06-09-2017, 03:40 PM | #1 | |
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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ABS Fuse Pull on 6th Gen ZL1
DO NOT DO THIS!
--------------------------------- Update 20170707: Launch will result in an immediate nose-dive. Yes, you will be able to exceed the 4000 RPM idle limit but some kind of fail-safe kicks in and immediately pulls timing. --------------------------------- Ever since I started bringing my new ZL1 to the drag strip it's been a trade-off between spinning the tires or bogging the motor. I managed to get my ETs down to 11.6 on stock tires by minimizing wheel slip. Then my new rims and drag radials finally arrived. I thought this would solve my problems... well, yes and no. It solved the wheel slip problem but I found that the ECM or one or more of the control subsystems would not allow me to get enough torque off the line to obtain a decent 60-ft time (under 2.0). With the DRs I'd need to launch and maintain a higher launch RPM - I figure between 4500-5000. The 4K RPM idle limit was imposed regardless of what drive mode I was in, even when I "disabled" Traction Control (TC) and Stability Control (SC) by holding down the SC button 5-8 secs. It also seemed to be robbing me of power when it bogged. I had heard before that the "ABS Fuse Pull" worked on the 5th Gen Camaros to improve launch speed but the 5th Gen did not have the 4K RPM idle limit. Apparently, it did pull engine power at launch though. There's not a lot of detail describing exactly what this fuse pull disables or what subsystems are affected. It's even difficult to find the exact fuse numbers to pull. Then trz174 said in a post to one of my recent threads that he's done it on the 5th Gen and 6th Gen ZL1 and it appears to work the same. I decided to do some more digging... Some threads said that the (5th Gen) ZL1 no longer went into the familiar "nose dive" on launch. Here is a post that describes it well: "Line lock for a ZL1.... help please (Post #17)" 10-18-2015 Key phrase: Quote:
WARNING: I should warn anyone attempting this to proceed with caution. Be mindful that this will completely disable the Anti-lock Braking System (ABS). If you press to hard on the brakes you could loose traction and loose control of your vehicle. This also COMPLETELY DISABLES Stabilitrak (Stability Control - SC), Traction Control (TC), and the electronic Limited Slip Differential (eLSD). You will essentially be driving the car full-manual in every respect. I do not recommend this fuse pull for stock/street tires. It's way too easy to loose traction without the controls in place. In no case should this fuse pull be used while driving on public roadways. I intend to try this during tonight's test-n-tune at a local drag strip... I'll let you know how it turns out. --Cal Observations with ABS fuses pulled: Indicators after engine start: 1. In the tachometer display (left), the ((ABS)) & Stability Control Off Icon indicators are illuminated 2. In the speedometer display (right), the word "BRAKE" appears. 3. In the Driver Information Center (DIC): - An "Information" dialog apears stating "Rear Axle System Off". - A "Service" warning appears: "Service Rear Axle" - Near the top, the "SC Off" icon appears. - After a while the "SC Off" icon is replaced by a new icon ((P)) with wrench under it, apparently warning to service parking brake. What stops working: 1. Idle RPM limit. While stopped, any throttle setting up to redline is possible. I only tested to about 5500 RPM. 2. Competitive Driving Modes. No competitive modes or features are available, including line-lock launch control, and no-lift shift. Only main drive modes can be selected. This does not appear to affect the default suspension settings for each drive mode. 3. Anti-lock Braking System. See warning above. 4. NPP does not open baffles while idling, even in "Track" drive mode. It does open up once you hammer the throttle, though. - It's not possible to change "Engine Sound Management" in Infotainment "Settings". I went ahead and changed this to "Track" after replacing the fuses. Hopefully, once set it will retain these settings after the fuse pull. Didn't check this yet. What still works: 1. Parking Brake 2. Drive Mode selection 3. Normal braking 4. No hesitation on acceleration. Engine Compartment Fuse Block: Pull and stow fuses: F1 and F22 Cover Diagram: Fuses: Last edited by cwebster; 07-07-2017 at 06:04 AM. Reason: Update with results |
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06-09-2017, 11:48 PM | #2 |
Drives: 2016 1ss m6 Camaro Join Date: Jul 2016
Location: roxboro,nc
Posts: 197
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Any update on how this worked out for you? Curious if this will help all the m6 guys even in ss trim
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2016 camaro 1ss,m6-npp,tsp longtubes,no cats,e85,tuned by rpm motorsports(451hp/467tq),
17"race stars drag pack,bmr upper and lower trailing arms,bmr upper control arms,bmr front cradle brace,gforce outlaw axles/driveshaft,lnf 2step. Best 1/4 mile of 11.2@122mph |
06-10-2017, 06:59 AM | #3 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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Great post and great research as usual. I did a skim read and you may have covered this. Does this effect the A8 guys as well. I am thinking that a converter simulates clutch slip and TM/TC could see this as wheel spin and do the same thing.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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07-07-2017, 06:00 AM | #4 | ||
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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Quote:
Quote:
After 2 launches resulted in a complete nose dive I put the fuses back in. I was so thoroughly disappointed that, after a few more "normal" passes I quit and spectated for the rest of the night. I haven't been back to the track since then. Pulling the fuses also seems to disable the engine sound management, preventing the baffles from opening on the dual-mode exhaust except for hard acceleration. It's like it stays in Touring mode. I'll post the videos and notes later but I'm preparing to venture out again tonight. I gotta get seat time in the MT DRs. --Cal |
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07-07-2017, 10:38 AM | #5 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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Sorry it didn't work out brother.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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07-08-2017, 08:44 AM | #6 |
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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Sokay, I'll still have fun with it - just not as much fun at the drag strip as anticipated. I've still got a few tricks up my sleeve, though.
