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Jeep Grand Cherokee
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Discussion Starter · #1 ·
Heading to the parents house this morning(actually while I'm writing this) and I figured I would do some launches since the weather is cold!!

First run - launch control 4.1 seconds
Second run- launch control adjusted with much higher rpm....3.8 seconds!!!!

With the higher rpm launch the car was aching to jump off the line. Funny thing is when I got to the stop sign a chally SRT was there and he stopped me and said "I know what you were doing"....with a smirk on his face hahaha

Well here it is. Happy thanksgiving everyone. Be safe and no drinking and driving with these rigs!
 

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Discussion Starter · #3 ·
Nicely done. I used lc for the first time and hit a 4.2.
That's awesome! With the higher Rpms that you can adjust to it was hard to keep the jeep from letting the tires loose!

Cool thing is....I only have an exhaust. Those guys out there that have exhaust,TB, intake and now with the tuner once they fully get it developed....we are going to see lowwwwww 3s
 

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2014 SRT
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That's awesome! With the higher Rpms that you can adjust to it was hard to keep the jeep from letting the tires loose! Cool thing is....I only have an exhaust. Those guys out there that have exhaust,TB, intake and now with the tuner once they fully get it developed....we are going to see lowwwwww 3s
I agree. I'm forcing myself to keep it stock to 5k then doing exhaust and intake. Then tune once I get a few more miles on it. Good news is I do about 25k a year so it won't take long. :)
 

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What tires you running to grab grip in below zero weather?

great time!
 

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How do you do LC with higher RPM? I thought LC is fully automated and preset from the factory, I wasn't aware there are variations to it. Sorry if it's a stupid question in advance! I've only used it twice on my rig and best I got was 4.2 sec which was plenty fast for me.
 

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Discussion Starter · #11 ·
How do you do LC with higher RPM? I thought LC is fully automated and preset from the factory, I wasn't aware there are variations to it. Sorry if it's a stupid question in advance! I've only used it twice on my rig and best I got was 4.2 sec which was plenty fast for me.
What you do is come to a complete stop. Activate LC. Press and hold LC while turning the knob clockwise. I think we have 12 clicks. Each click is another 100 rpm. Try you'll see the difference. Let me know of it works
 

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Discussion Starter · #13 ·
Never mind, found the answer with a quick google search. Interesting to say the least... in cold weather technically the lower rpm should be better for controlling wheel slip.
Ya that's what I was thinking. I had no wheel slip or nothing surprising. It jus wanted to get off that line fast!!! Haha
 

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2019 JEEP CHEROKEE
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470 Posts
Launching off the line is where your 60' times come in as a good launch with a bone stock or even with a tune and couple bolt on mods is 1.75 to 1.80. You get those times at the track then you no your hooking up. Remember hooking on the street is easy but hooking at the track is another thing.
 

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Discussion Starter · #17 ·
At 0600 hours this morning. 32 degrees I hit 4.0 twice. Bone stock. 1st run with launch, 2nd without.
good work my man!!!! very solid…. all i am running with is a borla atak and a 180 degree stat
 

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Discussion Starter · #19 ·
What's the highest you all can get your launch control? Mine will not go past 3000RPM. Even when I manually hold the brake/floor it I still can't get it past 3000.
Around 3300-3500 I think it is. Don't exactly quote me but I know atleast 3200
 

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2018 Jeep Trackhawk
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I found a lower rpm to work better in colder weather...say about 1800
 
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