GTFOH.... That's best I have seen man....should be what I am doing right not wrong......3.2 here

 

[8SecTurboJeep]

Don't launch it in TRACK mode. That obviously makes the suspension stiffer. You want a softer suspension to launch with. TRACK is made for just that.... a racetrack, not a drag strip. Setup your custom drive mode with TRANS in Track and Suspension in Street.

 

[jtpollock]

Setup your custom drive mode with TRANS in Track and Suspension in Street.

Got it. Makes sense, thanks.

I'd figured the shift points were better in Track but didn't think about the effect of Suspension stiffness.

 

[maxedout]

These things work best for me by mashing the pedal as hard and fast as you can. 60 ft times are always better. I've tried launch mode at every possible rpm then I started trying it the old fashioned way. Mash it hard! Sometimes I will get it just off idle , and I mean just off at no more than about 1200 rpm on a light brake torque and mash it. It takes that shock out of it that the launch control has and the tires grab much better. Mine always does better even with warmed up tires by just standing on it. I suppose 4 drag radials with launch control would be a great combination but wtf these are 5500 lb suv fun vehicles, not a Pro stock. Also, as some one else here said leave it soft. Doesn't make sense because it has all wheel drive but that trick works. Track mode is for road course not drag racing as far as Im concerned and I have taken on both Drag strip and a road course. It's a big can of whoop ass turning corners fast. Pitch rotation is usually needed in drag racing on a 2wd vehicle but on awd it shouldn't be needed. Seems to work out ok with a TH.
Sometimes less is more especially when you have so much power and so much weight to move.
Been Drag racing for 40 years as fast as 6:50s well over 200mph and Road racing for 25. Hold 5 Pro Licences. These TH's are by NO means a race car and truthfully I'm not sure why they were built but they sure are a whole lot of fun at stop lights

 

[beerman]

Hey guys first post here - been lurking for a few weeks with my new TH just learning. First fast car I've personally had since '94 (low 10 sec '82 Mustang) and ****! Very good friend of mine owns a prominent speed shop in MI and has a low 9 sec HC (along with several other fun cars) so I've been drooling over these engines for a couple years now. During July 4th weekend visiting family in Detroit, I pulled the trigger.

Anyway, I too have had my best 0-60 with just a light brake torque and mashing throttle. That has netted me a 3.5 in crappy 2900 D.A. Summer weather here in MN, just on a blacktop road. Best I can muster with Launch Mode is a 3.7X in similar conditions. I'll pile on using Custom mode with suspension on Street, much quicker for me than in Track, but close with Sport.

And a 3.0??!! Looking at the date of that post it was Winter in NC, any idea what the D.A. was? Or even just the temp and humidity?

 

[WA 2 FST]

^^^ agree with both you guys above. I think Launch Control is just a gimmick. It may make things simpler for some drivers, but I don't think it offers the best times.

I do run mine in Track or my Custom setup when I am going to do a serious 0-60 pull, but I think flashing the converter is a great way to get out of the hole. Seen consistent 3.4-3.5 times in 85-90+^F heat here in N. Texas. We are at 650' elevation, so I am guessing that DA is well over 1500'. If it hooks when the temps drop to 35-45^F, then I'll see 3.1-3.2s no doubt, without using LC.

 

[scottiesei]

So you guys are holding the break and just keeping resistance on for a second when mashing the gas not using launch control?

 

[WA 2 FST]

Yes... just power-braking it. Left foot on brake, right foot gets rpms up a little, then simultaneously go full throttle on accelerator and let off gas. It may seem like this wouldn't be very consistent, but it is for me.

 

[JMS935]

Sounds like most people are having issues with the launch control, so maybe there isn’t anything wrong with mine. It works as it should, which is just a gimmick at best. That’s too bad. My best time still shows 4.1, but I rarely go all out from 0-60, it’s too congested by me.

 

[Surf City Dan]

Sounds like most people are having issues with the launch control, so maybe there isn’t anything wrong with mine. It works as it should, which is just a gimmick at best. That’s too bad. My best time still shows 4.1, but I rarely go all out from 0-60, it’s too congested by me.

Just curious as to your best time of 4.1. I used launch control one time in “Auto” mode and hit 60 in 4.1.

When I do launch control in Sport or Track mode I am consistently hitting 3.5 with a best of 3.4. When you got your 4.1 what mode were you in??

 

[JMS935]

Just curious as to your best time of 4.1. I used launch control one time in “Auto” mode and hit 60 in 4.1.

When I do launch control in Sport or Track mode I am consistently hitting 3.5 with a best of 3.4. When you got your 4.1 what mode were you in??

I think that was my one and only attempt with launch control, it surely didn’t seem to work properly. I believe I might’ve been in auto or possibly sport mode. I drive with it in auto. Lots of this seems quite gimmicky to me, as in can we really feel all of these very minor adjustments? I doubt it.

I take full advantage of my WOT passes when on the highway, but have very little room to be doing 0-60 runs where I live. It’d be nice if someone local who knows how to use launch control could show me how to do so, cause I haven’t really figured it out.

 

[Black Track]

Never tried launch control. I have good off-the-line results with custom settings on Track for everything but suspension ride...I leave that on soft.

I think this way it gives the tires a bit more bite as the suspension rocks back a bit on the launch (less wheel slip.)
All the torque has to go somewhere...and the car seems to leave harder than when on firmer settings that often result in more wheel slip.

Have others tried this?