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06-06-2020, 09:06 PM
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#1 |
 Drives: 2018 Chevy Camaro ZL1 M6 Join Date: Oct 2018
Location: Arizona
Posts: 145
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What is the normal spark timing advance at w.o.t.? 91 octane
I couple of times I noticed the car to be down on power. Almost like the PTM kicking in wet mode or something, except it's not in PTM mode and traction control is off. Plugged in my torque app and checked for intake air temperatures, knock retard, ignition timing. Everything looked good except ignition timing was between 2 degrees and 8 degrees at wide open throttle. Closer to the 2 degrees side in higher gears. Seems way low to me. Anyone know?
Last edited by DOHCVTEC; 06-07-2020 at 06:51 PM. |
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06-08-2020, 10:53 AM
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#2 |
 
Drives: 2023 ZL1 M6 Join Date: Sep 2018
Location: Pace FL
Posts: 416
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Stock car will have 23-25 in it depending on air temp. If you have 2 degrees it’s in the low octane table and pulling all it can on top due to air temps. Never seen one pull timing like that though. Unless bad fuel was used and the car was detonating.
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2024 Riverside Blue ZL1 M6
Magnuson 2650R, NW 103, Roto Fab Big Gulp, ARH 2 inch LT's, Stainless Works NPP Signature Forged 20x10.5/20x11.5, BMR springs, BMR Cradle lockout, AAD Billet Control/Trailing arms 2023 Vivid Orange ZL1 M6 - sold 2019 Riverside Blue ZL1 A10 - sold |
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06-08-2020, 11:39 AM
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#3 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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I don't think you can run 23 degrees on 91 octane. I ran 25 degrees with my 2650 on race fuel and meth. I think it closer to about 18 degrees 91.
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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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06-08-2020, 12:42 PM
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#4 |
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Drives: gas powered Join Date: Jan 2019
Location: TN
Posts: 315
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Ill recheck mine but I was thinking I was seeing 22 degrees with 93 octane and possible E85 added in..by mistake of course.
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06-09-2020, 08:04 PM
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#5 |
 
Drives: 2017 ZL1 M6 Join Date: Sep 2019
Location: Fort Bliss, Texas
Posts: 54
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would love to hear back on this thread. Also feel my zl1 is lacking power since I got it. Bought it used from low elevation area now I'm extremely high elevation and I just don't get the same power that I got when I first got it shipped here, for about 1-2 weeks I could w.o.t in 1st and 2nd gear and have my back end whip outa little bit. Now I can't even get a squeal off the dig. Maybe a tune needed?
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06-09-2020, 08:52 PM
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#6 |
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Drives: 2018 ZL1 Join Date: Oct 2019
Location: Texas
Posts: 83
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On E30 I run around 22 degrees of timing. On 93 I can only run around 18 max. Thats with a 9.1 lower pulley.
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2018 ZL1 A10 - Rotofab Intake, LT5 TB, TSP Headers, ATI Balancer, 9.1 Lower Pulley, JMS BAP, Flex Fuel.
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06-09-2020, 09:06 PM
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#7 |
       
Drives: 22' Porsche PDK GT4 Join Date: Mar 2018
Location: Bay Area
Posts: 2,013
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GM motors are VERY octane sensitive.
I dont't have the blower, just the SS 1LE, but I need a 50/50 mixurwe of 101 and 91 to get the full potential on mine here in CA at sea level.
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22' Porsche PDK GT4 (MCS 2-way remote dampers) Previous: 18' NFG 2SS 1LE (ZL1 1LE solid rear cradle bushings & Corsa Exhaust) 16' F80 M3 (Ohlin R/T Coilovers) 13' Audi TTRS (APR Stage 1, MSS Springs) 09' C6 Z06 08' E90 M3 06' 335i (KW V2 Coilovers) 03' C5 Z06 |
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