Efilive turbo tune - getting less timing then commanded
07-19-2010, 06:53 PM
#1
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Efilive turbo tune - getting less timing then commanded Ok, both me an the tuner are stumped here. We are commanding 17* timing and sometimes ending up with 7! As an example @ 5400 and 210kpa my base timing is 27* and subracting 10* at that kpa so I should end up with 17 right? I'm getting 7*. No knock, ECT is not pulling timing, IAT's are not pulling timing. Don't know what's going on with it. We tried turning off the knock sensors, zeroing the iat and ect tables and nothing changes it.
Here's a run down of the engine
402ci ls1
twin turbo
cos3 3bar
engine is in a 64 Chevy II
any Idea's?
Here's a run down of the engine
402ci ls1
twin turbo
cos3 3bar
engine is in a 64 Chevy II
any Idea's?
07-19-2010, 08:36 PM
#3
When you say base timing, I'm thinking base idle timing. I assume you're actually referring to the main spark tables. Have you maxed out all your torque management tables, abuse tables, and MAP/MAF test tables? If you exceed the factory values, the PCM will pull timing and/or close throttle in an effort to preserve the engine.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
07-19-2010, 08:52 PM
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When you say base timing, I'm thinking base idle timing. I assume you're actually referring to the main spark tables. Have you maxed out all your torque management tables, abuse tables, and MAP/MAF test tables? If you exceed the factory values, the PCM will pull timing and/or close throttle in an effort to preserve the engine.
07-19-2010, 10:05 PM
#5
Burst knock will certainly reduce timing if it's left stock.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
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07-20-2010, 08:20 PM
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Are you the guy that tuned Rons Mustang with the LS7?
Frank
Last edited by Boosted One; 07-21-2010 at 05:53 AM.
07-21-2010, 05:27 AM
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Yes, I am the guy that tuned Ron's Mustang with the LS7 - that is one sweet car! I tuned his Cuda with the Hemi in it as well - Ron is one innovative guy! That has to be the only EFI Hemi on the face of the earth controlled by an LS1 computer and sensors...
07-21-2010, 05:07 PM
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Thanks for the help everybody! I finally got it today. Logged some of the dma's and found out it was Burst knock. Pulled 6.8*. Zeroed it out and logged another file and now the timing is solid as a rock and right where it should be.
Thanks for the help!
Frank
Thanks for the help!
Frank
