10-12-2018, 03:05 PM | #1 |
Drives: My Dad's car is a '16 1SS 6MT Join Date: Jul 2016
Location: Menifee CA
Posts: 76
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Doesn't Make Any Sense
2016 SS M6 with catless LT headers, MSD manifold, CAI, ported TB, and E85.
Using the hptuners horsepower calculation the car made 479 hp at 6000 rpm with 21.5 degrees of timing, then, above 6000 there is a lot of knock retard (6-10 degrees) but, car still makes good power even with the timing retard at high rpm. Now what doesn't make sense is that with 25 degrees of timing at 6000 it makes crappy power but doesn't knock much at above 6000 but it makes way less power, is this possibly false knock? |
10-12-2018, 04:33 PM | #2 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,764
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Have the knock sensors been adjusted in the tune? If not there is your issue.
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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 |
10-12-2018, 06:10 PM | #3 |
Drives: 2017 SS 1LE Join Date: Sep 2011
Location: Los Angeles
Posts: 154
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I thought 21-22 degrees was MBT on these engines. If you’re going past MBT, a drop in power is to be expected...
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2017 1SS 1LE - Eibach Springs | Pray IM | Katech TB | Borla 60606 | Corsa Extreme | E85 Flex Tune
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10-12-2018, 08:09 PM | #4 |
Drives: My Dad's car is a '16 1SS 6MT Join Date: Jul 2016
Location: Menifee CA
Posts: 76
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The knock sensors have been adjusted.
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10-12-2018, 08:30 PM | #5 |
Drives: 2016 2SS A8 Join Date: Feb 2016
Location: Conway, Arkansas
Posts: 217
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On E85 I'm at around 30 degrees of timing at WOT. You might not have the knock sensors turned down enough, or the burst knock decay correct.
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16 Summit White 2SS-MRC-NPP-A8 :: PrayPorted IM - LT5 TB - Mishimoto Catch Can - RotorFab - E85 - TSP 2" LongTubes - Speed Engineering X/Mid Pipe
DIY Hpt Tune - DR - 1.75-60' - 7.47@95 - 11.56@120 with +2676DA |
10-13-2018, 11:56 AM | #6 |
Drives: My Dad's car is a '16 1SS 6MT Join Date: Jul 2016
Location: Menifee CA
Posts: 76
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Really? from what I have seen the car doesn't make good power anything higher than 22 degrees.
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10-14-2018, 12:20 AM | #7 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,764
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Bolt-on setups should make power with 24 degrees on 93 and 28-30degrees on E85 if the tune is right.
__________________
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 |
10-14-2018, 11:07 AM | #8 |
Drives: '17 1ss Join Date: Jun 2017
Location: Borger
Posts: 93
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Running 30-31 here on e85
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10-14-2018, 06:13 PM | #9 | |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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Quote:
E85 is another story since I can't find much scientific literature on the subject. Looking at the factory tunes for the flex fuel engines makes it even more confusing since some of the tunes for different engines don't seem to agree. |
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10-16-2018, 10:21 AM | #10 |
Drives: My Dad's car is a '16 1SS 6MT Join Date: Jul 2016
Location: Menifee CA
Posts: 76
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Yeah there's a reason we bought hptuners so we're not gonna go get it tuned by someone. So, we're in for the long haul in regards to tuning.
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10-16-2018, 11:01 AM | #11 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,764
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Quote:
__________________
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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10-16-2018, 12:45 PM | #12 | |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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Quote:
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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) Last edited by 6spdhyperblue; 10-16-2018 at 01:05 PM. |
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10-16-2018, 01:37 PM | #13 |
BAMF SS
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On the dyno, my car stopped making hp @ 26* of timing on e85. Took it to the track and added timing AMD adjusted fuel until it stopped gaining mph.... ended up around 31* before it stopped, fwiw
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2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance
Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph. |
10-17-2018, 09:18 AM | #14 |
Drives: My Dad's car is a '16 1SS 6MT Join Date: Jul 2016
Location: Menifee CA
Posts: 76
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Update: logged the car yesterday, it made a maximum of 477 hp at 6000 or so and that was with 19.5*. did not get a single degree of retard all the way to 6700 because timing up there was set at 26-28*, weird thing is other runs have made more power above 6000 with lower timing (20-22*) but also had 6-8* of knock retard. And also shouldn't the car want more timing at 4000-6000 rpm?
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