For example, next time I'll try a few passes without any burnout on the DR's. This should result in some wheel spin at launch. SOMETHING has to slip to get into the power band where the useful torque is available. If GM will not allow me to slip the clutch then I'm forced to sacrifice some rubber. My best time (11.6) on stock rubber was with moderate wheel spin at launch. Only problem there is that it's much more difficult to accurately and consistently control tire spin than clutch slippage. Too many variables - track condition, temp, humidity, throttle pressure... Still, it's worth a shot. I'm convinced that the main problem with poor launch and low 60 ft / ETs in the 6th Gen ZL1 M6 is the always-on "Manual Transmission Protection" feature described in the document below. It cannot be disabled without a targeted engine tune. I described my rationale in these two posts on another thread: eLSD Wheel Slip % on M6 - post 151 eLSD Wheel Slip % on M6 - post 161 GM Doc ID 4733151 "Manual Transmission Protection Description and Operation" (First posted by dcosta here) |
07-08-2017, 01:18 PM | #7 |
Account Suspended
Drives: 2017 Camaro ZL1 A10 Join Date: May 2012
Location: NJ
Posts: 7,692
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I take it you M6 guys are mainly having trouble when trying to launch the ZL1...is that true? I'm just curious if any of you have tried just going off idle and how that went for you.
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07-08-2017, 01:40 PM | #8 |
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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Not sure what you mean by "just going off idle". All launches with the M6 require some combination of clutch and throttle. All combinations I've tried result in either wheel-spin or ECM intervention.
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07-08-2017, 04:02 PM | #9 |
Drives: 2017 ZL1 Join Date: Jun 2017
Location: Baltimore
Posts: 66
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So. I went to the track last night and been having the same problems, a few Vette guys told me to launch at idle as well. I tried and it worked, I started adding some RPM's to it, I launched at 2k RPM's for 5 passes and the car took off like a rocket twice, got sideways the other 3 times. Trail and error and tons of practice I think we could figure this out
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07-08-2017, 05:20 PM | #10 |
Drives: Used to Drive Blue Camaros Join Date: Oct 2008
Location: Panama City, Florida
Posts: 559
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I had a different experience during Friday TnT. I was first car in the gate and ready to do as many runs as the night would allow. However, racing luck reared it's head and I was only able to get three runs due to continuous water seeping into both lanes at half track.
All runs were with a bone stock ZL1 M6 with 28" Hoosier drag slicks. 3/4 tank of gas. Stock front tires at 40 psi, rear at 18 psi for each run. Rears adjusted for temp at starting line before each run. All shifts were right at redline with not stutter. First run was a baseline with the car in track mode, stabilitrak off, and using launch control. After the first run, the track shut down for several hours so I did the fuse pull for the second and third run. First run was the typical nose dive at launch that makes you feel like a spectator. I ran the second run the same way as the first but with ABS pull. I launched just under 5000 with no nose dive but not a particularly good launch due to wheel spin. Third run was the same (with ABS pull) but with a 4000 launch - car hooked hard and nose dived because I didn't feed power and manage the clutch slip (missed it by that much). Probably could be fixed with a controlled clutch slip + power + practice. My intent was to make as many runs as possible and thrash out the different fuse pull, clutch and other launch combos with the slicks and learn something useful. When the track finally re-opened, I got in two additional runs before they shut down at 11PM. Track was well prepped as always at SGMP and there wasn't much they could do about the water since it rained for 3-4 days straight that week. Tough to draw any conclusions without comparative runs. There is a lot more in the car no matter what combo is used. I just have to figure it out and make it repeatable. Since consistency is out the window at this point, I'll bring the ZL1 M6 to CFest and race the road course and do some drag strip runs but will focus on brackets with the bone stock 16 SS Auto on the original tires. |
07-08-2017, 08:05 PM | #11 |
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Hmm, I think this limitation is only the case with the ZL1 and not with the standard SS. While it took some practice I can now get to a 1.82 60' with only NT555Rs. And I think I can do better once my tune gets sorted out.
No nose dives, but some bogs, and spinouts, along with one smelly clutch run. I think Chevy is protecting the ZL1 drive train. Is it any stouter than the standard SS?
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"Democracy Dies in Darkness" |
07-08-2017, 09:22 PM | #12 | |
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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Quote:
Have fun at the CFest. Wish I were going... |
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07-08-2017, 09:54 PM | #13 | |
Cal
Drives: 2017 6th Gen Camaro ZL1 Coupe M6 Join Date: Sep 2013
Location: Newport, NC
Posts: 779
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Quote:
Yes the ZL1 has beefier drive shaft and half-shafts at least. I think the diff might be stronger too. Still uses the TR-6060 tranny but it's the MJK variant instead of your MM6. |
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07-09-2017, 01:27 AM | #14 | |
Drives: '17 Red hot 2ss, 16 Focus RS Join Date: Aug 2015
Location: Michigan
Posts: 845
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Quote:
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"Spitfire" 427ci
2017 Red Hot 2SS// 6 Piston Brembos//Adrenaline Red Interior, Knee Pads//M6//MRC Afe Air Filter//BMR MM010 Motor Mounts, Safety Loop//Custom OTR Intake//Flex Fuel Kit//Gforce 3.5" Aluminum Driveshaft//GM 95mm TB//Katech Oil Pump, Piston Squirters//Kooks 1-7/8 LT//LT4 Fueling//Mighty Mouse Wild//Monster Clutch LT1-S Triple Disc//MSD 2-Step//Pray Performance Custom Spec Cam, Ported Holley Hi-Ram//Sikky 12" Shifter w OEM Knob Mod//Tick Level 1 Tr6060//Labor by Me//Tune By Pray Performance |
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