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08-16-2020, 08:33 AM
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#1 |
         
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,559
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'20 A10 LT4 redline and rev limit (?)
My 10-sp is short shifting at 5500-6000 rpm in both track and sport modes (I'll try it this morning in tour) on the 1/2 shift and sometimes 2/3 shift.
Maximum LT4 HP is at 6400 rpm so I naturally assume a good shift point is around 6600 rpm. Who else here has had this short shift/rev limit issue and how did you solve it?
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
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08-16-2020, 09:12 AM
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#2 |
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Account Suspended
Drives: 19 Camaro SS 1LE, 03 Ford Lightning Join Date: Nov 2019
Location: South Carolina
Posts: 334
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How many miles are on the car? I don't think GM has any kind of HP or RPM limiters built into the Camaros, but they do on the C8's. I think you have to hit like 500 miles to get the max HP from them or something like that.
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08-16-2020, 09:13 AM
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#3 |
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Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,675
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Short shifting the 1-2 and a bit on the 2-3 usually makes you faster, especially cars with fat torque curves and aggressive gearing. They are set like that from the factory
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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) |
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08-16-2020, 09:36 AM
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#4 |
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Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,559
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1800 miles
My experience is that shifting at or just beyond max hp is best.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
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08-16-2020, 09:38 AM
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#5 |
 
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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JSH, I wonder if the tune you have might be causing the situation you are experiencing since your ZL1 is modded.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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08-16-2020, 09:44 AM
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#6 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,799
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Probably because your trans tune is stock but your engine tune is modified. I don't think you can tune the TCM(I know for fact on the SS not sure on the ZL1) in the 2020+ since GM switched to the T93 controller. So the only thing you can do is manually shift it if you want to shift higher.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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08-16-2020, 09:45 AM
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#7 | |
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Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,559
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Quote:
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
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