07-12-2023, 05:33 PM | #1 |
Drives: 2017 Chevy Camaro SS Join Date: Nov 2021
Location: MN
Posts: 8
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Launch Control Issue
Recently got a drag pack, I have noticed my launch control isn't properly working. Car has an Lt4 blower, is an A8 with trans and ecu tune. Have tried different things but the launch control still isn't working properly.
With launch control engaged, the rear tires immediately begin spinning for about half a second and the car lurches forward a few inches, stops spinning, starts spinning again, stops, and so on. Once I let off the brakes, the car seems to properly launch. I am wondering if anyone might know what is causing this to happen. Could this be a tune issue? Torque Converter? |
07-13-2023, 11:42 AM | #2 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,710
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To get the car to launch harder with a tune, typically you’ll have to give up launch control
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-13-2023, 12:29 PM | #3 |
Drives: 2017 Camaro SS 50th Anniversary Join Date: Apr 2021
Location: Missouri
Posts: 948
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Did you change either the front or rear dia diameter compared to stock? If all you changed between working/not-working was tires, I suspect tire dia may be a factor.
Sounds weird, but tire dia change can play all sorts of hell on ABS and TC.
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2017 50th Anniversary Edition | P1X Stage 2
DSX Aux Low Side | LT4 high side | Flex Fuel TooHighPsi Port Injection (installed & tuning) CircleD 3K Stall | QA1 CF Driveshaft Forgestar F14 Drag 17x10 NT555R2 305/45/17 Rear Forgestar F14 18x8 NT555G2 235/50/18 Front 10.84@131 w/4.13" pulley ??.??@??? w/3.7" pulley (installed & tuning) |
07-13-2023, 01:00 PM | #4 | |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,815
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Quote:
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'20 ZL1LE A10.
LME 390, E2650, FBO. 1116/967. 15" conversion/Weld/MT ET Street R 325/50R15. 100 octane: 1.35/9.25/151 at 3500 ft. (only one pass so far). 100% meth/100 octane: Alky Twin 10+10 MAF; No dyno or ET. |
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07-13-2023, 06:07 PM | #5 |
Drives: 2017 Chevy Camaro SS Join Date: Nov 2021
Location: MN
Posts: 8
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I would probably agree and just won't bother with it anymore. I just need to lower my psi when doing digs on unprepped surfaces. Have had trouble hooking through first and second on the ET Street Rs which is why I thought launch control might be a better option.
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07-13-2023, 06:55 PM | #6 |
Drives: 2018 Camaro SS vert Join Date: Oct 2020
Location: CT
Posts: 449
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A decent driver and do the job better then the OEM launch control
I had my car at a drag day, was a lot of card breaking down so I was just doing hot lap runs. Would do one with LC, comp mode, let car shift (a*), next with same but without LC, then do same in sport mode, etc By about run #4 or 5 I was getting better times then LC could do
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07-14-2023, 09:16 AM | #7 | |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,873
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Quote:
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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07-15-2023, 07:59 PM | #8 |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
Location: Connecticut
Posts: 2,344
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Its been known and proven over and over, a super good driver will always do better 0-60 or 1/4 mile passes with the nannies off.
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07-27-2023, 01:59 PM | #9 | |
Quote:
Now.. been going through revision tunes on the same set of mods but have also added the front skinnies 28x6 tire.. and doing my first test passes with it it's now doing the same exact thing you've mentioned.. sits for a split second with the rpms and just jerks forward and tries to reset but keeps jerking and isn't working. Someone mentioned the ABS could be getting out of whack readings or whatever for the increased tire height.. I believe stock is 26.8" and the skinnies are 28".. rears have always been 28" (325/50-15) but all of a sudden its doing that jerking.. The reason I've used launch control is because in that sport mode setting it has hooked the car with ease and does NOT feel like it's pulling any power. Tour mode and all nannies off CANNOT hook the car up. I obviously want to run my fastest times but with all the testing I've done, the launch control has been the safe bet for me. Best thing for me and you to do is probably put the stock fronts back on and test it again OR of course learn to launch it off idle.
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2019 A10 ZL1 Just a bolt on LT4 Last edited by BigDawgMuscleX; 08-07-2023 at 12:20 PM. |
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07-27-2023, 03:22 PM | #10 | |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
Location: Connecticut
Posts: 2,344
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07-27-2023, 03:30 PM | #11 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,710
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ZL1 is 26.8 for the front and 27.2 in the rear
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-27-2023, 04:35 PM | #12 |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
Location: Connecticut
Posts: 2,344
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